10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2015

Or

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File No. 001-35083

GSI Group Inc.

(Exact name of registrant as specified in its charter)

New Brunswick, Canada	98-0110412
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
125 Middlesex Turnpike	01730
Bedford, Massachusetts, USA	(Zip Code)
(Address of principal executive offices)

(781) 266-5700

(Registrant’s telephone number, including area code)

Securities Registered Pursuant to Section 12(b) of the Act:

Title of Each Class	Name of Exchange on Which Registered
Common Shares, no par value	The NASDAQ Stock Market LLC

Securities Registered Pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ¨    No  þ

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.    Yes  ¨    No  þ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  þ    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  þ    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ¨ 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer ¨	Accelerated filer þ	Non-accelerated filer ¨	Smaller reporting company ¨
(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No   þ

The aggregate market value of the Registrant’s outstanding common shares held by non-affiliates of the Registrant, based on the closing price of the common shares on the NASDAQ Global Select Market on the last business day of the Registrant’s most recently completed second fiscal quarter (July 3, 2015) was $430,444,038. For purposes of this disclosure, common shares held by officers and directors of the Registrant and by persons who hold more than 5% of the Registrant’s outstanding common shares have been excluded because such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily conclusive.

As of February 26, 2016, there were 34,346,589 of the Registrant’s common shares, no par value, issued and outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Registrant’s Definitive Proxy Statement for the Registrant’s Annual Meeting of Shareholders scheduled to be held on May 10, 2016 to be filed with the Securities and Exchange Commission are incorporated by reference in answer to Part III of this Annual Report on Form 10-K.

GSI GROUP INC.

FORM 10-K

YEAR ENDED DECEMBER 31, 2015

TABLE OF CONTENTS

Item No.		Page No.
PART I
Item 1.	Business	1
Item 1A.	Risk Factors	9
Item 1B.	Unresolved Staff Comments	20
Item 2.	Properties	20
Item 3.	Legal Proceedings	21
Item 4.	Mine Safety Disclosures	21
PART II
Item 5.	Market for Registrant’s Common Shares, Related Stockholders Matters and Issuer Purchases of Equity Securities	22
Item 6.	Selected Financial Data	23
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	26
Item 7A.	Quantitative and Qualitative Disclosures about Market Risk	43
Item 8.	Financial Statements and Supplementary Data	44
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	94
Item 9A.	Controls and Procedures	94
Item 9B.	Other Information	95
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	96
Item 11.	Executive Compensation	96
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	96
Item 13.	Certain Relationships and Related Transactions, and Directors Independence	96
Item 14.	Principal Accounting Fees and Services	96
PART IV
Item 15.	Exhibits and Financial Statement Schedules	97
Signatures		101

As used in this report, the terms “we,” “us,” “our,” “GSI Group,” “GSI,” “GSIG” and the “Company” mean GSI Group Inc. and its subsidiaries, unless the context indicates another meaning.

Unless otherwise noted, all dollar amounts in this report are expressed in United States dollars.

The following brand and trade names of GSI Group Inc. are used in this report: MicroE Systems, Celera Motion, Westwind, Synrad, Cambridge Technology, ExoTec Precision, General Scanning, Photo Research, JADAK, NDS, Dome, NDSsi, Applimotion, Lincoln Laser and Skyetek.

PART I

Cautionary Note Regarding Forward Looking Statements

Except for historical information, the matters discussed in this Annual Report on Form 10-K are forward looking statements that involve risks, uncertainties and assumptions that, if they never materialize or if they prove incorrect, could cause our consolidated results to differ materially from those expressed or implied by such forward looking statements. The Company makes such forward looking statements under the provision of the “Safe Harbor” section of the Private Securities Litigation Reform Act of 1995. Actual future results may vary materially from those projected, anticipated, or indicated in any forward looking statements as a result of various important factors, including those set forth in Item 1A of this Annual Report on Form 10-K under the heading “Risk Factors.” Readers should also carefully review the risk factors described in the other documents that we file from time to time with the SEC. In this Annual Report on Form 10-K, the words “anticipates,” “believes,” “expects,” “intends,” “future,” “could,” “estimates,” “plans,” “would,” “should,” “potential,” “continues” and similar words or expressions (as well as other words or expressions referencing future events, conditions or circumstances) identify forward looking statements. Forward looking statements also include the assumptions underlying or relating to any of the forward looking statements. The forward looking statements contained in this Annual Report include, but are not limited to, statements related to: our belief that the Purchasing Managers Index (PMI) may provide an indication of the impact of general economic conditions on our sales into the advanced industrial end market; anticipated financial performance; expected liquidity and capitalization; drivers of revenue growth; management’s plans and objectives for future operations, expenditures and product development, and investments in research and development; business prospects; potential of future product releases; anticipated revenue performance; industry trends; market conditions; changes in accounting principles; changes in actual or assumed tax liabilities; expectations regarding tax exposures; anticipated reinvestment of future earnings; anticipated expenditures in regard to the Company’s benefit plans; future acquisitions and dispositions and anticipated benefits from acquisitions; anticipated use of currency hedges; ability to repay our indebtedness; our intentions regarding the use of cash; and other statements that are not historical facts. All forward looking statements included in this document are based on information available to us on the date hereof. We will not undertake and specifically decline any obligation to update any forward looking statements.

Item 1. Business

OVERVIEW

GSI Group Inc. and its subsidiaries (collectively referred to as the “Company”, “we”, “us”, “our”) design, develop, manufacture and sell precision photonic and motion control components and subsystems to Original Equipment Manufacturers (“OEM’s”) in the medical equipment and advanced industrial technology markets. Our highly engineered enabling technologies include laser sources, laser scanning and beam delivery products, optical data collection and machine vision technologies, medical visualization and informatics solutions, and precision motion control products. We specialize in collaborating with OEM customers to adapt our component and subsystem technologies to deliver highly differentiated performance in their applications.

GSI Group Inc. was founded and initially incorporated in Massachusetts in 1968 as General Scanning, Inc. (“General Scanning”). General Scanning developed, manufactured and sold components and subsystems used for high-speed micro positioning of laser beams. In 1999, General Scanning merged with Lumonics Inc., a Canadian company that developed, manufactured and sold laser-based advanced manufacturing systems for electronics, semiconductor, and general industrial applications. The post-merger entity, GSI Lumonics Inc., continued under the laws of the Province of New Brunswick, Canada. In 2005, the Company changed its name to GSI Group Inc.

Strategy

Our strategy is to drive sustainable, profitable growth through short-term and long-term initiatives, including:

· improving our business mix to increase medical sales as a percentage of total revenue by:

- introducing new products aimed at attractive medical applications, such as minimally invasive and robotic surgery, ophthalmology, patient monitoring, drug delivery, diagnostic testing and life science research;

- cross selling our entire product offerings to the leading medical equipment manufacturers; and

- pursuing complementary medical technology acquisitions;

· increasing our penetration of high growth advanced industrial technology applications, such as laser materials processing, robotics, automation, metrology, and micromachining, by working closely with OEM customers to launch application specific products that closely match the requirements of each application;

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· broadening our portfolio of enabling technologies and capabilities through increased new product development investment, expanded sales and marketing channels to reach target customers and, investments in application development to further penetrate existing customers, while expanding the applicability of our solutions to new markets; 

· broadening our product and service offerings through the acquisition of innovative and complementary technologies and solutions in medical and advanced industrial technology applications, including increasing our recurring revenue streams such as services, spare parts and consumables;

· improving our existing operations to expand profit margins and improve customer satisfaction by implementing lean manufacturing principles and strategic sourcing across our major production sites; and

· attracting, retaining, and developing world-class talented and motivated employees.

Acquisitions

In December 2015, the Company acquired all assets and certain liabilities of Skyetek Inc., a Denver, Colorado-based provider of embedded and standalone radio frequency identification (“RFID”) solutions for OEM customers in the medical and advanced industrial markets, for a total purchase price of $2.8 million. Cash paid upon closing was $2.6 million, subject to customary working capital adjustments.

In November 2015, the Company acquired certain assets and liabilities of Lincoln Laser Company, a Phoenix, Arizona-based provider of ultrafast precision polygon scanners and other optical scanning solutions for the medical, food processing, and advanced industrial markets, for a total purchase price of $12.2 million. Cash paid upon closing was $10.3 million, subject to customary working capital adjustments.

In February 2015, the Company acquired Applimotion Inc., a Loomis, California-based provider of advanced precision motor and motion control technology to OEM customers in the medical and advanced industrial markets, for a total purchase price of $14.0 million. Cash paid upon closing was $13.0 million, net of working capital adjustments.

In March 2014, the Company acquired JADAK LLC, JADAK Technologies Inc. and Advance Data Capture Corporation (together, “JADAK”), a North Syracuse, New York-based provider of optical data collection and machine vision technologies to OEM medical device manufacturers, for a total purchase price of $93.7 million, net of working capital adjustments.

In January 2013, the Company acquired NDS Surgical Imaging LLC (“NDS”), a San Jose, California-based company that designs, manufactures, and markets high definition visualization solutions and imaging informatics products for the surgical, radiology and patient monitoring end markets, for a total final purchase price of $75.4 million, net of working capital adjustments.

Divestitures and Product Rationalization

We continuously evaluate our business mix and financial performance. Since 2011, we have executed a series of divestitures in line with our strategy.

In January 2016, the Company decided to discontinue its radiology products, sold under the Dome brand name and operated within the Company’s Visualization Solutions product line. Total revenue from these products was approximately $9 million in 2015.

In June 2015, the Company finalized an agreement to divest its 50% owned joint venture in India, Excel Laser Technology Private Limited, for net cash proceeds of $0.2 million.

In April 2015, the Company completed the sale of its fiber laser business, operated under the JK Lasers brand name, for $29.6 million in cash, net of working capital adjustments.

In July 2014, the Company completed the sale of the Scientific Lasers business, operated under the Continuum and Quantronix brand names, for $6.5 million in cash, net of working capital adjustments.

In May 2013, the Company sold the Semiconductor Systems business, operated under the GSI Group brand name, for $9.7 million in cash, net of working capital adjustments.

In October 2012, the Company divested the Lasers Systems business, operated under the Control Laser and Baublys brand names, for $6.6 million in cash, net of working capital adjustments.

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Segments

The Company evaluates the performance of, and allocates resources to, its segments based on revenue, gross profit and operating profit. The Company’s reportable segments have been identified based on commonality and adjacency of technologies, applications, and customers amongst the Company’s individual product lines.

The following table shows the external revenues, gross profit margin and operating profit for each of the segments for the year ended December 31, 2015 (dollars in thousands):

	Revenue		Gross Profit Margin			Operating Profit
Laser Products	$	168,331		43.7	%	$	35,971
Vision Technologies		124,725		39.3	%		(2,057	)
Precision Motion		80,542		45.6	%		16,877

See Note 16 to Consolidated Financial Statements for additional financial information about our reportable segments.

Laser Products

The Laser Products segment designs, manufactures and markets photonics-based solutions, including CO2 laser sources, laser scanning and laser beam delivery products, to customers worldwide. The segment serves highly demanding photonics-based applications such as industrial material processing, metrology, medical and life science imaging, and medical laser procedures. The vast majority of the segment’s product offerings are sold to Original Equipment Manufacturer customers. The segment sells these products both directly, utilizing a highly technical sales force, and indirectly, through resellers and distributors.

The Laser Products segment is comprised of three product lines:

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Product Line	Key End Market	Brand Names	Description
Laser Beam Delivery Components	Advanced Industrial and Medical	Cambridge Technology, Lincoln Laser & ExoTec Precision	Galvanometer and polygon based optical scanning components. These products provide precise control and delivery of laser beams through motorized manipulation of mirrors and optical elements for OEM manufacturers to integrate with their controlling hardware and software. Applications include material processing (such as laser marking, laser machining and laser drilling), scanning microscopy, laser-based vision correction, optical coherence tomography imaging, high resolution printing, holographic imaging and storage, metrology, and 2D or 3D imaging.
Laser Beam Delivery Solutions	Advanced Industrial and Medical	Cambridge Technology, Lincoln Laser & Synrad	Galvanometer and polygon based optical scan heads. These products provide precise control and delivery of laser beams through motorized manipulation of mirrors and optical elements in two and three axis scan heads, scanning subsystems, and controlling hardware and software. Applications include material processing (such as laser marking, laser coding, laser engraving, laser machining and laser drilling), scanning microscopy, laser-based vision correction, optical coherence tomography imaging, high resolution printing, holographic imaging and storage, metrology, and 2D or 3D imaging. Laser processing heads are used for laser cutting and welding as well as for brazing in the advanced manufacturing industry.
CO2 Lasers	Advanced Industrial	Synrad	Both continuous and pulsed sealed CO2 lasers with power ranges from 5 to 400 watts. Applications include coding, marking, engraving, cutting and trimming of metals and non-metals, fine materials processing, additive manufacturing, packaging converting, and medical applications in dental and dermatology.

Vision Technologies

The Vision Technologies segment (formerly known as Medical Technologies) designs, manufactures and markets a range of medical grade technologies, including visualization solutions, imaging informatics products, optical data collection and machine vision technologies, RFID technologies, thermal printers, and light and color measurement instrumentation to customers worldwide. The vast majority of the segment’s product offerings are sold to Original Equipment Manufacturer customers. The segment sells these products both directly, utilizing a highly technical sales force, and indirectly, through resellers and distributors.

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The Vision Technologies segment has six product lines:

Product Line	Key End Market	Brand Names	Description
Visualization Solutions	Medical	NDS, NDSsi, Dome	High definition visualization solutions for minimal invasive surgery, patient monitoring and diagnostic radiology applications.
Imaging Informatics	Medical	NDS, NDSsi	Imaging management for visual information, including real-time distribution, documentation, control, and streaming for multiple imaging modalities for surgical applications.
Optical Data Collection, Machine Vision Technologies	Medical and Advanced Industrial	JADAK	Camera based data collection solutions ranging from barcode scanning operations to machine vision operations performing image analysis within medical devices.
Radio Frequency Identification (RFID)	Medical and Advanced Industrial	JADAK, Skyetek	RFID and data collection technologies via High-Frequency (HF) and Ultra-High Frequency (UHF) readers, writers and antennas.  Used for surgical part tracking and counterfeit detection.
Thermal Printers and Chart Recorders	Medical	General Scanning, JADAK	Rugged thermal printers and chart recorders for patient monitoring, defibrillator equipment, blood gas analyzers, and pulse oximeters.
Light and Color Measurement	Advanced Industrial and Medical	Photo Research	Light and color measurement metrology devices, including spectroradiometers, photometers, video photometers, and color characterization software used in the visualization solutions market, research and development, quality control, and other testing markets.

Precision Motion

The Precision Motion segment designs, manufactures and markets optical encoders, precision motors and other motion control technology, air bearing spindles and precision machined components to customers worldwide. The segment’s product offerings are sold into the advanced industrial market and the medical market. The segment sells these products both directly, utilizing a highly technical sales force, and indirectly, through resellers and distributors.

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The Precision Motion segment includes fourproduct lines:

Product Line	Key End Market	Brand Names	Description
Optical Encoders	Advanced Industrial and Medical	Celera Motion, MicroE	Precision optical encoders from core product brand, MicroE.  Applications include motion control of equipment and instruments used in the semiconductor and electronics manufacturing, industrial and medical robotics, metrology, satellite communications, medical devices, and laboratory & diagnostics markets.
Precision Motors	Advanced Industrial and Medical	Celera Motion, Applimotion	Precision direct drive motor components from core product brand, Applimotion.  Applications include motion control of equipment and instruments used in the semiconductor and electronics manufacturing, industrial and medical robotics, autonomous vehicles, metrology, satellite communications, surveillance, medical devices, and laboratory & diagnostics markets.
Integrated Motion Control Solutions	Advanced Industrial and Medical	Celera Motion	Precision integrated motion control solutions.  Applications include motion control of equipment and instruments used in the semiconductor and electronics manufacturing, industrial and medical robotics, autonomous vehicles, metrology, satellite communications, surveillance, medical devices, and laboratory & diagnostics markets.
Air Bearing Spindles	Advanced Industrial	Westwind	High-speed and precision air bearing spindles used in the PCB manufacturing, automotive coating, semiconductor manufacturing equipment, micro machining and power generation markets.

End Markets

We primarily operate in two end markets: the advanced industrial market and the medical market.

Advanced Industrial Market

For the year ended December 31, 2015, the advanced industrial market accounted for approximately 60% of the Company’s revenue.  Revenue from our products sold to the advanced industrial market is affected by a number of factors, including changing technology requirements and preferences of our customers, productivity or quality investments in a manufacturing environment, the financial condition of our customers, changes in regulatory requirements and laws, and general economic conditions. We believe that the Purchasing Managers Index (PMI) on manufacturing activities specific to different regions around the world may provide an indication of the impact of general economic conditions on our sales into the advanced industrial market.

Medical Market

For the year ended December 31, 2015, the medical market accounted for approximately 40% of the Company’s revenue.  Our revenue from products sold to the medical market is generally affected by hospital and other health care provider capital spending, changes in regulatory requirements and laws, aggregation of purchasing by healthcare networks, trends in surgical procedures, changes in technology requirements, changes in customers or patient preferences, and general demographic trends.

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Customers

We have a diverse group of customers that include companies that are global leaders in their industries. Many of our customers participate in several market industries. No customer accounted for greater than 10% of our consolidated revenue during the years ended December 31, 2015, 2014 or 2013.

Customers of our Laser Products, Vision Technologies, and Precision Motion segments include a large number of original equipment manufacturers who integrate our products into their systems for sale to end users. We also sell directly to end users. Our customers include leaders in the medical and advanced industrial markets. A typical OEM customer will usually evaluate our products and our ability to provide application knowledge and expertise, post-sales application support and services, supply chain management over long durations, manufacturing capabilities, product quality, global presence, and product customization before deciding to incorporate our products into their products or systems. Customers generally choose suppliers based on a number of factors, including product performance, reliability, application support, price, breadth of the supplier’s product offerings, the financial condition of the supplier, and the geographical coverage offered by the supplier. Once certain of our products have been designed into a given OEM customer’s product or system, there are generally significant barriers to subsequent supplier changes, especially in the medical market.

Seasonality

While our revenues are not highly seasonal on a consolidated basis, the revenues of some of our individual product lines, particularly our visualization solutions, imaging informatics, and thermal printer products, are impacted by seasonality due to hospital budgeting cycles.

Backlog

As of December 31, 2015 and 2014, our consolidated backlog was approximately $96.8 million and $82.1 million, respectively. The majority of open orders included in backlog represent open orders for products and services that, based on management’s projections, have a reasonable probability of being delivered over the subsequent twelve month period. Orders included in backlog may be canceled or rescheduled by customers without significant penalty. Management believes that backlog is not a meaningful indicator of future business prospects for any of our business segments due to the short lead time required on our products and the ability of customers to reschedule or cancel orders. Therefore, backlog as of any particular date should not be relied upon as indicative of our revenues for any future period.

Manufacturing

Manufacturing functions are performed internally when management chooses to maintain control over critical portions of the production process or for cost related reasons while some of the less critical portions are outsourced to third parties. To the extent it makes financial sense, we will consider outsourcing additional portions of the production process.

Products offered by our Laser Products segment are manufactured at facilities in Bedford, Massachusetts; Mukilteo, Washington; Phoenix, Arizona; Taunton, United Kingdom; and Suzhou, China. Products offered by our Vision Technologies segment are manufactured at facilities in Syracuse, New York; San Jose and Chatsworth, California; Bedford, Massachusetts; and Suzhou, China. Products offered by our Precision Motion segment are primarily manufactured at facilities in Bedford, Massachusetts; Loomis, California; Poole, United Kingdom; and Suzhou, China.

Many of our products are manufactured under ISO 9001 certification, while the majority of our products manufactured for the medical market are manufactured under ISO 13485 certification. Certain visualization solutions, thermal printers and imaging informatics products are manufactured under current good manufacturing practices (CGMP’s), which is a requirement of their medical device classification by the U.S. Food and Drug Administration (the “FDA”). In addition, certain visualization solutions, thermal printers and imaging informatics products are manufactured under section 510(k) of the FDA.

Research and Development and Engineering

We incur research and development and engineering expenses as part of our ongoing operations. We are strongly committed to research and development for core technology programs directed at creating new products, product enhancements, increasing our addressable market, and new applications for existing products. We are also committed to funding research into future market opportunities. Our markets have experienced rapid technological changes and product innovations. We believe that continued timely development of new products and product enhancements to serve existing and new markets is necessary for us to remain competitive. Research and development and engineering expenses were $31.0 million, or 8.3% of revenue, for the year ended December 31, 2015,

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compared to $29.0 million, or 7.9% of revenue, for the year ended December 31, 2014 and $23.8 million, or 7.5% of revenue, for the year ended December 31, 2013.

Marketing, Sales and Distribution

We sell our products globally, primarily through our direct sales force. Sales to foreign jurisdictions are largely based on a direct sales force, but occasionally sold through distributors, including manufacturers’ representatives, to either augment our selling effort or address a local market where we have no direct sales force. Our local sales, applications, and service teams, and our distributors work closely with our customers to ensure customer satisfaction with our products. We have sales and service centers located in North America, Europe, China, and Japan.

To support our sales efforts we maintain and continue to invest in a number of applications centers around the world, where our applications experts work closely with customers on integrating and using our solutions in their equipment. The applications span a wide range, with teams residing in several facilities in the United States, Europe and Asia.

Competition

The markets in which we compete are dynamic and highly competitive. Due to the wide range of our products, we face many different types of competition and competitors. This affects our ability to sell our products and the prices at which these products are sold. Our competitors range from large foreign and domestic organizations, which produce a comprehensive array of goods and services and may have greater financial and other resources than we do, to small firms producing a limited number of goods or services for specialized market segments.

Competitive factors in our Laser Products, Vision Technologies, and Precision Motion segments include product performance, price, quality and reliability, features, compatibility of products with existing systems, technical support, product breadth, market presence, on-time delivery and our overall reputation. We believe that our products offer a number of competitive advantages. However, some of our competitors are substantially larger and have greater financial and other resources.

Raw Materials, Components and Supplies

Each of our businesses uses a wide variety of raw materials, key components and parts that are generally available from alternative sources of supply and in adequate quantities from domestic and foreign sources. In some instances, we design and/or re-engineer the parts and components used in our products. For certain critical raw materials, key components and parts used in the production of some of our principal products, we have identified only a limited number of suppliers or, in some instances, a single source of supply. We also rely on a limited number of independent contractors to manufacture subassemblies for some of our products.

For a further discussion of the importance and risks associated with our supply chain, see applicable risk factors under Item 1A of this Annual Report on Form 10-K.

Patents and Intellectual Property

We rely upon a combination of copyrights, patents, trademarks, trade secret laws and restrictions on disclosure to protect our intellectual property rights. We hold a number of registered and pending patents in the United States and other countries. In addition, we also have trademarks registered in the United States and foreign countries. We will continue to actively pursue applications for new patents and trademarks as we deem appropriate. However, there can be no assurance that any other patents will be issued to us or that such patents, if and when issued, will provide any protection or benefit to us.

Although we believe that our patents and pending patent applications are important, we rely upon several additional factors that are essential to our business success, including: market position, technological innovation, know-how, application knowledge and product performance. However, there can be no assurance that we will be able to sustain these advantages.

We also protect our proprietary rights by controlling access to our proprietary information and by maintaining confidentiality agreements with our employees, consultants, and certain customers and suppliers. For a further discussion of the importance of risks associated with our intellectual property rights, see applicable risk factors under Item 1A of this Annual Report on Form 10-K.

Human Resources

As of December 31, 2015 and 2014, we employed 1,355 and 1,418 employees, respectively, of which zero and 36 employees, respectively, were part of our discontinued businesses.

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Geographic Information

We are a multinational company with approximately 59% of our 2015 revenue outside the United States and approximately 14% of our property, plant and equipment, net, outside the United States at December 31, 2015. Geographic information is discussed in Note 16 to Consolidated Financial Statements. For a further discussion of the risks associated with our foreign operations, see applicable risk factors under Item 1A of this Annual Report on Form 10-K.

Government Regulation

Our current and contemplated activities and the products and processes that will result from such activities are subject to substantial government regulations, both in the United States and internationally.Most of our production facilities are subject to various federal, state, local, and/or foreign environmental regulations, related to the use, storage, handling, and disposals of regulated materials, chemical, and certain waste products. Such rules are subject to change by the governing agency and we monitor those changes closely. We expect all operations to meet the legal and regulatory environmental requirements. Although we believe that our safety procedures for using, handling, storing and disposing of such materials comply with the standards required by federal and state laws and regulations, we cannot completely eliminate the risk of accidental contamination or injury from these materials.    

We may face the potential of increasing complexity in our product designs and procurement operations due to the evolving nature of product compliance standards. Those standards may impact the material composition of our products entering specific markets. Such regulations went into effect in the European Union (“EU”) in 2006, (The Restriction of Hazardous Substances Directive (RoHS)) and 2007 (Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH)), and China in 2007 (Management Methods for Controlling Pollution Caused by Electronic Information Products Regulation (China-RoHS)).

United States Food and Drug Administration

Certain products manufactured by us are integrated into systems by our customers that are subject to certain regulations administered by the United States Food and Drug Administration. We must comply with certain quality control measurements in order for our products to be effectively used in our customers’ end products. Non-compliance with quality control measurements could result in loss of business with our customers, fines and penalties.

We are subject to certain medical device regulations. Medical devices are subject to extensive and rigorous regulation by the Food and Drug Administration and by other federal, state and local authorities. The Federal Food, Drug and Cosmetic Act and related regulations govern the conditions of safety, efficacy, clearance, approval, manufacturing, quality system requirements, labeling, packaging, distribution, storage, record keeping, reporting, marketing, advertising, and promotion of products. Non-compliance with applicable requirements can result in, among other things, fines, injunctions, civil penalties, recall or seizure of products, total or partial suspension of production, refusal by the government to grant premarket clearance or approval of products, withdrawal of clearances and approvals, and criminal prosecution.

Other Information

We maintain a website with the address www.gsig.com. We are not including the information contained on our website as part of, or incorporating it by reference into, this Annual Report on Form 10-K. We make available, free of charge through our website, our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to these reports as soon as reasonably practicable after we electronically file these materials with, or otherwise furnish them to, the Securities and Exchange Commission (“SEC”). In addition, our reports and other information are filed with securities commissions or other similar authorities in Canada, and are available over the Internet at www.sedar.com.

Item 1A. Risk Factors

The following risk factors could have a material adverse effect on our business, financial position, results of operations and cash flows and could cause the market value of our common shares to fluctuate or decline. These risk factors may not include all of the important factors that could affect our business or that could cause our future financial results to differ materially from historic or expected results or cause the market price of our common shares to fluctuate or decline.

Risks Relating to our Business

Our results of operations could be adversely affected by economic and political conditions and the effects of these conditions on our customers’ businesses and levels of business activities.

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A large portion of our product sales are dependent on the need for increased capacity, productivity and cost saving initiatives, improved product quality and performance, and new investments by our customers. Weaknesses in our end markets could negatively impact our revenue and gross margin and consequently have a material adverse effect on our business, financial condition and results of operations. For instance, uncertainty in our medical and advanced industrial end markets has caused customers in those markets to purchase fewer products from us during certain recent quarters. If such uncertainty continues or worsens, we may not be able to meet anticipated revenue levels on a quarterly or annual basis. Moreover, a severe and/or prolonged economic downturn or a negative or uncertain political climate could adversely affect our customers’ financial condition and the timing or levels of business activity of our customers and the industries we serve. In particular, reduced growth expectations in China and the uncertain European financial situation could have an impact on our customers’ financial condition and ability to maintain product orders in the future. This may reduce the demand for our products or depress pricing for our products and have a material adverse effect on our results of operations. Changes in global economic conditions could also shift demand to products or services for which we do not have competitive advantages, and this could negatively affect the amount of business that we are able to obtain. In addition, if we are unable to successfully anticipate changing economic and political conditions, we may be unable to effectively plan for and respond to those changes, and our business could be negatively affected.

Our business depends significantly upon our customers’ capital expenditures, which are subject to cyclical market fluctuations.

The microelectronics and industrial capital equipment industries are cyclical and have historically experienced periods of oversupply, resulting in downturns in demand for capital equipment in which many of our products are used. The timing, length and severity of these cycles, and their impact on our business, are difficult to predict. Further, our order levels or results of operations for a given period may not be indicative of order levels or results of operations for subsequent periods. For the foreseeable future, our operations will continue to depend upon industries that are subject to market cycles which, in turn, could adversely affect the market for our products.

We experienced significant cyclical fluctuations in the past. We cannot assure you that such slowdowns will not recur or that the impact of such slowdowns will be more or less significant compared to historical fluctuations.

Our business success depends upon our ability to respond to fluctuations in product demand, but doing so may require us to incur costs despite limited visibility toward future business declines.

In periods of weak demand, we may be required to reduce costs while maintaining the ability to motivate and retain key employees at the same time. Additionally, to remain competitive, we must also continually invest in research and development, which may inhibit our ability to reduce costs in a down cycle. Long product lead-times create a risk that we may purchase or manufacture inventories of products that we are unable to sell.

During a period of increasing demand and rapid growth, we must be able to increase manufacturing capacity quickly. Our inability to quickly increase production in response to a surge in demand could prompt customers to look for alternative sources of supply or leave our customers without a supply, both of which events could harm our reputation and make it difficult for us to retain our existing customers or to obtain new customers.

The success of our business depends on our ability to continuously innovate and to manage transition to new product innovations.

Technology requirements in our markets are constantly advancing. We must continually introduce new products that meet evolving customer needs. Our ability to grow depends on the successful development, introduction and market acceptance of new or enhanced products that address our customer’s requirements. Developing new technology is a complex and uncertain process requiring us to accurately anticipate technological and market trends and meet those trends with responsive products. Additionally, this requires that we manage the transition from older products to minimize disruption in customer ordering patterns, avoid excess inventory and ensure adequate supplies of new products. Failure to develop new products, failed market acceptance of new products or problems associated with new product transitions could harm our business.

If we fail to introduce new products in a timely manner, we may lose market share and be unable to achieve revenue growth targets.

Our research and development efforts may not lead to the successful introduction of products within the time frame that our customers demand. Our competitors may introduce new or improved products, processes or technologies that make our current or proposed products obsolete or less competitive. We may encounter delays or problems in connection with our research and development efforts. Product development delays may result from numerous factors, including:

· changing product specifications and customer requirements;

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· inability to manufacture new products cost effectively;  

· difficulties in reallocating engineering resources and overcoming resource limitations;

· changing market or competitive product requirements; and

· unanticipated engineering complexities.

New products often take longer to develop, may have fewer features than originally considered desirable, and have higher costs than initially estimated. There may be difficulty in sourcing components for new products and delays in starting volume production. New products may also not be commercially successful. Any of these adverse developments could harm our business and our results of operations.

Customer order timing and other factors beyond our control may cause our operating results to fluctuate from period to period.

Changes in customer order timing and the existence of certain other factors beyond our control may cause our operating results to fluctuate from period to period. Such factors include:

· fluctuations in our customers’ businesses;

· timing and recognition of revenues from customer orders;

· timing and market acceptance of new products or enhancements introduced by us or our competitors;

· availability of parts from our suppliers and the manufacturing capacity of our subcontractors;

· decisions by customers to reduce their purchases of our products;

· changes in the prices of our products or of our competitors’ products; and

· fluctuations in foreign currency exchange rates.

We may receive several large orders in one quarter from a customer and then receive no orders from that customer in the next quarter. As a result, the timing of revenue recognition from customer orders can cause significant fluctuations in our operating results from quarter to quarter. In addition, our sales are reactive to changes in our customers’ businesses. For instance, a customer that placed a large order in one period could subsequently experience a downturn in business and, as a result, could cancel an order or reduce the amount of products it purchases from us in future periods.

A delay in a shipment near the end of a reporting period due to rescheduling or cancellation by customers or unexpected production delays experienced by us may cause revenue in the period to decline significantly and may have a material adverse effect on our operations for that period.

We cannot predict how the market will react to new products introduced by us or to enhancements made to our existing products. If any of our new or enhanced products contain defects or perceived defects or have reliability, quality or compatibility problems or perceived problems, or if our competitors release similar products or enhancements at the same time that are more widely accepted by our customers, our revenue and results of operations for one or more reporting periods could be adversely affected.

In addition, we or our competitors may raise or lower the prices of products in response to market demands or competitive pressures. If we lower the prices of our products, or if our competitors lower the prices of their products such that demand for our products weakens, our revenue for one or more quarters may decline and our operating results would be adversely affected.  Changes in foreign currency exchange rates can also cause significant fluctuations in our results of operations from quarter to quarter.

As a result of these factors, our results of operations for any quarter are not necessarily indicative of results to be expected in future periods.

If we experience a significant disruption in, or breach in security of, our information technology systems, our business may be adversely affected.

We rely on information technology systems throughout the Company to manage orders, process shipments to customers, manage inventory levels and maintain financial information. Certain events could result in the disruption of our systems, including power outages, computer attacks by hackers, viruses, catastrophes, hardware and software failures and other unforeseen events. If we were to experience a significant period of system disruption in information technology systems that involve our interactions with customers or suppliers, it could result in the loss of revenue and customers and significant incremental costs, which could adversely affect our business. In addition, security breaches of our information technology systems could result in the misappropriation or unauthorized

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disclosure of confidential information belonging to us or to our employees, partners, customers or suppliers, which could result in significant financial or reputational damage to us.

As we transact a portion of our sales, and maintain significant cash balances, in foreign currencies, changes in interest rates, credit ratings or foreign currency rates could have a material adverse effect on our financial position, results of operations, and cash flows.

A portion of our revenue is derived from our European and Asian operations and include transactions in Euros, British Pounds and Japanese Yen, while our products are mainly manufactured in the United States, United Kingdom and China. In the event of a decline in the value of the Euro, Japanese Yen or British Pound, we would typically experience a decline in our revenues and profit margins. If we increase the selling prices on our products sold in Europe and Japan in order to maintain profit margins and recover costs, we may lose customer sales to lower cost competitors.

Additionally, balances maintained in foreign currencies create additional financial exposure to changing currency rates. If foreign currency rates were to change rapidly, we could incur material losses.

Our reliance on international operations in foreign countries subjects us to risks not typically faced by companies operating exclusively in the United States.

During the year ended December 31, 2015, approximately 59% of our revenues from continuing operations were derived from operations and customers outside of the United States. The scope of our international operations subjects us to risks which could materially impact our results of operations, including:

· foreign exchange rate fluctuations;

· increases in shipping costs;

· longer customer payment cycles;

· greater difficulty in collecting accounts receivable;

· use of incompatible systems and equipment;

· problems with staffing and managing foreign operations in diverse cultures;

· protective tariffs;

· trade barriers and export/import controls;

· transportation delays and interruptions;

· increased vulnerability to the theft of, and reduced protection for, intellectual property rights;

· government currency control and restrictions, delays, penalties or required withholdings on repatriation of earnings;

· the impact of recessionary foreign economies; and

· acts of terrorism.

We cannot predict whether the United States or any other country will impose new quotas, tariffs, taxes or other trade barriers upon the importation or exportation of our products or supplies or gauge the effect that new barriers would have on our financial position or results of operations.

We also are subject to risks that our operations outside the United States could be conducted by our employees, contractors, service providers, representatives or agents in ways that violate the Foreign Corrupt Practices Act or other similar anti-bribery laws. Any such violations could have a negative impact on our business and could result in government investigations and/or injunctive, monetary or other penalties. Moreover, we face additional risks that our anti-bribery policy and procedures may be violated by third-party sales representatives or other agents that help sell our products or provide other services, because such representatives or agents are not our employees and it may be more difficult to oversee their conduct.

Increased outsourcing of components manufacturing to manufacturers outside the United States leads to additional risks which could negatively impact our business.

We are increasingly outsourcing the manufacture of subassemblies to suppliers based in China and elsewhere overseas in order to reduce our manufacturing cost. However, economic, political or trade problems with foreign countries could substantially impact our

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ability to obtain critical parts needed in the timely manufacture of our products. Additionally, this practice increases our vulnerability to the theft of, and reduced protection for, our intellectual property.

Our global operations are subject to extensive and complex import and export rules that vary among the legal jurisdictions in which we operate. Failure to comply with these rules could result in substantial penalties.

Due to the international scope of our operations, we are subject to a complex system of import and export related laws and regulations, including U.S. export control and customs regulations and customs regulations of other countries. These regulations are complex and vary among the legal jurisdictions in which we operate. Any alleged or actual failure to comply with such regulations may subject us to government scrutiny, investigation and civil and criminal penalties, and may limit our ability to import or export our products or to provide services outside the United States. Any of these penalties could have a material impact on our financial position, results of operations and cash flows.

Others may violate our intellectual property rights and cause us to incur significant costs to protect our rights.

Our future success depends in part upon our intellectual property rights, including trade secrets, know-how and continuing technological innovation. We do not have personnel dedicated to the oversight, organization and management of our intellectual property. There can be no assurance that the steps we take to protect our intellectual property rights will be adequate to prevent misappropriation or disclosure. It is possible that, despite our efforts, other parties may use, obtain or try to copy our technology and products. There can be no assurance that other companies are not investigating or developing other technologies that are similar to ours, that any patents will be issued from any application filed by us or that, if patents are issued, the claims allowed will be sufficient to deter or prohibit others from marketing similar products. In addition, our patents may be challenged, invalidated or circumvented in a legal or administrative proceeding. Policing unauthorized use of our intellectual property rights is difficult and time consuming and may involve initiating claims or litigation against third parties for infringement of our proprietary rights, which could be costly.

Our efforts to protect our intellectual property rights against infringement may not be effective in some foreign countries where we operate or sell our products. If we fail to adequately protect our intellectual property in these countries, we may lose significant business to our competitors.

Our operating results would suffer if we are unable to successfully defend against claims of infringement by third parties.

We have received in the past, and could receive in the future, notices from third parties alleging that our products infringe patent or other proprietary rights. These allegations could result in significant costs and diversion of the attention of management. In the event that any third party makes a valid claim against us or our customers and a license is not available to us on commercially reasonable terms, our operating results would be adversely affected. Adverse consequences may also apply if we fail to avoid litigation for infringement or misappropriation of proprietary rights of third parties. If a successful claim were brought against us and we are found to infringe a third party’s intellectual property rights, we could be required to pay substantial amounts for damages or be enjoined from using the technology deemed to be infringing, or from using, making or selling products deemed to be infringing. If we have supplied infringing products to third parties, we may be obligated to indemnify these third parties for any damages that they may be required to pay to the patent holder and for any losses that they may sustain as a result of the infringement.

We operate in highly competitive industries and, if we lose competitive advantages, our business would suffer adverse consequences.

Some of our competition comes from established competitors that have greater financial, engineering, manufacturing and marketing resources than we do. Our competitors will continue to improve the design and performance of their existing products and introduce new products. It is possible that we may not successfully differentiate our current and proposed products from the products of our competitors, or that the marketplace will not consider our products to be superior to competing products. To remain competitive, we will be required to invest heavily in research and development, marketing and customer service and support. However, we may not be able to make the necessary technological advances to maintain our competitive position and our products may not receive market acceptance. These factors would cause us not to be able to compete successfully in the future. Increased competition may also result in price reductions, reduced profit margins, loss of market share and an inability to generate cash flows that are sufficient to maintain or expand our development of new products.

Our results of operations will be adversely affected if we fail to successfully integrate future acquisitions into our business or to grow the acquired businesses.

As part of our business strategy, we expect to broaden our product and service offerings by acquiring businesses, technologies, assets and product lines that, we believe, complement or expand our existing businesses. We have made, and expect to continue to

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make, acquisitions. We may fail to successfully integrate acquisitions into our business and, as a result, may fail to realize the synergies, cost savings and other benefits expected from acquisitions. If we are not able to successfully achieve these objectives, the anticipated benefits of such acquisitions may not be realized fully or at all, and our results of operations could be adversely affected.

Further, our ability to maintain and increase profitability of an acquired business will depend on our ability to manage and control operating expenses and to generate and sustain increased levels of revenue. Our expectations to achieve more consistent and predictable levels of revenue and to increase profitability as a result of any acquisition may not be realized. Such revenues and profitability may even decline as we integrate operations into our business. If revenues of acquired businesses grow more slowly than we anticipate or decline, or if their operating expenses are higher than we expect, we may not be able to sustain or increase their profitability, in which case our financial condition will suffer and our stock price could decline. For example, reductions in orders by a customer within our Visualization Solutions product line have caused our revenues in that business in 2013, 2014 and 2015 to be lower than we had expected when we acquired the business. Moreover, our acquisition activities may divert management’s attention from our regular operations. Managing a larger and more geographically dispersed operation and product portfolio could also pose challenges for our management team. In addition, through our acquisitions, we may assume liabilities, losses or costs for which we are not indemnified or insured or for which our indemnity or insurance is inadequate. Any such liabilities may have a material adverse effect on our financial position or results of operations.

Our business strategy may include making strategic divestitures. There can be no assurance that any divestitures will provide business benefit.

Our business strategy includes divesting certain non-core businesses. We sold certain assets and liabilities of our Laser Systems businesses in October 2012, our Semiconductor Systems business in May 2013, our Scientific Lasers business in July 2014, and our JK Lasers business in April 2015. There may be additional sales of other non-core businesses in the future. The divestiture of an existing business could reduce our future profits and operating cash flows and make our financial results more volatile. A divestiture could also cause a decline in the price of our common shares and increased reliance on other elements of our core business operations. If we do not successfully manage the risks associated with a divestiture, our business, financial condition, and results of operations could be adversely affected. In addition, there could be other negative unforeseen effects from a divestiture. We also may not find suitable purchasers for our non-core businesses and may continue to pay operating costs associated with these businesses. Failed attempts to divest non-core businesses may distract management’s attention from other business activities, erode employee morale and customers’ confidence, and harm our business.

If we do not attract and retain our key personnel, our ability to execute our business strategy will be limited.

Our success depends, to a significant extent, upon the continued service of our executive officers, key management and technical personnel, particularly our experienced engineers, and upon our ability to continue to attract, retain, and motivate qualified personnel. The competition for these employees is intense. The loss of the services of one or more of our key personnel could have a material adverse effect on our operating results. In addition, there could be a material adverse effect on us should the turnover rates for engineers and other key personnel increase significantly or if we are unable to continue to attract qualified personnel.

Our success also depends on our ability to execute leadership succession plans. The inability to successfully transition key management roles could have a material adverse effect on our operating results.

We have undertaken restructuring and realignment activities in the past, and we will continue to assess our operating structure in the future. These actions may not improve our financial position, and may ultimately prove detrimental to our operations and sales.

We have undertaken restructuring and realignment activities in the past, and we will continue to assess our operating structure in the future. Our ability to reduce operating expenses is dependent upon the nature of the actions we take to reduce expenses and our subsequent ability to implement those actions and realize expected cost savings. We may need to take additional restructuring actions, such as eliminating or consolidating certain of our facilities, reducing our headcount, or eliminating certain positions for a variety of reasons, including deterioration in global economic conditions or significant declines in demand for our products. Failure to successfully implement such restructuring activities could adversely affect our ability to meet customer demand for our products and could increase the cost of production versus our projections, both of which could adversely impact our operating results. Further, expenses and cost inefficiencies associated with our restructuring activities, including severance costs and the loss of trained employees with knowledge of our business and operations, could exceed our expectations and negatively impact our financial results. The elimination or consolidation of operations could also result in restructuring charges that would adversely affect our results of operations and financial condition.

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Product defects or problems with integrating our products with other vendors’ products may seriously harm our business and reputation.

We produce complex products that can contain latent defects or performance problems. This could happen to both existing and new products. Such defects or performance problems could be detrimental to our business and reputation.

In addition, customers frequently integrate our products with other vendors’ products. When problems occur in a combined environment, it may be difficult to identify the source of the problem. These problems may cause us to incur significant warranty and repair costs, divert the attention of our engineering personnel from our product development efforts, and cause significant customer relationship issues.

Disruptions in the supply of certain key components and other goods from our suppliers, including limited or single source suppliers, could have an adverse effect on the results of our business operations, and could damage our relationships with customers.

The production of our products requires a wide variety of raw materials, key components and other goods that are generally available from alternate sources of supply. However, certain critical raw materials, key components and other goods required for the production and sale of some of our principal products are available from limited or single sources of supply. If the receipt of certain limited source or single source materials is delayed, our relationship with customers may be harmed if such delays cause us to miss our scheduled shipment deadlines. Certain of our businesses buy components, including limited or sole source items, from competitors of our other businesses, and certain of our businesses sell products to customers that compete with certain other segments of our business. This dynamic may adversely impact our relationship with these suppliers and customers. For example, these suppliers could increase the price of those components or reduce their supply of those components to us. Similarly, these customers could elect to manufacture products to meet their own requirements rather than purchasing products from us. Our businesses may be adversely affected by our other business relationships with customers and suppliers. Our current or alternative sources may not be able to continue to meet all of our demands on a timely basis. If suppliers or subcontractors experience difficulties or fail to meet any of our manufacturing requirements, our business would be harmed until we are able to secure alternative sources, if any, on commercially reasonable terms. A prolonged inability to obtain certain raw materials, key components or other goods is possible and could have a significant adverse effect on our business operations, and could damage our relationships with customers.

Production difficulties and product delivery delays or disruptions could have a material adverse effect on our business.

We assemble our products at our facilities in the United States, the United Kingdom and China. Each of our products is typically manufactured in a single manufacturing location. If production activities at any of our manufacturing facilities were disrupted by a natural disaster or otherwise, our operations would be negatively impacted until we could establish alternative production and service operations. Significant production difficulties could be the result of:

· mistakes made while transferring manufacturing processes between locations;

· changing process technologies;

· ramping production;

· installing new equipment at our manufacturing facilities;

· implementing new information technology systems;

· shortage of key components; and

· loss of electricity or employees’ access to the manufacturing facilities due to natural disasters.

In addition, we may experience product delivery delays in the future. We ship a significant portion of our products to our customers through independent package delivery and import/export companies. We also ship our products through national trucking firms, overnight carrier services and local delivery practices. If one or more of the package delivery or import/export providers experience significant disruption in services or institutes a significant price increase, the delivery of our products could be disrupted or delayed. Such events could cause us to incur increased shipping costs that could not be passed on to our customers, negatively impacting our profitability and our relationships with customers.

We are subject to regulations by various federal, state and foreign agencies that require us to comply with a wide variety of regulations, including those regarding the manufacture of products and the shipping of our products.

Certain medical devices that we manufacture are subject to regulations by the U.S. Food and Drug Administration and similar international agencies. These regulations govern a wide variety of product activities, from design and development to labeling,

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manufacturing, promotion, sales and distribution. If we fail to comply with such regulations, we may have to recall products and cease their manufacture and distribution, which would increase our costs and reduce our revenues.

In recent years, the medical industry has undergone significant changes in order to reduce healthcare costs. This includes cuts in Medicare, consolidation of healthcare distribution companies and collective purchasing arrangements by office-based healthcare practitioners. Foreign and domestic governments have also undertaken efforts to control healthcare costs through legislation and regulation. In March 2010, President Obama signed into law health care reform legislation in the form of the U.S. Patient Protection and Affordable Care Act (the “PPACA”). Many of the impacts of the PPACA will not be known until those regulations are enacted over the next several years. The implementation of health care reform and medical cost containment measures in the U.S. and in foreign countries in which we operate could:

· decrease the price that we might establish for our products, which would result in lower product revenues to us;

· require additional safety monitoring, labeling changes, restrictions on product distribution or use, or other measures after the introduction of our products to market, which could increase our costs of doing business, or otherwise adversely affect the market for our products; and

· create new laws, regulations and judicial decisions affecting pricing or marketing practices.

Changes in governmental regulation of our business or our products could reduce demand for our products or increase our expenses.

We are subject to many governmental regulations, including but not limited to the laser radiation safety regulations of the Radiation Control for Health and Safety Act administered by the National Center for Devices and Radiological Health, a branch of the U.S. Food and Drug Administration, and certain health regulations related to the manufacture of products using beryllium, an element used in some of our products. Among other things, these regulations require us to file annual reports, to maintain quality control and sales records, to perform product testing, to distribute appropriate operating manuals, to conduct safety reviews, to incorporate design and operating features in products sold to end-users and to certify and label our products. Depending on the class of the product, various warning labels must be affixed and certain protective devices must be installed.

We are also subject to regulatory oversight, including comparable enforcement remedies, in the markets we serve. We compete in many markets in which we and our customers must comply with federal, state, local and international regulations, such as environmental, health and safety and food and drug regulations. We develop, configure and market our products to meet customer needs created by those regulations. Any significant change in these regulations could reduce demand for our products or increase our expenses, which in turn could adversely affect our business, financial condition, results of operations and cash flows.

Conflict minerals regulations will cause us to incur additional expenses and could limit the supply and increase the cost of certain metals used in manufacturing our products.

In August 2012, the Securities and Exchange Commission adopted rules requiring disclosures by public companies concerning tin, tantalum, tungsten and gold (collectively known as “conflict minerals”) that are necessary to the functionality or production of products manufactured or contracted to be manufactured. The rules require companies to perform due diligence, disclose and report whether or not such minerals originate from the Democratic Republic of Congo or any of the adjoining countries. There are, and will be, costs associated with complying with the disclosure requirements, such as costs related to determining the source of certain minerals used in our products, as well as costs of possible changes to processes or sources of supply as a consequence of such verification activities. As our supply chain is complex, we may not be able to sufficiently verify the origins of the relevant minerals used in our products through the due diligence procedures that we implement, which may harm our reputation. In addition, we may encounter challenges to satisfy those customers who require that all of the components of our products be certified as conflict-free, which could place us at a competitive disadvantage if we are unable to do so.

Compliance or the failure to comply with current and future environmental regulations could cause us significant expense.

Our operations are subject to a variety of federal, state, local and international environmental regulations relating to the use, storage, discharge and disposal of hazardous chemicals used during our manufacturing process or requiring design changes or recycling of products we manufacture. We are subject to the federal regulation of the Environmental Protection Agency in the United States and comparable authorities in other countries. If we fail to comply with any present or future regulations, we could be subject to regulatory fines.

Future developments, administrative actions or liabilities relating to environmental matters could have a material adverse effect on our business, results of operations or financial condition. It is difficult to anticipate how such regulations will be implemented and enforced. We continue to evaluate the necessary steps for compliance with regulations as they are enacted. Certain regulations may

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require us to re-design our products to ensure compliance with the applicable standards. These redesigns may adversely affect the performance of our products, add greater testing lead-times for product introductions and reduce our profitability.

If we fail to implement new information technology systems successfully, our business could be adversely affected.

We rely on various centralized information systems throughout the Company to keep financial records, process orders, manage inventory, process shipments to customers, and operate other critical functions. We are in the process of upgrading our information technology infrastructure, including implementing new enterprise resource planning (ERP) systems and other complementary information technology systems. We have invested, and will continue to invest, significant capital and human resources in the upgrades and new ERP systems. Any disruptions, delays or deficiencies in the transition, design and implementation of the upgrades and new ERP systems, particularly any disruptions, delays or deficiencies that impact our operations, could have a material adverse effect on our results of operations and cash flows.

We may experience difficulties as we transition to these new upgraded systems and processes, including loss of data and the ability to process customer orders, ship products, provide services and support to our customers, bill and track our customers, fulfill contractual obligations, conduct financial reporting and file SEC reports in a timely manner, or otherwise run our business. We may also experience decreases in productivity as our personnel implement these systems and become familiar with the new systems. In addition, as we are dependent upon our ability to gather and promptly transmit accurate information to key decision makers, our business, results of operations and financial condition may be materially and adversely affected if our information technology infrastructure does not allow us to transmit accurate information, even for a short period of time. Furthermore, the transition, design and implementation of upgrades and new ERP systems may be much more costly than we anticipated.

Our results of operations will be adversely affected if we fail to realize the full value of our intangible assets.

As of December 31, 2015, our total assets included $169.7 million of net intangible assets, including goodwill. Net intangible assets consist principally of goodwill, customer relationships, patents, trademarks, core technologies and technology licenses. Goodwill and indefinite-lived intangible assets are tested for impairment at least on an annual basis. All other intangible assets are evaluated for impairment should discrete events occur that call into question the recoverability of the intangible assets.

Adverse changes in our business, adverse changes in the assumptions used to determine the fair value of our reporting units, or the failure to grow our businesses may result in an impairment of our intangible assets, which could adversely affect our results of operations. For example, the Company recorded a non-cash impairment charge of $41.4 million in the consolidated financial statements for the year ended December 31, 2014 as a result of lower expectations for revenue and operating profit from our NDS business.

We are exposed to the credit risk of some of our customers and to credit exposures in weakened markets, which could adversely affect our results of operations.

Customers with liquidity issues may lead to additional bad debt expense. There can be no assurance that our open credit customers will pay the amounts they owe to us or that the reserves we maintain will be adequate to cover such credit exposures. In addition, to the extent that turmoil in the credit markets makes it more difficult for some customers to obtain financing, their ability to pay may be adversely impacted. Our customers’ failure to pay and/or our failure to maintain sufficient reserves could have a material adverse effect on our future operating results and financial condition.

Our reliance upon third party distribution channels subjects us to credit, inventory, business concentration, and business failure risks beyond our control.

We sell many of our products through resellers, distributors, and system integrators. As these third parties tend to have more limited financial resources than OEM and end-user customers, they generally represent sources of increased credit risk. Any downturn in the business of our resellers, distributors, and systems integrators would in turn harm our results of operations and financial condition.

Our sales also depend upon the ability of our OEM customers to develop and sell systems that incorporate our products. Adverse economic conditions, large inventory positions, limited marketing resources and other factors influencing these OEM customers could have a substantial adverse effect on our financial results. We cannot assure investors that our OEM customers will not experience financial or other difficulties that could adversely affect their operations and, in turn, adversely affect our results of operations and financial condition.

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Risks Relating to Taxes

Tax audits by tax authorities could adversely affect future results.

We are subject to regular examination of our income tax returns by the Internal Revenue Service (“IRS”) and other tax authorities. We regularly assess the likelihood of favorable or unfavorable outcomes resulting from these examinations to determine the adequacy of our provision for income taxes. Although we believe our tax estimates are reasonable, there can be no assurance that any final determination will not be materially different than the treatment reflected in our historical income tax provisions and accruals, which could materially and adversely affect our financial condition, net income and earnings per share.

Our effective tax rate is subject to fluctuation, which could impact our financial position and earnings per share.

Our effective tax rate is subject to fluctuation as the effective income tax rate for each year is a function of (a) taxable income levels in numerous tax jurisdictions, (b) our ability to utilize recorded deferred tax assets, (c) taxes, interest, or penalties resulting from tax audits and, (d) credits and deductions as a percentage of total taxable income. From time to time, the United States, foreign and state governments make substantive changes to tax rules where significant judgment is required to determine the impact of such changes on our provision for income taxes. Further, such tax law changes may cause our effective tax rate to fluctuate between periods.

We may be subject to U.S. federal income taxation even though GSIG is a non-U.S. corporation.

GSI Group, Inc. is a holding company organized in Canada and is subject to Canadian tax laws. However, we are subject to U.S. tax rules and file U.S. federal income tax returns for our operations in the United States. In addition, distributions or payments from entities in one jurisdiction to entities in another jurisdiction may be subject to withholding taxes. We do not intend to operate in a manner that will cause GSI Group, Inc. to be treated as engaged in a U.S. trade or business or otherwise be subject to U.S. federal income taxes on its income, but it generally will be subject to U.S. federal withholding tax on certain U.S.-sourced passive income items, such as dividends and certain types of interest.

Risks Relating to Our Common Shares and Our Capital Structure

We may require additional capital to adequately respond to business challenges or opportunities and repay or refinance our existing indebtedness, and this capital may not be available on acceptable terms or at all.

We may require additional capital to adequately respond to future business challenges or opportunities, including, but not limited to, the need to develop new products or enhance our existing products, maintaining or expanding research and development projects, the need to build inventory or to invest other cash to support business growth, and opportunities to acquire complementary businesses and technologies.

As of December 31, 2015, we had outstanding debt of $97.5 million under the amended and restated senior secured credit agreement (the “Amended and Restated Credit Agreement”) and $105.0 million available to be drawn under the revolving credit facility. If we are unable to satisfy the conditions in the Amended and Restated Credit Agreement or our needs exceed the amounts available under the revolving credit facility, we may need to engage in equity or debt financings to obtain additional funds. If we raise additional funds through further issuances of equity or convertible debt securities, our existing shareholders could suffer significant dilution. Any new equity securities we issue could have rights, preferences and privileges superior to those of the holders of our common shares. Further, our Amended and Restated Credit Agreement restricts our ability to obtain additional debt financing from other sources. If we are unable to obtain adequate financing or obtain financing on terms satisfactory to us when we require it, our ability to continue to support our business growth and to respond to business challenges could be significantly limited. In addition, the terms of any additional equity or debt issuances may adversely affect the value and price of our common shares.

Global credit conditions have varied widely over the last several years and could continue to vary significantly in the future. Although these conditions have not affected our current plans, adverse credit conditions in the future could have a negative impact on our ability to execute on future strategic activities.

The market price for our common shares may be volatile.

The market price of our common shares could be subject to wide fluctuations. These fluctuations could be caused by:

· quarterly variations in our results of operations;

· changes in earnings estimates by analysts;

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· conditions in the markets we serve; or  

· general market or economic conditions.

In addition, the stock market has experienced extreme price and volume fluctuations in recent years. These fluctuations have had a substantial effect on the market prices of many companies, often unrelated to the operating performance of the specific companies. These market fluctuations could adversely affect the price of our common shares.

We may not have access to the cash flow and other assets of our subsidiaries that may be needed to service our indebtedness and fund our operations.

Although much of our business is conducted through our subsidiaries, none of our subsidiaries are obligated to make funds available to us. Local laws and regulations and/or the terms of our indebtedness may restrict certain of our subsidiaries from paying dividends and otherwise transferring assets to us. We cannot assure you that applicable laws and regulations and/or the terms of our indebtedness will permit our subsidiaries to provide us with sufficient dividends, distributions or loans when necessary. Therefore, our ability to make payments on our indebtedness and fund our operations may be adversely affected if our subsidiaries cannot distribute funds to us.

Certain significant shareholders could have substantial influence over our Board of Directors and our outstanding common shares, which could limit our other shareholders’ ability to influence the outcome of key transactions.

Our largest shareholders and their respective affiliates, in the aggregate, beneficially own a substantial amount of our outstanding common shares. As a result, these shareholders may be able to influence matters requiring approval by our shareholders, including the election of directors and the approval of mergers, or other extraordinary transactions. One of these shareholders also serves on our Board of Directors and therefore could have a substantial influence over our Board of Directors. These significant shareholders may have interests that differ from other shareholders and may vote in a way that may be adverse to the interests of other shareholders.

Certain provisions of our articles of incorporation may delay or prevent a change in control of the Company.

Our corporate documents and our existence as a corporation under the laws of New Brunswick subject us to provisions of Canadian law that may enable our Board of Directors to resist a change in control of the Company. These provisions include:

· limitations on persons authorized to call a special meeting of shareholders;

· the ability to issue an unlimited number of common shares; and

· advance notice procedures required for stockholders to nominate candidates for election as directors or to bring matters before an annual meeting of shareholders.

These anti-takeover defenses could discourage, delay or prevent a transaction involving a change in control of the Company. These provisions could also discourage proxy contests and make it more difficult for shareholders to elect directors of their choosing and cause us to take other corporate actions that shareholders desire. In addition, New Brunswick law provides that cumulative voting is mandatory in director elections which can result in stockholders holding less than a majority of shares being able to elect persons to the Board of Directors and prevent a majority stockholder from controlling the election of all of the directors.

Our existing indebtedness could adversely affect our future business, financial condition and results of operations.

As of December 31, 2015, we had $97.5 million of outstanding debt. This level of debt could have significant consequences on our future operations, including:

· reducing the availability of our cash flow to fund working capital, capital expenditures, research and development efforts, acquisitions and other general corporate purposes, and limiting our ability to obtain additional financing for these purposes;

· limiting our flexibility in planning for or reacting to, and increasing our vulnerability to, changes in our business, market changes in the industries in which we operate and the general economy; and

· placing us at a competitive disadvantage compared to our competitors that have less debt or are less leveraged.

Any of the above-listed factors could have an adverse effect on our business, financial condition and results of operations.

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In addition, our Amended and Restated Credit Agreement contains covenants that will limit our ability to engage in activities that may be in our long-term best interests. Our failure to comply with those covenants could result in an event of default which, if not cured or waived, could result in the acceleration of all of our borrowings thereunder.

Risks Relating to Our Internal Controls

If we fail to maintain appropriate internal controls in the future, we may not be able to report our financial results accurately, which may adversely affect our stock price and our business.

While our management and our independent registered public accounting firm concluded that our internal control over financial reporting was effective as of December 31, 2015, it is possible that material weaknesses may be identified in the future.

If we are unable to maintain effective internal controls, we may not have adequate, accurate or timely financial information, and we may be unable to meet our reporting obligations as a publicly traded company or comply with the requirements of the SEC or the Sarbanes-Oxley Act of 2002. This could result in a restatement of our financial statements, the imposition of sanctions, including the inability of registered broker dealers to make a market in our common shares, or investigation by regulatory authorities. Any such action or other negative results caused by our inability to meet our reporting requirements or to comply with legal and regulatory requirements or by disclosure of an accounting, reporting or control issue could adversely affect the trading price of our securities and our business. Material weaknesses in our internal control over financial reporting could also reduce our ability to obtain financing or could increase the cost of any financing we obtain.

As part of our growth strategy, we may make additional acquisitions of privately held businesses. Prior to becoming part of our consolidated company, the acquired business would not be required to implement or maintain the disclosure controls and procedures or internal control over financial reporting that are required of public companies. We are required to integrate the acquired businesses into our consolidated company’s system of disclosure controls and procedures and internal control over financial reporting, but we cannot provide assurance as to how long the integration process may take for our recently acquired business or any business that we may acquire in the future. Additionally, we may need to improve our internal control or those of any business we acquire and may be required to design enhanced processes and controls in order to make such improvements. This could result in significant costs to us and could require us to divert substantial resources, including management time, from other activities.

Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

The principal owned and leased properties of the Company and its subsidiaries as of December 31, 2015 are listed in the table below.

Location	Principal Use	Current Segment (a)	Approximate Square Feet	Owned/Leased
Bedford, Massachusetts, USA	Manufacturing, R&D, Marketing, Sales and Administration	1,2,3,4	147,000	Leased; expires in 2019
San Jose, California, USA	Manufacturing, R&D, Marketing, Sales and Administration	2	73,000	Leased; expires in 2019
Mukilteo, Washington, USA	Manufacturing, R&D, Marketing, Sales and Administration	1	63,000	Owned
North Syracuse, New York, USA	Manufacturing, R&D, Marketing, Sales and Administration	2	55,000	Leased; expires in 2029
Suzhou, People’s Republic of China	Manufacturing, R&D, Marketing, Sales and Administration	1,2,3	55,000	Leased; expires in 2018
Poole, United Kingdom	Manufacturing, R&D, Marketing, Sales and Administration	3	51,000	Building owned; land leased through 2078
Phoenix, Arizona, USA	Manufacturing, R&D, Marketing, Sales and Administration	1	31,000	Owned
Chatsworth, California, USA	Manufacturing, R&D, Marketing, Sales and Administration	2	22,000	Owned

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Location	Principal Use	Current Segment (a)	Approximate Square Feet	Owned/Leased
Taunton, United Kingdom	Manufacturing, R&D, Marketing and Sales	1	19,000	Leased; expires in 2017

a) The facilities house product lines that belong to the following segments:

1 — Laser Products Segment

2 — Vision Technologies Segment

3 — Precision Motion Segment

4 — Corporate

In connection with our senior credit facility, we entered into open ended deeds of trust for our properties in Orlando, Florida, Chatsworth, California and Mukilteo, Washington.

A portion of our leased facility in San Jose, California is currently underutilized. As of December 31, 2015, the Company was in process of exiting a portion of this facility.

Additional research and development, sales, service and logistics sites are located in Colorado (U.S.); Munich, Germany; the Breda and Zevenhuizen, the Netherlands; Tokyo, Japan; Beijing, China; Monza, Italy and Sri Lanka. These additional offices are leased facilities occupying approximately 90,000 square feet in the aggregate, and are related to our Laser Products, Vision Technologies and Precision Motion segments. As of December 31, 2015, the Company was in the process of exiting leased facilities in Zevenhuizen, Netherlands totaling 18,300 square feet and Sri Lanka totaling 6,500 square feet. The Company will need to continue to pay for the leased facilities in Zevenhuizen, Netherlands until November 2017 and Sri Lanka until March 2016.

Our owned facility in Orlando, Florida and our leased facilities in Lexington, Massachusetts were restructured and are not in use by the Company. These owned and leased facilities constitute approximately 80,000 and 33,000 square feet, respectively. In May 2013, we entered into a sublease agreement for our Lexington facility through December 2016.

In connection with the sale of our Scientific Lasers business, we assigned to the buyer the lease for a facility in California, where the Scientific Lasers business operated. The buyer assumed all of our rights and obligations under the original lease, including the duty to pay the rent for the remainder term of the lease. So long as the buyer performs its obligations as the tenant, as required by the Asset and Equity Purchase Agreement for its acquisition of the Scientific Lasers business, the Company has no responsibilities for the lease. Should the buyer cease performance under the lease, however, the landlord could still pursue the Company as the original tenant until February 28, 2019, the end of the lease term. The Company has indemnification rights against the buyer under the Asset and Equity Purchase Agreement for such buyer’s default.

Item 3. Legal Proceedings

The Company is subject to various legal proceedings and claims that arise in the ordinary course of business. The Company does not believe that the outcome of these claims will have a material adverse effect upon its financial condition or results of operations but there can be no assurance that any such claims, or any similar claims, would not have a material adverse effect upon its financial condition or results of operations.

Item 4. Mine Safety Disclosures

Not applicable.

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PART II

Item 5. Market for Registrant’s Common Shares, Related Stockholder Matters and Issuer Purchases of Equity Securities

Market Information

The Company’s common shares, no par value, are traded on the NASDAQ Global Select Market under the trading symbol “GSIG”. The following table sets forth the high and low prices of the Company’s common shares during the periods indicated.

	2015				2014
	High		Low		High		Low
First Quarter	$	14.47	$	12.27	$	13.05	$	10.33
Second Quarter	$	15.75	$	13.15	$	13.60	$	11.92
Third Quarter	$	15.05	$	12.08	$	12.97	$	11.29
Fourth Quarter	$	14.59	$	12.81	$	14.87	$	11.15

Holders

As of the close of business on February 26, 2016, there were approximately 36 holders of record of the Company’s common shares. Since many of the common shares are registered in “nominee” or “street” names, the Company believes that the total number of beneficial owners is considerably higher.

Dividend Policy

The Company has never declared or paid cash dividends on its common shares and does not anticipate paying any cash dividends in the foreseeable future.

Purchases of Equity Securities by the Issuer and Affiliated Purchaser

In October 2013, the Company’s Board of Directors authorized a share repurchase plan for the repurchase of up to an aggregate of $10.0 million of the Company’s common stock. The share repurchase plan does not obligate the Company to acquire any particular amount of our common stock. No time limit was set for the completion of the share repurchase program, and the program may be suspended or discontinued at any time.

The following table sets forth certain information with respect to repurchases of the Company’s common stock for the periods indicated.

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs(1)		Approximate Dollar Value that May Yet Be Purchased Under the Plans or Programs
October 3 - October 30, 2015		—	$	—		—	$	8,477,236
October 31 - November 27, 2015		45,923	$	13.71		45,923	$	7,847,481
November 27 - December 31, 2015		—	$	—		—	$	7,847,481
Total		45,923	$	13.71		45,923
(1) The Company has repurchased 172,423 shares of its common stock pursuant to the share repurchase program since its adoption.

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Performance Graph

The following graph compares the cumulative total return to stockholders for the Company’s common shares for the period from December 31, 2010 through December 31, 2015 with the NASDAQ Composite Index, the S&P Technology Index and the Russell 2000 Index. The comparison assumes an investment of $100 is made on December 31, 2010 in the Company’s common shares and in each of the indices and, in the case of the indices, it also assumes reinvestment of all dividends. The performance shown is not necessarily indicative of future performance.

The Company intends to remove the S&P Technology Index as its comparable published industry index due to a shift in the Company’s business, primarily an increase in medical market revenues. The Company’s revenues to medical end markets represented approximately 40% of total revenues for the year ended December 31, 2015. For comparative and historical purposes, the Company has included the total returns and performance of the S&P Technology Index in the table below.  

	December 31, 2010		December 31, 2011		December 31, 2012		December 31, 2013		December 31, 2014		December 31, 2015
GSI Group Inc.	$	100.00	$	96.69	$	81.85	$	106.24	$	139.13	$	128.73
NASDAQ Composite Index	$	100.00	$	99.17	$	116.48	$	163.21	$	187.27	$	200.31
S&P Technology Index (1)	$	100.00	$	95.59	$	109.59	$	135.61	$	154.48	$	158.78
Russell 2000 Index (2)	$	100.00	$	95.82	$	111.49	$	154.78	$	162.35	$	155.18

(1) The S&P 500 Information Technology Index is proprietary to and is calculated, distributed and marketed by S&P Opco, LLC (a subsidiary of S&P Dow Jones Indices LLC), its affiliates and/or its licensors and has been licensed for use.  S&P® and S&P 500®, among other famous marks, are registered trademarks of Standard & Poor’s Financial Services LLC, and Dow Jones® is a registered trademark of Dow Jones Trademark Holdings LLC. © 2013 S&P Dow Jones Indices LLC, its affiliates and/or its licensors. All rights reserved.

(2) Copyright © Russell Investments 2015. All rights reserved.

Item 6. Selected Financial Data

The selected financial data set forth below is not necessarily indicative of results of future operations, and should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Item 7 and the

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consolidated financial statements and related notes thereto in Item 8 of this Annual Report on Form 10-K to fully understand factors that may affect the comparability of the information presented below. The selected consolidated financial data in this section is not intended to replace the consolidated financial statements.

The consolidated statements of operations data for the years ended December 31, 2015, 2014 and 2013 and the consolidated balance sheet data as of December 31, 2015 and 2014 are derived from our audited consolidated financial statements in this Annual Report on Form 10-K. The consolidated statements of operations data for the years ended December 31, 2012 and 2011 and the consolidated balance sheet data as of December 31, 2013, 2012 and 2011 are derived from our audited consolidated financial statements that are not included in this Annual Report on Form 10-K.

	Year  Ended December 31,
	2015			2014			2013			2012			2011
	(In thousands, except per share data)
Consolidated Statements of Operations Data:
Revenue	$	373,598		$	364,706		$	316,910		$	243,796		$	269,697
Gross profit		157,890			150,167			132,227			105,518			119,559
Operating expenses (1)		128,957			166,973			112,781			85,256			81,213
Operating income (loss) from continuing operations (1)		28,933			(16,806	)		19,446			20,262			38,346
Income (loss) from continuing operations before income taxes (1) (2)		46,022			(17,915	)		16,177			16,702			26,553
Income tax provision (benefit) (3)		10,394			(1,006	)		6,200			(11,595	)		2,136
Income (loss) from continuing operations		35,628			(16,909	)		9,977			28,297			24,417
Income (loss) from discontinued operations, net of tax		(13	)		(5,607	)		(2,054	)		(10,974	)		4,584
Gain (loss) on disposal of discontinued operations, net of tax (4)		—			(1,726	)		(592	)		2,255			—
Consolidated net income (loss)		35,615			(24,242	)		7,331			19,578			29,001
Less: Net income attributable to noncontrolling interest		—			(10	)		(22	)		(40	)		(28	)
Net income (loss) attributable to GSI Group Inc.	$	35,615		$	(24,252	)	$	7,309		$	19,538		$	28,973
Earnings (loss) per common share from continuing operations:
Basic	$	1.03		$	(0.49	)	$	0.29		$	0.84		$	0.73
Diluted	$	1.02		$	(0.49	)	$	0.29		$	0.84		$	0.73
Earnings (loss) per common share from discontinued operations:
Basic	$	(0.00	)	$	(0.21	)	$	(0.08	)	$	(0.26	)	$	0.14
Diluted	$	(0.00	)	$	(0.21	)	$	(0.08	)	$	(0.26	)	$	0.13
Earnings (loss) per common share attributable to GSI Group Inc.:
Basic	$	1.03		$	(0.70	)	$	0.21		$	0.58		$	0.87
Diluted	$	1.02		$	(0.70	)	$	0.21		$	0.58		$	0.86
Weighted average common shares outstanding—basic		34,579			34,352			34,073			33,775			33,481
Weighted average common shares outstanding—diluted		34,827			34,352			34,396			33,936			33,589

(1) The Company recorded an impairment charge of $41.4 million in 2014 related to goodwill ($19.6 million) and intangible assets ($21.8 million) of our NDS business acquired in January 2013.

(2) The Company sold its JK Lasers business in 2015 and recorded a gain on disposal of $19.6 million.

(3) The Company released $15.3 million of valuation allowance on deferred tax assets in 2012 based on the conclusion that it is more likely than not that its deferred tax assets in the U.S. and U.K. would be realized in the future.

(4) The Company sold its Scientific Lasers business in 2014, Semiconductor Systems business in 2013 and Laser Systems business in 2012 and recorded a (loss) gain on disposal, net of tax, of ($1.7) million, ($0.6) million and $2.3 million, respectively.

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	December 31,
	2015		2014		2013		2012		2011
	(in thousands)
Consolidated Balance Sheet Data:
Cash and cash equivalents	$	59,959	$	51,146	$	60,980	$	65,788	$	54,835
Total assets (1)		416,045		396,294		375,916		333,711		345,731
Debt, current (1)		7,385		7,345		7,306		7,270		9,662
Debt, long-term (1)		88,426		105,030		61,303		38,982		55,566
Long-term liabilities, excluding debt		25,965		25,951		10,917		11,308		22,440
Total GSI Group Inc. stockholders’ equity		244,701		210,825		241,984		227,809		209,003

(1) In April 2015, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2015-03, “Simplifying the Presentation of Debt Issuance Costs.” ASU 2015-03 requires debt issuance related costs to be presented in the balance sheet as a direct reduction to the carrying amount of the associated debt liability. The Company adopted the provisions of ASU 2015-03 during 2015. Prior year amounts have been revised to conform to the current year presentation.

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”) should be read in conjunction with the Consolidated Financial Statements and Notes included in Item 8 of this Annual Report on Form 10-K. The MD&A contains certain forward looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. In addition to historical financial information, the following discussion and analysis contains forward looking statements that involve risks, uncertainties and assumptions. These forward looking statements include, but are not limited to, anticipated financial performance; expected liquidity and capitalization; drivers of revenue growth; management’s plans and objectives for future operations, expenditures and product development, and investments in research and development; business prospects; potential of future product releases; anticipated revenue performance; industry trends; market conditions; changes in accounting principles; changes in actual or assumed tax liabilities; expectations regarding tax exposures; anticipated reinvestment of future earnings; anticipated expenditures in regard to the Company’s benefit plans; future acquisitions and dispositions and anticipated benefits from acquisitions; anticipated use of currency hedges; ability to repay our indebtedness; our intentions regarding the use of cash; and other statements that are not historical facts. These forward looking statements are neither promises nor guarantees, but involve risks and uncertainties that may cause actual results to differ materially from those contained in the forward looking statements. Our actual results could differ materially from those anticipated in these forward looking statements as a result of various important factors, including those set forth in Item 1A of this Annual Report on Form 10-K under the heading “Risk Factors.” The words “anticipates,” “believes,” “expects,” “intends,” “future,” “could,” “estimates,” “plans,” “would,” “should,” “potential,” “continues,” and similar words or expressions (as well as other words or expressions referencing future events, conditions or circumstances) identify forward looking statements. Readers should not place undue reliance on any such forward looking statements, which speak only as of the date they are made. Management and the Company disclaim any obligation to publicly update or revise any such statement to reflect any change in its expectations or in events, conditions, or circumstances on which any such statements may be based, or that may affect the likelihood that actual results will differ from those contained in the forward looking statements.

Business Overview

GSI Group Inc. and its subsidiaries (collectively referred to as the “Company”, “we”, “us”, “our”) design, develop, manufacture and sell precision photonic and motion control components and subsystems to Original Equipment Manufacturers (OEM’s) in the medical equipment and advanced industrial technology markets. Our highly engineered enabling technologies include laser sources, laser scanning and beam delivery products, optical data collection and machine vision technologies, medical visualization and informatics solutions, and precision motion control products. We specialize in collaborating with OEM customers to adapt our component and subsystem technologies to deliver highly differentiated performance in their applications.

Strategy

Our strategy is to drive sustainable, profitable growth through short-term and long-term initiatives, including:

· improving our business mix to increase medical sales as a percentage of total revenue by:

- introducing new products aimed at attractive medical applications, such as minimally invasive and robotic surgery, ophthalmology, patient monitoring, drug delivery, diagnostic testing and life science research;

- cross selling our entire product offerings to the leading medical equipment manufacturers; and

- pursuing complementary medical technology acquisitions;

· increasing our penetration of high growth advanced industrial technology applications, such as laser materials processing, robotics, automation, metrology, and micromachining, by working closely with OEM customers to launch application specific products that closely match the requirements of each application;

· broadening our portfolio of enabling technologies and capabilities through increased new product development investment, expanded sales and marketing channels to reach target customers and, investments in application development to further penetrate existing customers, while expanding the applicability of our solutions to new markets;

· broadening our product and service offerings through the acquisition of innovative and complementary technologies and solutions in medical and advanced industrial technology applications, including increasing our recurring revenue streams such as services, spare parts and consumables;

· improving our existing operations to expand profit margins and improve customer satisfaction by implementing lean manufacturing principles and strategic sourcing across our major production sites; and

· attracting, retaining, and developing world-class talented and motivated employees.

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Significant Events and Updates

Acquisition of Skyetek

On December 18, 2015, the Company acquired all assets and certain liabilities of Skyetek, Inc. (“Skyetek”), a Denver, Colorado-based provider of embedded and standalone RFID Solutions for medical OEM’s, for a total purchase price of $2.8 million, subject to customary working capital adjustments. This total purchase price includes $2.6 million in cash paid for the acquisition and $0.2 million in estimated fair value of future contingent consideration payable upon the achievement of certain sales order commitment targets from October 2015 through June 2017. The undiscounted range of contingent consideration is zero to $0.3 million. Skyetek specializes in high-performing HF and UHF RFID technologies that maximize efficiency and visibility for OEM’s serving the medical and advanced industrial markets. The acquisition creates an expanded range of highly competitive RFID solutions that significantly enhances our value proposition to OEM customers in various industries, but especially within the healthcare industry where there is an ever-growing need for improvements in workflow solutions, patient safety, anti-counterfeiting, and asset tracking throughout the hospital environment. The Skyetek business is included in the Company’s Vision Technologies reportable segment.

Acquisition of Lincoln Laser

On November 9, 2015, the Company acquired certain assets and liabilities of Lincoln Laser Company (“Lincoln Laser”), a Phoenix, Arizona-based provider of ultrafast precision polygon scanners and other optical scanning solutions for the medical, food processing, and advanced industrial markets, for a total purchase price of $12.6 million, subject to customary working capital adjustments. This total purchase price includes $10.3 million in cash paid for the acquisition and $2.3 million in estimated fair value of future contingent consideration payable upon the achievement of certain revenue targets for fiscal year 2016. The undiscounted range of contingent consideration is zero to $6.0 million. Lincoln Laser specializes in ultrafast scanning, leveraging their expertise in polygon motor design and electro-optic subsystems. The acquisition creates an expanded range of highly competitive beam delivery technologies for the Company. The Lincoln Laser business is included in the Company’s Laser Products reportable segment.

Acquisition of Applimotion

On February 19, 2015, the Company acquired 100% of the outstanding stock of Applimotion Inc. (“Applimotion”), a Loomis, California based provider of advanced precision motor and motion control technology to OEM customers in the medical and advanced industrial markets, for a total purchase price of $14.0 million, net of working capital adjustments. This total purchase price includes $13.0 million in cash paid for the acquisition and $1.0 million in estimated fair value of future contingent considerations payable upon the achievement of certain revenue targets for the fiscal years 2015 to 2017. The undiscounted range of contingent considerations is zero to $4.0 million. Applimotion specializes in motor applications that require highly precise and dynamic motion control. The acquisition enhances our strategic position in precision motion control by enabling us to offer a broader range of motion control technologies and integrated solutions. Applimotion is included in the Company’s Precision Motion reportable segment.  

JK Lasers Divestiture

On April 15, 2015, the Company completed the sale of our JK Lasers business for $29.6 million in cash, net of working capital adjustments and transaction costs, and recognized a $19.6 million pre-tax gain on the sale in the consolidated statement of operations. The JK Lasers business divestiture does not qualify for discontinued operations accounting treatment.

2016 Restructuring

During the third quarter of 2015, the Company initiated a program targeting annualized savings of $4.5 million to $5.5 million after the program is fully executed. The 2016 restructuring program includes consolidating our manufacturing operations to optimize our facility footprint and to better utilize resources, and reducing redundant costs due to productivity cost savings and business volume reductions. The Company expects to incur cash charges of $4.5 million to $5.5 million related to this program, which we anticipate completing during the second quarter of 2016. The Company incurred costs related to the 2016 restructuring program amounting to $3.1 million during the year ended December 31, 2015.

2015 Restructuring

During the first quarter of 2015, the Company implemented a program to eliminate redundant costs, as a result of acquisition and divestiture activities, to better align our operations to our strategic growth plans, to further integrate our business lines, and as a consequence of our productivity initiatives. The Company substantially completed the program in 2015, incurring costs amounting to $1.5 million during the year ended December 31, 2015. We principally intend to reallocate resources and reinvest savings from the 2015 restructuring into higher growth businesses and lower cost regions.

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Overview of Financial Results

Total revenue for 2015 was $373.6 million, an increase of $8.9 million, or 2.4%, versus the prior year primarily as the net result of our acquisitions and divestitures, which increased revenues by $10.0 million, or 2.8%. Foreign exchange rates adversely impacted our revenue by 4.0% during the year ended December 31, 2015. Excluding the impact of acquisitions, divestitures and changes in foreign exchange rates, total revenue for 2015 increased 3.6% versus the prior year. Our organic revenue growth is summarized as follows:

	% Change 2015 vs. 2014
Reported growth		2.4	%
Less: Change attributable to acquisitions and divestitures		2.8	%
Plus: Change due to foreign currency		4.0	%
Organic growth		3.6	%

The organic growth in our revenue for the year ended December 31, 2015 compared to the prior year was primarily attributable to growth in our Laser Products and Precision Motion segments offset by a decline in revenue in our Vision Technologies (formerly known as Medical Technologies) segment. The increase in revenue in our Laser Products segment was attributable to an increase in revenue from our laser beam delivery and CO2 lasers products. The growth in our Precision Motion segment was driven by an increase in revenue of optical encoders products, partially offset by a decline in revenue from our air bearing spindles products. These increases were partially offset by a decline in revenue in our Vision Technologies segment related to our visualization solutions product line.

Operating income from continuing operations increased $45.7 million from an operating loss of $16.8 million in 2014 to operating income of $28.9 million in 2015. This increase was primarily attributable to an impairment charge of $41.4 million related to the NDS business in 2014 and an increase in gross profit in 2015.

Diluted earnings per share (“EPS”) from continuing operations increased $1.51 from a loss per share of ($0.49) in 2014 to an earnings per share of $1.02 in 2015. The increase was primarily attributable to operating income from continuing operations in 2015 versus operating loss from continuing operations in the prior year and higher other income resulting from the gain recognized from the JK Lasers divestiture.

The specific components of our operating results for 2015, 2014 and 2013 are further discussed below.

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Results of Operations

The following table sets forth our results of operations as a percentage of revenue for the years indicated:

	2015			2014			2013
Revenue		100.0	%		100.0	%		100.0	%
Cost of revenue		57.7			58.8			58.3
Gross profit		42.3			41.2			41.7
Operating expenses:
Research and development and engineering		8.3			7.9			7.5
Selling, general and administrative		22.0			23.1			24.1
Amortization of purchased intangible assets		2.1			2.8			2.3
Restructuring, acquisition and divestiture related costs		2.2			0.6			1.7
Impairment of goodwill and intangible assets		—			11.4			—
Total operating expenses		34.6			45.8			35.6
Operating income (loss) from continuing operations		7.7			(4.6	)		6.1
Interest income (expense), net		(1.4	)		(1.4	)		(1.1	)
Foreign exchange transaction gains (losses), net		(0.0	)		0.4			(0.4	)
Other income (expense), net		0.7			0.7			0.5
Gain on disposal of business		5.3			—			—
Income (loss) from continuing operations before income taxes		12.3			(4.9	)		5.1
Income tax provision (benefit)		2.8			(0.3	)		2.0
Income (loss) from continuing operations		9.5			(4.6	)		3.1
Loss from discontinued operations, net of tax		—			(1.6	)		(0.6	)
Loss on disposal of discontinued operations, net of tax		—			(0.4	)		(0.2	)
Consolidated net income (loss)		9.5			(6.6	)		2.3
Less: Net income attributable to noncontrolling interest		—			—			—
Net income (loss) attributable to GSI Group Inc.		9.5	%		(6.6	)%		2.3	%

Revenue

The following table sets forth external revenue by reportable segment for 2015, 2014 and 2013 (dollars in thousands):

							% Change
	2015		2014		2013		2015 vs. 2014			2014 vs. 2013
Laser Products	$	168,331	$	177,726	$	166,598		(5.3	)%		6.7	%
Vision Technologies		124,725		122,187		90,276		2.1	%		35.3	%
Precision Motion		80,542		64,793		60,036		24.3	%		7.9	%
Total	$	373,598	$	364,706	$	316,910		2.4	%		15.1	%

Laser Products

Laser Products segment revenue in 2015 decreased by $9.4 million, or 5.3%, versus the prior year, as a result of the JK Lasers divestiture, which reduced segment revenues by $16.7 million, partially offset by an increase in revenue of our laser beam delivery and CO2 laser products due to an increase in demand in the advanced industrial market and certain medical applications and the Lincoln Laser acquisition.

Laser Products segment revenue in 2014 increased by $11.1 million, or 6.7%, versus the prior year, due to growth across all product lines.  The revenue growth was primarily due to an increase in revenue of our CO2 lasers and fiber lasers products, driven by new product launches, new customer wins, and market growth. In addition, revenue of our laser beam delivery products grew due to increased demand in material processing in advanced industrial markets and certain medical applications.

Vision Technologies

Vision Technologies segment revenue in 2015 increased by $2.5 million, or 2.1%, versus the prior year. The increase was primarily due to revenue from our optical data collection business being included in reported revenue in the prior year only following the JADAK acquisition in March 2014 and increases in revenue from our thermal printers and light and color measurement products,

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partially offset by a decline in our visualization solutions revenue as a result of our radiology products and customer qualification cycles.

Vision Technologies segment revenue in 2014 increased by $31.9 million, or 35.3%, versus the prior year. A $45.4 million increase in revenue attributable to the JADAK acquisition was partially offset by a decline in revenue in our visualization solutions products as a result of dual sourcing at an OEM customer that began in 2013, softness in medical equipment spending impacting our customer’s demand for our products, and delays in new product introductions.

Precision Motion

Precision Motion segment revenue in 2015 increased by $15.7 million, or 24.3%, versus the prior year. This increase was principally driven by the Applimotion acquisition and increased revenue of our optical encoders products as a result of increased customer volumes in both the medical and advanced industrial markets, partially offset by a decline in revenue of our air bearing spindles products due to lower demand from the printed circuit board industry.

Precision Motion segment revenue in 2014 increased by $4.8 million, or 7.9%, versus the prior year. This increase was principally driven by increased revenue of our optical encoders products as a result of a market share gain with a major OEM customer and new customer wins.

Gross Profit

The following table sets forth the gross profit and gross profit margin for each of our reportable segments for 2015, 2014 and 2013 (dollars in thousands):

	2015			2014			2013
Gross profit:
Laser Products	$	73,602		$	74,224		$	68,819
Vision Technologies		48,966			48,678			35,824
Precision Motion		36,709			28,333			27,778
Unallocated Corporate and Shared Services		(1,387	)		(1,068	)		(194	)
Total	$	157,890		$	150,167		$	132,227
Gross profit margin:
Laser Products		43.7	%		41.8	%		41.3	%
Vision Technologies		39.3	%		39.8	%		39.7	%
Precision Motion		45.6	%		43.7	%		46.3	%
Total		42.3	%		41.2	%		41.7	%

Gross profit and gross profit margin can be influenced by a number of factors, including product mix, pricing, volume, manufacturing efficiencies and utilization, costs for raw materials and outsourced manufacturing, headcount, inventory obsolescence and warranty expenses.

Laser Products

Laser Products segment gross profit in 2015 decreased $0.6 million, or 0.8%, versus the prior year primarily due to a decline in revenue as a result of the JK Lasers divestiture, which decreased gross profit by $4.9 million, partially offset by revenue growth in our laser beam delivery and CO2 laser products and an increase in gross profit margin. Laser Products segment gross profit margin was 43.7% for 2015, compared with a gross profit margin of 41.8% for the prior year. The increase in gross profit margin was primarily attributable to the JK Lasers divestiture, which accounted for 1.3 percentage point of the 1.9 percentage point increase. The remaining increase in gross profit margin was driven by increases in volume in our laser beam delivery and CO2 laser products, product mix, and continuous improvement productivity initiatives.

Laser Products segment gross profit in 2014 increased $5.4 million, or 7.9%, versus the prior year primarily due to an increase in revenue and an increase in gross profit margin. Laser Products segment gross profit margin was 41.8% for 2014, compared with a gross profit margin of 41.3% for the prior year. The 0.5 percentage point increase in gross profit margin was primarily attributable to productivity improvements as a result of our manufacturing process improvement initiatives and margin improvements in our fiber lasers products.

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Vision Technologies

Vision Technologies segment gross profit for 2015 increased $0.3 million, or 0.6%, versus the prior year. The increase was primarily attributable to a decline in intangible asset amortization expense, partially offset by product mix. Vision Technologies segment gross profit margin was 39.3% for 2015, compared with a gross profit margin of 39.8% for the prior year. The 0.5 percentage point decrease in gross profit margin was primarily attributable to product mix, offset by lower intangible asset amortization expense. Included in gross profit for 2015 was amortization of developed technologies of $2.2 million. Included in gross profit for 2014 was amortization of developed technologies and amortization of inventory fair value step-ups of $3.7 million.

Vision Technologies segment gross profit for 2014 increased $12.9 million, or 35.9%, versus the prior year. The increase was primarily attributable to the JADAK acquisition in March 2014, which accounted for an $18.9 million increase in gross profit year over year, partially offset by a decline in gross profit for our visualization solutions products due to lower revenue. Vision Technologies segment gross profit margin remained relatively flat year over year. Included in gross profit was amortization of developed technologies and amortization of inventory fair value step-ups of $3.7 million and $3.1 million for 2014 and 2013, respectively.

Precision Motion

Precision Motion segment gross profit for 2015 increased $8.4 million, or 29.6%, versus the prior year primarily due to an increase in revenue and gross profit margin. Precision Motion segment gross profit margin was 45.6% for 2015, compared with a gross profit margin of 43.7% for the prior year. The 1.9 percentage point increase in gross profit margin was primarily attributable to an increase in volumes, product mix and continuous improvement productivity initiatives.

Precision Motion segment gross profit for 2014 increased $0.6 million, or 2.0%, versus the prior year primarily due to an increase in revenue volume of our optical encoders products. Precision Motion segment gross profit margin was 43.7% for 2014, compared with a gross profit margin of 46.3% for the prior year. The 2.6 percentage point decrease in gross profit margin was a consequence of manufacturing ramp-up costs.

Operating Expenses

The following table sets forth operating expenses for 2015, 2014 and 2013 (dollars in thousands):

							% Change
	2015		2014		2013		2015 vs. 2014			2014 vs. 2013
Research and development and engineering	$	31,043	$	28,954	$	23,787		7.2	%		21.7	%
Selling, general and administrative		82,049		84,380		76,337		(2.8	)%		10.5	%
Amortization of purchased intangible assets		7,611		10,262		7,270		(25.8	)%		41.2	%
Restructuring, acquisition and divestiture related costs		8,254		1,935		5,387		326.6	%		(64.1	)%
Impairment of goodwill and intangible assets		—		41,442		—	N/A			N/A
Total	$	128,957	$	166,973	$	112,781		(22.8	)%		48.1	%

Research and Development and Engineering Expenses

Research and development and engineering (“R&D”) expenses are primarily comprised of employee compensation and related expenses and cost of materials for R&D projects.

R&D expenses were $31.0 million, or 8.3% of revenue, in 2015, versus $29.0 million, or 7.9% of revenue, in 2014. R&D expenses increased in terms of total dollars and as a percentage of revenue, primarily due to acquisitions, partially offset by the JK Lasers divestiture.

R&D expenses were $29.0 million, or 7.9% of revenue, in 2014, versus $23.8 million, or 7.5% of revenue, in 2013. R&D expenses increased in terms of total dollars primarily due to the acquisition of JADAK.

Selling, General and Administrative Expenses

Selling, general and administrative (“SG&A”) expenses include costs for sales and marketing, sales administration, finance, human resources, legal, information systems and executive management.

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SG&A expenses were $82.0 million, or 22.0% of revenue, in 2015, versus $84.4 million, or 23.1% of revenue, in 2014. SG&A expenses decreased in terms of total dollars and as a percentage of revenue primarily due to the JK Lasers divestiture and lower compensation expense, partially offset by increases from current year acquisitions and the JADAK acquisition in March 2014.

SG&A expenses were $84.4 million, or 23.1% of revenue, in 2014, versus $76.3 million, or 24.1% of revenue, in 2013. SG&A expenses increased in terms of total dollars primarily due to the acquisition of JADAK.

Amortization of Purchased Intangible Assets

Amortization of purchased intangible assets is charged to our Laser Products, Vision Technologies and Precision Motion segments. Amortization of core technologies is included in cost of revenue in the consolidated statement of operations. Amortization of customer relationships, trademarks, backlog and other intangibles are included in operating expenses in the consolidated statement of operations.

Amortization of purchased intangible assets, excluding the amortization for developed technologies that is included in cost of revenue, was $7.6 million, or 2.0% of revenue, in 2015, versus $10.3 million, or 2.8% of revenue, in 2014. The decrease, in terms of total dollars and as a percentage of revenue, was related to a decrease in amortization of acquired intangible assets from prior year acquisitions.

Amortization of purchased intangible assets, excluding the amortization of developed technologies that is included in cost of revenue, was $10.3 million, or 2.8% of revenue, in 2014, versus $7.3 million, or 2.3% of revenue,in 2013. The increase, in terms of total dollars and as a percentage of revenue, was related to the amortization of acquired intangible assets from the JADAK acquisition.

Restructuring, Acquisition and Divestiture Related Costs

Restructuring, acquisition and divestiture related charges primarily relate to our restructuring programs, acquisition related costs incurred for the acquisition of Skyetek in December 2015, Lincoln Laser in November 2015, Applimotion in February 2015, JADAK in March 2014 and NDS in January 2013. Acquisition related costs also include costs related to future potential acquisitions, failed acquisitions and changes in fair value of contingent considerations. Divestiture costs primarily related to the JK Lasers divestiture in April 2015.

The Company recorded restructuring, acquisition and divestiture related costs of $8.3 million in 2015, versus $1.9 million in 2014. The Company recognized acquisition related costs of $1.3 million in 2015. Acquisition related costs included expenses of $1.9 million related to acquisitions in 2015, partially offset by a $0.6 million reversal of accruals for earn-out agreements in connection with the 2014 JADAK acquisition. The Company recorded restructuring costs of $5.8 million primarily related to our restructuring programs and $1.1 million in divestiture costs related to the JK Lasers divestiture. The increase in restructuring, acquisition and divestiture related costs is primarily due to the increase in costs related to restructuring programs in 2015. Acquisition related costs were $1.5 million during 2014.

The Company recorded restructuring, acquisition and divestiture related costs of $1.9 million in 2014, versus $5.4 million in 2013. The Company recognized acquisition related costs of $1.5 million in 2014, which included expenses of $0.6 million recognized under earn-out agreements in connection with the JADAK acquisition. The decrease in restructuring, acquisition and divestiture related costs is primarily due to the decrease in costs related to restructuring programs in 2014 as compared to 2013. Acquisition related costs were $1.6 million during 2013.

Impairment of Goodwill and Intangible Assets

The Company recorded a non-cash impairment charge of $41.4 million in the consolidated financial statements in 2014 as a result of lower expectations for revenue and operating profit from our NDS business.

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Operating Income (Loss) by Segment

The following table sets forth operating income by segment for 2015, 2014 and 2013 (in thousands):

	2015			2014			2013
Operating Income (Loss) from Continuing Operations
Laser Products	$	35,971		$	33,053		$	25,143
Vision Technologies		(2,057	)		(43,079	)		3,566
Precision Motion		16,877			13,023			12,062
Unallocated Corporate and Shared Services		(21,858	)		(19,803	)		(21,325	)
Total	$	28,933		$	(16,806	)	$	19,446

Laser Products

Laser Products operating income from continuing operations for 2015 increased by $2.9 million, or 8.8%, from 2014 primarily due to the improved profitability of the Laser Products segment after the JK Lasers divestiture, partially offset by an increase in restructuring and divestiture related costs of $1.7 million. Amortization of intangible assets for the Laser Products segment was $4.4 million in 2015 compared to $4.1 million in 2014.

Laser Products operating income from continuing operations for 2014 increased by $7.9 million, or 31.5%, from 2013 primarily due to an increase in gross profit of $5.4 million and a $2.0 million decrease in restructuring and acquisition related charges compared to 2013. Amortization of intangible assets for the Laser Products segment was $4.1 million in both 2014 and 2013.  

Vision Technologies

Vision Technologies operating loss from continuing operations decreased by $41.0 million from an operating loss of $43.1 million in 2014 to an operating loss of $2.1 million in 2015 primarily due to the NDS goodwill and intangible assets impairment charge recorded in 2014 and a decrease in amortization of purchased intangibles of $4.8 million, partially offset by an increase in R&D expenses as a result of the 2014 JADAK acquisition and an increase in restructuring charges related to our 2016 restructuring program.

Vision Technologies operating income from continuing operations decreased by $46.6 million from operating income of $3.6 million in 2013 to an operating loss of $43.1 million in 2014 primarily due to the NDS goodwill and intangible assets impairment charge of $41.4 million, an increase in amortization of intangibles and amortization of our inventory fair value step-ups of $3.7 million and a decline in visualization solutions revenue, partially offset by an increase in operating income from continuing operations as a result of the JADAK acquisition.

Precision Motion

Precision Motion operating income from continuing operations for 2015 increased by $3.9 million, or 29.6%, from 2014 primarily due to an increase in gross profit of $8.4 million, partially offset by higher operating expenses due to the Applimotion acquisition and an increase in restructuring charges related to our 2016 restructuring program.

Precision Motion operating income from continuing operations for 2014 increased by $1.0 million, or 8.0%, from 2013 primarily due to an increase in gross profit of $0.6 million and a $0.4 million decrease in restructuring costs.

Unallocated Corporate and Shared Services

Unallocated corporate and shared services costs primarily represent costs of corporate and shared service functions and other public company costs that are not allocated to the operating segments, including certain restructuring and most acquisition related costs.

Unallocated corporate and shared services costs for 2015 increased by $2.1 million, or 10.4%, from 2014 primarily due to an increase in professional services costs and an increase in restructuring and acquisition related costs of $1.1 million. Restructuring and acquisition related costs were $2.6 million in 2015, compared to $1.5 million in 2014.

Unallocated corporate and shared services costs for 2014 decreased by $1.5 million, or 7.1%, from 2013 primarily due to lower restructuring and acquisition costs. Restructuring and acquisition related costs were $1.5 million in 2014, compared to $2.2 million in 2013.

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Interest Income (Expense), Foreign Exchange Transaction Gains (Losses), and Other Income (Expense), Net

The following table sets forth interest income (expense), net, foreign exchange transaction gains (losses), net and other income (expense), net for 2015, 2014 and 2013 (in thousands):

	2015			2014			2013
Interest income (expense), net	$	(5,180	)	$	(5,096	)	$	(3,468	)
Foreign exchange transaction gains (losses), net		(21	)		1,281			(1,301	)
Other income (expense), net		2,661			2,706			1,500
Gain on disposal of business		19,629			—			—

Interest Income (Expense), Net

Net interest expense was $5.2 million in 2015 versus $5.1 million in the prior year. The weighted average interest rate on our Senior Credit Facilities was 3.24% and 3.25% during 2015 and 2014, respectively. Included in net interest expense was non-cash interest expense of approximately $0.9 million and $1.0 million in 2015 and 2014, respectively, related to amortization of deferred financing costs on our debt.

The increase in net interest expense in 2014 versus the prior year was the result of higher average debt levels and higher average interest rates during 2014. The higher debt levels in 2014 were the result of borrowings to fund the JADAK acquisition in March 2014. The weighted average interest rate on our Senior Credit Facilities was 3.25% and 2.83% during 2014 and 2013, respectively. Included in net interest expense was non-cash interest expense of approximately $1.0 million and $0.9 million in 2014 and 2013, respectively, related to amortization of deferred financing costs on our debt.

Foreign Exchange Transaction Gains (Losses), Net

Foreign exchange transaction gains (losses), net, were less than $0.1 million net losses in 2015 versus $1.3 million net gains for the prior year due to changes in the U.S. Dollar exchange rates against the Euro, British Pound and Japanese Yen and a $1.3 million foreign currency loss related to the cash proceeds in U.S. dollars from the JK Lasers divestiture being held for a period of time by our UK subsidiary.

Foreign exchange transaction gains (losses), net, were $1.3 million net gains in 2014 versus $1.3 million net losses for the prior year due to the performance of the U.S. Dollar against the Euro, British Pound and Japanese Yen.

Other Income (Expense), Net

We recognized $2.6 million, $2.7 million and $1.5 million of other income in 2015, 2014 and 2013, respectively, primarily related to earnings from our equity-method investment in Laser Quantum. Other income increased from 2013 to 2014 due to higher earnings from our equity-method investment in Laser Quantum and an increase in our ownership percentage from 25.1% to 41.2% during the second quarter of 2013.

The summarized financial information for Laser Quantum is as follows (in thousands):

	2015		2014		2013
Revenue	$	25,599	$	23,013	$	16,269
Income from operations	$	7,362	$	7,434	$	4,720
Net income	$	6,925	$	6,627	$	3,745

Gain on Disposal of Business

The gain on disposal of business in 2015 was due to a $19.6 million gain recognized as a result of the JK Lasers divestiture in April 2015.

Income Taxes

We recorded a tax provision of $10.4 million in 2015, as compared to a tax benefit of $1.0 million in 2014. The effective tax rate for 2015 was 22.6% of income before taxes, compared to an effective tax rate of 5.6% of loss before taxes for 2014. Our effective tax

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rate in 2015 differs from the Canadian statutory rate of 27.0% primarily due to a $1.4 million benefit from the JK Lasers divestiture, a $0.7 million benefit associated with R&D tax credits generated during the year, a $0.7 million IRS audit settlement related impact and a decrease of $0.6 million valuation allowance recorded in the U.S.

We recorded a tax benefit of $1.0 million in 2014, as compared to a tax expense of $6.2 million in 2013. The effective tax rate for 2014 was 5.6% of loss before taxes, compared to an effective tax rate of 38.3% of income before taxes for 2013. Our effective tax rate in 2014 differs from the Canadian statutory rate of 27.0% primarily due to $4.6 million additional valuation allowance on net operating losses in Canada and certain other jurisdictions, which was partially offset by $1.1 million of international tax rate differences and a $1.7 million benefit associated with R&D tax credits generated during the year.

As a significant portion of the NDS goodwill and intangible assets impairment charge was recognized in Canada, we had a $20.2 million loss before taxes in Canada in 2014 where we do not recognize any tax benefit as a result of the full valuation allowance on deferred tax assets. This significantly reduced the income tax benefit as a percentage of the loss before taxes as reported in the consolidated statement of operations for 2014.

Discontinued Operations

Loss from discontinued operations, net of tax, was less than $0.1 million and $7.3 million in 2015 and 2014, respectively. The decrease in the loss from discontinued operations, net of tax, was primarily due to losses related to the Scientific Lasers business, which was sold in July 2014.

Loss from discontinued operations, net of tax, was $7.3 million and $2.7 million in 2014 and 2013, respectively. The increase in the loss from discontinued operations, net of tax, was primarily due to the sale of the Scientific Lasers business, which resulted in a $3.0 million fair value write-down of the Scientific Lasers business and an impairment charge of $0.5 million in connection with our joint venture investment in Excel Laser Technology Private Limited, which is part of our Scientific Lasers business.

In July 2014, we completed the sale of the Scientific Lasers business for $6.5 million in cash, net of working capital adjustments. We recorded a $1.7 million loss on the sale, net of tax, in the consolidated statement of operations.

Liquidity and Capital Resources

We assess our liquidity in terms of our ability to generate cash to fund our operating, investing, and financing activities. Our primary ongoing cash requirements are funding operations, capital expenditures, investments in businesses, and repayment of our debt and related interest expense. Our primary sources of liquidity are cash flows from operations and borrowings under our revolving credit facility. We believe our future operating cash flows will be sufficient to meet our future operating and capital expenditure cash needs for the foreseeable future, including at least the next 12 months. The availability of borrowings under our revolving credit facility provides an additional potential source of liquidity should it be required for business acquisitions. In addition, we may seek to raise additional capital, which could be in the form of bonds, convertible debt or equity, to fund business development activities or other future investing cash requirements, subject to approval by the lenders in the Amended and Restated Credit Agreement.

Significant factors affecting the management of our ongoing cash requirements are the adequacy of available bank lines of credit and our ability to attract long-term capital with satisfactory terms. The sources of our liquidity are subject to all of the risks of our business and could be adversely affected by, among other factors, a decrease in demand for our products, our ability to integrate current and future acquisitions, deterioration in certain financial ratios, and market changes in general. See “Risks Relating to Our Common Shares and Our Capital Structure” included in Item 1A of this Annual Report on Form 10-K.

Our ability to make payments on our indebtedness and to fund our operations may be dependent upon the earnings and the distribution of funds from our subsidiaries. Local laws and regulations and/or the terms of our indebtedness restrict certain of our subsidiaries from paying dividends and transferring assets to us. We cannot assure you that applicable laws and regulations and/or the terms of our indebtedness will permit our subsidiaries to provide us with sufficient dividends, distributions or loans when necessary.

In October 2013, the Company’s Board of Directors authorized a share repurchase plan under which the Company may repurchase outstanding shares of the Company’s common stock up to an aggregate amount of $10.0 million. The shares may be repurchased from time to time, at the Company’s discretion, based on ongoing assessment of the capital needs of the business, the market price of the Company’s common stock, and general market conditions. Shares may also be repurchased through an accelerated stock purchase agreement, on the open market or in privately negotiated transactions in accordance with applicable federal securities laws. Repurchases may be made under certain SEC regulations, which would permit common stock to be purchased when the Company would otherwise be prohibited from doing so under insider trading laws. The share repurchase plan does not obligate the Company to acquire any particular amount of common stock. No time limit was set for the completion of the share repurchase program, and the program may be suspended or discontinued at any time. The Company expects to fund the share repurchase through cash on hand and future cash flow from operations. During 2015, the Company repurchased 122 thousand shares in the open market for an aggregate

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purchase price of $1.6 million at an average price of $13.29 per share. As of December 31, 2015, the Company had repurchased an aggregate of 172 thousand shares for an aggregate purchase price of $2.2 million at an average price of $12.48 per share.

As of December 31, 2015, $35.2 million of our $60.0 million cash and cash equivalents was held by our subsidiaries outside of the United States and Canada. Generally, our intent is to use cash held in these foreign subsidiaries to fund our local operations or acquisitions by those local subsidiaries. However, in certain instances, we have identified excess cash for which we may repatriate and have established liabilities for the expected tax cost. Additionally, we may use intercompany loans to address short-term cash flow needs for various subsidiaries.

Amended and Restated Credit Agreement

In December 2012, we entered into an amended and restated senior secured credit agreement (the “Amended and Restated Credit Agreement”), consisting of a $50.0 million, 5-year term loan facility and a $75.0 million, 5-year revolving credit facility (collectively, the “Senior Credit Facilities”). The Senior Credit Facilities mature in December 2017. In February 2014, we entered into a fourth amendment to the Amended and Restated Credit Agreement (the “Fourth Amendment”). The Fourth Amendment increased the revolving credit facility commitment under the Amended and Restated Credit Agreement by $100 million from $75 million to $175 million and resets the accordion feature to $100 million for future expansion. Additionally, the Fourth Amendment increased the maximum permitted consolidated leverage ratio financial covenant from 2.75 to 3.00.

As of December 31, 2015, we had term loans of $27.5 million and revolving loans of $70.0 million outstanding under the Amended and Restated Credit Agreement.

The Amended and Restated Credit Agreement contains various covenants that we believe are usual and customary for this type of agreement, including a maximum allowed leverage ratio, and a minimum required fixed charge coverage ratio (as defined in the Amended and Restated Credit Agreement). The following table summarizes these financial covenant requirements as stated in the Fourth Amendment and our compliance therewith as of December 31, 2015.

	Requirement		Actual December 31, 2015
Maximum consolidated leverage ratio		3.00		1.60
Minimum consolidated fixed charge coverage ratio		1.50		3.78

In addition, the Amended and Restated Credit Agreement contains various other customary representations, warranties and covenants applicable to the Company and its subsidiaries, including: (i) limitations on certain payments; (ii) limitations on fundamental changes involving the Company; (iii) limitations on the disposition of assets; and (iv) limitations on indebtedness, investments, and liens.

Cash Flows

Cash and cash equivalents totaled $60.0 million at December 31, 2015, versus $51.1 million at December 31, 2014. The net increase in cash and cash equivalents is primarily related to cash inflows from operating activities of $33.4 million, net cash proceeds of $29.6 million from the sale of our JK Lasers business, and borrowings of $13.0 million under our Senior Credit Facilities. These inflows were offset by cash outflows of $26.0 million for the acquisition of Applimotion, Lincoln Laser and Skyetek, repayments of our debt of $30.5 million, and capital expenditures of $5.6 million.

The following table summarizes our cash and cash equivalent balances, cash flows and unused and available funds on our revolving credit facility for the years indicated (in thousands):

	2015			2014			2013
Cash and cash equivalents	$	59,959		$	51,146		$	60,980
Net cash provided by operating activities of continuing operations	$	33,429		$	43,990		$	56,178
Net cash used in investing activities of continuing operations	$	(1,842	)	$	(93,541	)	$	(85,297	)
Net cash provided by (used in) financing activities of continuing operations	$	(21,535	)	$	40,281		$	18,574
Unused and available funds under revolving credit facility	$	105,000		$	95,000		$	46,000

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Operating Cash Flows

Cash provided by operating activities of continuing operations was $33.4 million in 2015 versus $44.0 million in 2014. Income from continuing operations increased in 2015 while changes in operating assets and liabilities decreased cash provided by operating activities of continuing operations by $6.4 million. Cash provided by operating activities of continuing operations was negatively impacted by an increase in our days sales outstanding from 53 days at December 31, 2014 to 57 days at December 31, 2015, a decrease in our days payables outstanding from 45 days at December 31, 2014 to 41 days at December 31, 2015 and an increase in inventories (excluding inventories sold as part of JK Lasers divestiture and inventories from the Applimotion, Lincoln Laser and Skyetek acquisitions). The Company’s days sales outstanding was impacted by the timing of sales occurring later in the fourth quarter in 2015 compared to 2014.

Cash provided by operating activities of continuing operations was $44.0 million in 2014 versus $56.2 million in 2013. Cash provided operating activities of continuing operations decreased $12.2 million primarily due to net tax refunds of $11.8 million received in 2013 as a result of the settlement with the IRS. Cash provided by operating activities of continuing operations was positively impacted by a decrease in our days sales outstanding from 56 at December 31, 2013 to 53 at December 31, 2014 and a decrease in inventories excluding inventories from the JADAK acquisition. Cash provided by operating activities of continuing operations was negatively impacted by a decrease in our days payables outstanding from 48 at December 31, 2013 to 45 at December 31, 2014.

Cash used in operating activities of discontinued operations was less than $0.1 million in 2015 as a result of the sale of our Scientific Lasers business in July 2014. Cash used in operating activities of discontinued operations was $1.7 million and $7.0 million in 2014 and 2013, respectively. The $5.3 million decrease in cash used in operating activities of discontinued operations in 2014 from 2013 was primarily related to the divestiture of the Scientific Lasers business in 2014 and divestiture of the Semiconductor Systems business in 2013.

Investing Cash Flows

Cash used in investing activities of continuing operations was $1.8 million during 2015 primarily due to cash consideration of $26.0 million paid for the Applimotion, Lincoln Laser and Skyetek acquisitions and $5.6 million in capital expenditures, partially offset by $29.6 million in cash proceeds received from the sale of the JK Lasers business.

Cash used in investing activities of continuing operations was $93.5 million during 2014 primarily due to cash consideration of $93.7 million paid for the JADAK acquisition in March 2014 and $5.4 million in capital expenditures, partially offset by proceeds of $5.4 million from an escrow claim related to the NDS acquisition. This compares to cash used in investing activities of continuing operations of $85.3 million in 2013 primarily related to cash consideration of $80.8 million paid for the NDS acquisition and $4.8 million in capital expenditures.

Cash provided by investing activities of discontinued operations was $0.2 million during 2015 primarily related to net cash proceeds from the sale of Excel Laser Technology Private Limited (the “India JV”). Cash provided by investing activities of discontinued operations was $3.8 million during 2014, primarily related to $4.7 million of net proceeds from the sale of the Scientific Lasers business, offset by capital expenditures of $0.9 million. This compares to cash provided by investing activities of discontinued operations in 2013 of $12.3 million, primarily related to $8.2 million in net proceeds from the sale of the Semiconductor Systems business and $4.6 million in net proceeds from the sale of our East Setauket, New York facility which was part of our Scientific Lasers business.

We have no material commitments to purchase property, plant and equipment and expect such expenditures to be approximately $6 million to $7 million in 2016.

Financing Cash Flows

Cash used in financing activities of continuing operations was $21.5 million during 2015, primarily due to $7.5 million of our contractual term loan payments, $23.0 million of optional repayments of borrowings under our revolving credit facility and the repurchase of $1.6 million of the Company’s common stock, offset by $13.0 million of borrowings under our revolving credit facility to fund the Applimotion acquisition. Cash provided by financing activities of continuing operations was $40.3 million during 2014, primarily due to $77.0 million of borrowings under our revolving credit facility used to pay a portion of the cash consideration paid for the JADAK acquisition, partially offset by $7.5 million of our contractual term loan payments and $26.0 million of optional repayments of borrowings under our revolving credit facility. Cash provided by financing activities of continuing operations was $18.6 million during 2013, primarily due to $60.0 million of borrowings under our revolving credit facility used to pay for the NDS

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acquisition, partially offset by $7.5 million of our contractual term loan payments and $31.0 million of optional repayments of borrowings under our revolving credit facility.

We expect to use $8.5 million of cash in 2016 for financing activities, comprised of quarterly contractual payments of $1.9 million on our term loan facility, and $1.0 million in principal payments for our capital lease obligations. In addition, from time to time we may make payments to pay down our revolving credit facility with future cash flows generated from operating activities.

Other Liquidity Matters

Pension Plans

We maintain a defined benefit pension plan in the U.K. (the “U.K. Plan”). Our U.K. Plan was closed to new members in 1997 and stopped accruing additional pension benefits for existing members in 2003, thereby limiting our obligation to benefits earned through that date. Benefits under this plan were based on the employees’ years of service and compensation as of the date the plan was frozen. On July 1, 2013, the Company provided a Guarantee (the “Guarantee”) in favor of the trustees of the U.K. Plan with respect to all present and future obligations and liabilities under the U.K. Plan (whether actual or contingent and whether owed jointly or severally and in any capacity whatsoever) of GSI Group Limited, a wholly owned subsidiary of GSI Group Inc.

Our funding policy is to fund pensions based on actuarial methods as permitted by regulatory authorities. The results of funding valuations depend on both the funding deficit and the assumptions that we make with regard to attributes such as asset returns, discount rates, mortality, retail price inflation and other market driven changes. The assumptions used represent one estimate of a possible future outcome. The final cost to us will be determined by events as they actually become known. Due to the underfunded positions that our U.K. Plan currently has and potential changes in the actual outcomes relative to our assumptions, we may have to increase payments to fund this plan in the future. As of December 31, 2015, the projected benefit obligation under the U.K. Plan exceeded the fair value of plan assets by $3.5 million.

Based on the results of the most recent valuation completed in the fourth quarter 2015, the Company’s annual contributions will be approximately $1.0 million per year in 2016 and will increase by 2.9% per year thereafter.  

As a result of the covenant that exists between our U.K. subsidiary and the Plan Trustees regarding the funding of the U.K. Plan, our ability to transfer assets outside our U.K. subsidiary, and its wholly owned subsidiary in China, may be limited.

Our defined benefit pension plan in Japan was terminated in the first quarter of 2015. The accrued retirement allowance amount calculated in accordance with Japanese retirement benefit rules on a voluntary retirement basis as of March 1, 2015 is being transferred to each employee’s new defined contribution plan account over 4 years.

Off-Balance Sheet Arrangements, Contractual Obligations

Contractual Obligations

The following table summarizes our contractual obligations at December 31, 2015 and the effect such obligations are expected to have on liquidity and cash flows in future years. We have excluded the future cash payments for unrecognized tax benefits of $6.1 million, including interest and penalties, because we are uncertain if and when such amounts may be settled. These unrecognized tax benefits have been classified as long-term liabilities on the consolidated balance sheets and have been further explained in Note 13 to our Consolidated Financial Statements included in Item 8 of this Annual Report on Form 10-K.

Contractual Obligations	Total		2016		2017-2018		2019-2020		Thereafter
	(In thousands)
Senior Credit Facilities (1)	$	97,500	$	7,500	$	90,000	$	—	$	—
Interest on Senior Credit Facilities (2)		4,963		2,687		2,276		—		—
Capital leases		13,845		1,498		2,366		1,842		8,139
Operating leases (3)		18,482		4,973		6,259		1,889		5,361
Purchase commitments (4)		35,916		34,122		1,794		—		—
U.K. pension plan (5)		6,294		975		2,037		2,157		1,125
Total contractual cash obligations	$	177,000	$	51,755	$	104,732	$	5,888	$	14,625

(1) As of December 31, 2015, a total of $27.5 million of term loan debt and $70.0 million of revolving credit facility borrowings were outstanding under the Senior Credit Facilities. The term loan is payable in 8 quarterly installments of $1.9 million with the remaining amount due upon maturity in December 2017. The revolving credit facility is due at maturity in December 2017.

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(2) For the purpose of this calculation, current interest rates on floating rate obligation (LIBOR plus applicable margin, as defined in the Amended and Restated Credit Agreement) were used for the remainder contractual life of the term loan.  

(3) These amounts primarily represent the gross amounts due for facilities that are leased. The amounts include payments due with respect to both active operating facilities and idle facilities that have been vacated as a result of our restructuring actions.

(4) Purchase commitments represent unconditional purchase obligations as of December 31, 2015.

(5) Assumes funding obligations equivalent to $1.0 million per year, increasing 2.9% through 2021 based on annual funding contributions in effect as of December 31, 2015. Future funding requirements will be affected by various actuarial assumptions and actual experience of the pension plan.

Off-Balance Sheet Arrangements

Through December 31, 2015, we have not entered into any off-balance sheet arrangements or material transactions with unconsolidated entities or other persons.

Critical Accounting Policies and Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenues and expenses during the reporting periods. On an ongoing basis, we evaluate our estimates, assumptions and judgments, including those related to revenue recognition, inventory valuation, assessment of the valuation of goodwill, intangible assets and tangible long-lived assets, employee benefit plans, restructuring charges, accounting for income taxes, and accounting for loss contingencies. Actual results could differ significantly from our estimates in the future.

We believe that the following critical accounting policies and estimates most significantly affect the portrayal of our financial condition and results of operations and require the most difficult and subjective judgments.

Revenue Recognition. Revenue from the sale of products is recognized when we meet all four of the criteria for revenue recognition within the fiscal period. These criteria are: evidence of an arrangement exists; delivery has occurred; the price is fixed or determinable; and collection of the resulting receivable is reasonably assured. Revenue recognition requires judgment and estimates, which may affect the amount and timing of revenue recognized in any given period.

The Laser Products, Vision Technologies, and Precision Motion segments have revenue transactions that are comprised of both single-element and multiple-element transactions. Multiple-element transactions typically include two or more products and occasionally contain non-standard/extended warranties, or preventative maintenance plans. For multiple-element transactions, revenue is generally recognized upon shipment, using the relative selling price method in accordance with Accounting Standards Codification (“ASC”) 605-25 “Revenue – Multiple-Element Arrangements”. Single-element transactions are typically recognized upon shipment at their contractually stated prices.

The Company generally provides warranties for its products. The standard warranty period is typically 12 months to 24 months for the Laser Products and Precision Motion segments and 12 months to 36 months for the Vision Technologies segment. The standard warranty period for product sales is accounted for under the provisions of ASC 450 “Contingencies”, as the Company has the ability to ascertain the likelihood of the liability and can reasonably estimate the amount of the liability. A provision for the estimated cost related to warranty is recorded to cost of revenue at the time revenue is recognized. The Company’s estimate of costs to service the warranty obligations is based on historical experience and expectations of future conditions. To the extent the Company experiences warranty claims or costs associated with servicing those claims that differ from the original estimates, revisions to the estimated warranty liability are recorded at that time, with an offsetting entry recorded to cost of revenue.

The Company occasionally sells separately priced non-standard/extended warranty services or preventative maintenance plans, which are accounted for in accordance with provisions of ASC 605-20-25-3, “Separately Priced Extended Warranty and Product Maintenance Contracts”. Under this guidance, we recognize the separately priced extended/non-standard warranty and preventative maintenance fees ratably over the associated period.

The Company, at the request of its customers, may perform professional services, generally for the maintenance and repair of products previously sold to those customers. These services are usually in the form of time and materials based contracts which are short in duration. Revenue for time and materials services is recorded at the completion of services requested under a customer’s purchase order.

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In May 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers”, which provides guidance for revenue recognition. ASU 2014-09 requires entities to recognize revenue in a way that depicts the transfer of goods or services to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB issued ASU 2015-14, “Revenue from Contracts with Customers,” which delayed effective date of ASU 2014-09 to the first annual and interim reporting periods beginning after December 15, 2017. Early adoption is permitted, however, no earlier than the original effective date of the first reporting period after December 15, 2016 under ASU 2014-09. Upon adoption, an entity may apply the new guidance either retrospectively to each prior reporting period presented, or using modified retrospectiveapproach which will result in the recording of the cumulative effect of applying the standard to customer contracts not yet completed as of the date of adoption in the beginning retained earnings balance at the date of the initial application. The Company is currently evaluating the impact of the new standard on the Company’s consolidated financial statements.

Inventories. Inventories, which include materials and conversion costs, are stated at the lower of cost or market, using a first-in, first-out method. We periodically review these values to ascertain that market value of the inventory continues to exceed its recorded cost. Generally, reductions in inventory value below cost are caused by technological obsolescence of the inventory.

We regularly review inventory quantities on hand and, when necessary, record provisions for excess and obsolete inventory based on either our forecasted product demand and production requirements or historical trailing usage of the product. If our sales do not materialize as planned or at historical levels, we may have to increase our reserve for excess and obsolete inventory, which would reduce our earnings. If actual market conditions are more favorable than anticipated, inventory previously written down may be sold, resulting in lower cost of revenue and higher income from operations than expected in that period.

Valuation of Long-lived Assets. The purchase price we pay for acquired companies is allocated first to the identifiable assets acquired and liabilities assumed at their fair value. Any excess purchase price is then allocated to goodwill. We make various assumptions and estimates in order to assign fair value to acquired tangible and intangible assets and liabilities.  These assumptions typically include cash flow forecasts, discount rates, technology royalty rates, and customer attrition rates, among others. Actual cash flows may vary from forecasts used to value these assets at the time of the business combination.

Our most significant identifiable intangible assets are customer relationships, acquired technologies, trademarks and trade names. In addition to our review of the carrying value of each asset, the useful life assumption for each asset, including the classification of certain intangible assets as “indefinite lived,” are reviewed on a periodic basis to determine if changes in circumstances warrant revisions to them. All definite-lived intangible assets are amortized over the periods in which their economic benefits are expected to be realized.

Impairment analyses of goodwill and indefinite-lived intangible assets are conducted in accordance with ASC 350, “Intangibles—Goodwill and Other.” We test our goodwill balances annually as of the beginning of the second quarter or more frequently if indicators are present or changes in circumstances suggest that an impairment may exist. Should the fair value of the Company’s goodwill or indefinite-lived intangible assets decline because of reduced operating performance, market declines, or other indicators of impairment, or as a result of changes in the discount rate, charges for impairment loss may be necessary. In performing the test, we utilize the two-step approach which requires a comparison of the carrying value of each of our reporting units to the fair value of these reporting units. The Company’s product lines generally correspond with its reporting units which is the level at which the Company evaluates its goodwill, intangible assets and other long-lived assets for impairment. If the carrying value of a reporting unit exceeds its fair value, we calculate the implied fair value of the reporting unit’s goodwill and compare it to the carrying value. If the carrying value of goodwill exceeds its implied fair value, an impairment charge is recorded for the difference. The fair value of a reporting unit is primarily based on a discounted cash flow (“DCF”) method. The DCF approach requires that we forecast future cash flows for each of the reporting units and discount the cash flow streams based on a weighted average cost of capital (“WACC”) that is derived, in part, from comparable companies within similar industries. The DCF calculations also include a terminal value calculation that is based upon an expected long-term growth rate for the applicable reporting unit. The carrying values of each reporting unit include assets and liabilities which relate to the reporting unit’s operations. Additionally, reporting units that benefit from corporate assets or liabilities are allocated a portion of those corporate assets and liabilities on a proportional basis.

We assess indefinite-lived intangible assets for impairment on an annual basis, and more frequently if impairment indicators are identified. We also periodically reassess their continuing classification as indefinite-lived intangible assets. Impairment exists if the fair value of the intangible asset is less than its carrying value. An impairment charge equal to the difference is recorded to reduce the carrying value to its fair value.

We evaluate amortizable intangible assets and other long-lived assets for impairment in accordance with ASC 360-10-35-15, “Impairment or Disposal of Long-Lived Assets,” whenever changes in events or circumstances indicate that carrying values may exceed their undiscounted cash flow forecasts. If undiscounted cash flow forecasts indicate that the carrying value of a definite-lived

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intangible asset or other long-lived asset may not be recoverable, a fair value assessment is performed. For intangible assets, fair value estimates are derived from discounted cash flow forecasts. For other long-lived assets (primarily property, plant and equipment), fair value estimates are derived from the sources most appropriate for the particular asset and have historically included such approaches as sales comparison approach and replacement cost approach. If fair value is less than carrying value, an impairment charge equal to the difference is recorded. We also review the useful life and residual value assumptions for definite-lived intangible assets and other long-lived assets on a periodic basis to determine if changes in circumstances warrant revisions to them.

Factors which may trigger an impairment of our goodwill, intangible assets and other long-lived assets include the following:

· underperformance relative to historical or projected future operating results;

· changes in our use of the acquired assets or the strategy for our overall business;

· negative industry or economic trends;

· interest rate changes;

· technological changes or developments;

· changes in competition;

· loss of key customers or personnel;

· adverse judicial or legislative outcomes or political developments;

· significant declines in our stock price for a sustained period of time; and

· the decline of our market capitalization below net book value as of the end of any reporting period.

The occurrence of any of these events or any other unforeseeable events or circumstances that materially affects future operating results or cash flows may cause an impairment that is material to our results of operations or financial position in the reporting period in which it occurs or is identified.

The most recent annual goodwill and indefinite-lived intangible asset impairment test was performed as of the beginning of the second quarter of 2015, noting no impairment. With the exception of our NDS reporting unit, implied fair values of all reporting units exceeded their carrying values by at least 20%. As of December 31, 2015, there were no indicators of impairment of our long-lived assets.

We maintain a significant balance in our goodwill, intangible assets and other long-lived assets. The following table shows the breakdown of goodwill, intangibles and property, plant and equipment by reportable segment as of December 31, 2015 (in thousands):

	Goodwill		Intangible Assets, net		Property, Plant & Equipment, net
Laser Products	$	33,860	$	25,831	$	10,282
Vision Technologies		52,679		34,685		12,684
Precision Motion		16,917		5,753		4,980
Unallocated Corporate and Shared Services		—		—		12,604
Total	$	103,456	$	66,269	$	40,550

Contingent Consideration. The purchase price we pay for acquired companies may include a contingent consideration obligation. Contingent consideration is typically measured at fair value at the acquisition date using the Monte Carlo valuation method, and is payable to the former shareholders of the acquired company based on the achievement of certain performance targets. Any increases or decreases in the estimated fair value of contingent consideration liabilities subsequent to the acquisition date are recorded in the consolidated statement of operations as acquisition related costs until the liability is fully settled. As of December 31, 2015, the Company may have to pay up to $10.3 million contingent consideration related to all acquisitions with open contingency periods. As of December 31, 2015, the Company has recorded an estimated fair value of $3.9 million contingent consideration obligations relating to its acquisitions of Skyetek, Lincoln Laser and Applimotion.

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Pension Plans. Our subsidiary located in the U.K. maintains a defined benefit pension plan (the “U.K. Plan”).The U.K. Planwas closed to new membership in 1997 and stopped accruing for additional pension benefits for existing members in 2003, limiting our obligation to benefits earned through that date. Benefits under this plan were based on the employees’ years of service and compensation as of the date the plan was frozen, adjusted for inflation. At December 31, 2015, the fair market value of the plan assets was $32.4 million, which was $3.5 million,or 9.9%, less than the projected benefit obligation of $35.9 million.

The cost and obligations of our U.K. Plan are calculated using many assumptions. Major assumptions used in the accounting for this pension plan include the discount rate, rate of inflation, mortality rate and expected return on plan assets. Assumptions are determined each year based on data and appropriate market indicators in consultation with a third-party actuary. Should any of these assumptions change, they would have an effect on net periodic pension cost and the unfunded benefit obligation at year end. The most sensitive assumption affecting the determination of our U.K. Plan pension obligation is the discount rate.  A 50 basis point decrease in the discount rate as of December 31, 2015 would change the pension obligation by $3.3 million.

Restructuring Charges. In accounting for our restructuring activities, we follow the provisions of ASC 420, “Exit or Disposal Cost Obligations”. In accounting for these obligations, we make assumptions related to the amount of employee severance and benefits related costs, the time period over which facilities will remain vacant, sublease terms, sublease rates, and discount rates. Additionally, we make assumptions on the estimated remaining useful lives of assets being restructured and the residual value of the assets. Estimates and assumptions are based on the best information available at the time the obligation has arisen. These estimates are reviewed and revised as facts and circumstances dictate. Changes in these estimates could have a material effect on the amount previously expensed against our earnings and currently accrued on our consolidated balance sheet.

Accounting for Income Taxes. As part of the process of preparing our consolidated financial statements, we are required to calculate our income tax provision (benefit) in each of the jurisdictions in which we operate. This process involves estimating our current income tax provision (benefit) together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are reported on our consolidated balance sheet.

Judgment is required in determining our worldwide income tax provision. In the ordinary course of a global business, there are many transactions and calculations where the ultimate outcome is uncertain. Although we believe our estimates are reasonable, no assurance can be given that the final outcome of these matters will not be different from that which is reflected in our historical income tax provisions and accruals. Such differences could have a material impact on our income tax provision and net income in the period in which such determination is made.

We record a valuation allowance on our deferred tax assets when it is more likely than not that they will not be realized. We have considered future taxable income and ongoing prudent and feasible tax planning strategies in assessing the need for a valuation allowance. In the event we determine that we are able to realize our deferred tax assets in the future in excess of their net recorded amount, an adjustment to the valuation allowance for the deferred tax assets would be recorded and would increase our net income in the period such determination is made. Likewise, should we determine that we will not be able to realize all or part of our net deferred tax assets in the future, an adjustment to the valuation allowance for the deferred tax assets will be recorded and will reduce our net income in the period such determination is made.

In conjunction with our ongoing review of our actual results and anticipated future earnings, we continuously reassess the possibility of increasing the valuation allowance currently in place on our deferred tax assets. We released $0.8 million valuation allowance against state net operating loss carryforwards during the year ended December 31, 2015. The decrease of our valuation allowance was determined in accordance with the provisions of ASC 740, “Income Taxes,” which requires an assessment of both positive and negative evidence when determining whether it is more likely than not that deferred tax assets are recoverable. Such assessment is required on a jurisdiction by jurisdiction basis. Based on historical operating income and continuing projected income, future reversals of temporary differences and tax planning strategies, we have concluded that sufficient negative evidence indicates that it is not more likely than not that deferred tax assets will be realized.

The amount of income taxes we pay is subject to audits by federal, state and foreign tax authorities, which may result in proposed assessments. We believe that we have adequately provided for any reasonably foreseeable outcome related to these matters. However, our future results may include favorable or unfavorable adjustments to our tax liabilities in the period that the assessments are made or resolved, or when the statute of limitations for certain periods expires. As of December 31, 2015, the total amount of gross unrecognized tax benefits was $5.5 million, of which $4.1 million would favorably affect our effective tax rate, if recognized. As of December 31, 2014, the amount of gross unrecognized tax benefits totaled approximately $6.3, of which $4.1 million would favorably affect our effective tax rate, if recognized. Over the next twelve months, the Company may need to record up to $1.2 million of previously unrecognized tax benefits in the event of statute of limitations closures.

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Income and foreign withholding taxes have not been recognized on the excess of the amount for financial reporting purposes over the tax basis of investments in foreign subsidiaries that are essentially permanent in nature. This amount becomes taxable upon a repatriation of assets from a subsidiary or a sale or liquidation of a subsidiary. The amount of undistributed earnings of foreign subsidiaries totaled $18.2 million as of December 31, 2015. The estimated unrecognized deferred income tax liabilities on this temporary difference is approximately $0.4 million.

Loss Contingencies. We are subject to legal proceedings, lawsuits and other claims relating to labor, service and other matters arising in the ordinary course of business. Quarterly, we review the status of each significant matter and assess our potential financial exposure. If the potential loss from any claim or legal proceeding is considered probable and the amount can be reasonably estimated, we accrue a liability for the estimated loss. Significant judgment is required in both the determination of probability and the determination as to whether an exposure is reasonably estimable. Because of uncertainties related to these matters, accruals are based only on the best information available at the time. As additional information becomes available, we reassess the potential liability related to our pending claims and litigation and may revise our estimates. Such revisions in the estimates of the potential liabilities could have a material impact on our results of operations and financial position. We expense legal fees as incurred.

Recent Accounting Pronouncements

See Note 2 to Consolidated Financial Statements for recent accounting pronouncements that could have an effect on us.

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

We are exposed to market risk from changes in foreign currency exchange rates and interest rates, which could affect our operating results, financial position and cash flows. We manage our exposure to these market risks through our regular operating and financing activities. We generally do not enter into derivative financial instruments to manage foreign currency exposure.

Foreign Currency Exchange Rate Risk and Sensitivity

We are exposed to changes in foreign currency exchange rates which could affect operating results as well as our financial position and cash flows. The primary foreign currency denominated transactions include revenue and expenses and the resulting accounts receivable and accounts payable balances reflected on our balance sheet. Therefore, the change in the value of the U.S. dollar compared to foreign currencies will have either a positive or negative effect on our financial position and results of operations. Historically, our primary exposure has related to transactions denominated in the Euro, British Pound and Japanese Yen.

A hypothetical depreciation of 10% in foreign currency exchange rate, primarily cumulative translation adjustments from the quoted foreign currency exchange rates as of December 31, 2015 would impact shareholder equity by $11.0 million or 4%. We did not hold foreign currency derivative contracts as of December 31, 2015.

Interest Rates

Our exposure to market risk associated with changes in interest rates relates primarily to our debt obligations. We have $97.5 million of outstanding variable rate debt as of December 31, 2015. A 100 basis point increase in interest rates at December 31, 2015 would increase our annual pre-tax interest expense by approximately $1.0 million. We do not actively trade derivative financial instruments, but may use them in the future to manage interest rate positions associated with our debt instruments. We did not hold interest rate derivative contracts as of December 31, 2015.

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Item 8. Financial Statements and Supplementary Data

GSI GROUP INC.

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm – PricewaterhouseCoopers LLP	45
Consolidated Balance Sheets as of December 31, 2015 and 2014	46
Consolidated Statements of Operations for the years ended December 31, 2015, 2014 and 2013	47
Consolidated Statements of Comprehensive Income (Loss) for the years ended December 31, 2015, 2014 and 2013	48
Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2015, 2014 and 2013	49
Consolidated Statements of Cash Flows for the years ended December 31, 2015, 2014 and 2013	50
Notes to Consolidated Financial Statements	51

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Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of GSI Group Inc.

In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of operations, comprehensive income (loss), stockholders’ equity and cash flows present fairly, in all material respects, the financial position of GSI Group Inc. and its subsidiaries at December 31, 2015 and December 31, 2014, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2015 in conformity with accounting principles generally accepted in the United States of America.  Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company's management is responsible for these financial statements, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in Management’s Annual Report on Internal Controls Over Financial Reporting appearing under Item 9A.  Our responsibility is to express opinions on these financial statements and on the Company's internal control over financial reporting based on our integrated audits.  We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States).  Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects.  Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation.  Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk.  Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

As discussed in Note 2 to the consolidated financial statements, the Company changed the manner in which it accounts for the classification of deferred taxes in the consolidated balance sheets in 2015.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.  A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements.  Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts

March 2, 2016

45

GSI GROUP INC.

CONSOLIDATED BALANCE SHEETS

(In thousands of U.S. dollars or shares)

	December 31,			December 31,
	2015			2014
ASSETS
Current Assets
Cash and cash equivalents	$	59,959		$	51,146
Accounts receivable, net of allowance of $500 and $282, respectively		57,188			51,494
Inventories		59,566			62,943
Income taxes receivable		2,510			5,906
Deferred tax assets		—			5,971
Prepaid expenses and other current assets		5,989			5,081
Assets of discontinued operations		—			631
Total current assets		185,212			183,172
Property, plant and equipment, net		40,550			40,088
Deferred tax assets		7,885			2,912
Other assets		12,673			12,134
Intangible assets, net		66,269			67,242
Goodwill		103,456			90,746
Total assets	$	416,045		$	396,294
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current Liabilities
Current portion of long-term debt	$	7,385		$	7,345
Accounts payable		24,401			25,592
Income taxes payable		3,985			1,189
Deferred tax liabilities		—			208
Accrued expenses and other current liabilities		21,182			19,401
Liabilities of discontinued operations		—			324
Total current liabilities		56,953			54,059
Long-term debt		88,426			105,030
Deferred tax liabilities		449			35
Income taxes payable		6,071			7,097
Other liabilities		19,445			18,819
Total liabilities		171,344			185,040
Commitments and Contingencies (Note 15)
Stockholders’ Equity:
Common shares, no par value; Authorized shares: unlimited;    Issued and outstanding: 34,345 and 34,219, respectively		423,856			423,856
Additional paid-in capital		29,225			28,590
Accumulated deficit		(189,550	)		(225,165	)
Accumulated other comprehensive loss		(18,830	)		(16,456	)
Total GSI Group Inc. stockholders’ equity		244,701			210,825
Noncontrolling interest		—			429
Total stockholders’ equity		244,701			211,254
Total liabilities and stockholders’ equity	$	416,045		$	396,294

The accompanying notes are an integral part of these consolidated financial statements.

46

GSI GROUP INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands of U.S. dollars or shares, except per share amounts)

	Year Ended December 31,
	2015			2014			2013
Revenue	$	373,598		$	364,706		$	316,910
Cost of revenue		215,708			214,539			184,683
Gross profit		157,890			150,167			132,227
Operating expenses:
Research and development and engineering		31,043			28,954			23,787
Selling, general and administrative		82,049			84,380			76,337
Amortization of purchased intangible assets		7,611			10,262			7,270
Restructuring, acquisition and divestiture related costs		8,254			1,935			5,387
Impairment of goodwill and intangible assets		—			41,442			—
Total operating expenses		128,957			166,973			112,781
Operating income (loss) from continuing operations		28,933			(16,806	)		19,446
Interest income (expense), net		(5,180	)		(5,096	)		(3,468	)
Foreign exchange transaction gains (losses), net		(23	)		1,281			(1,301	)
Other income (expense), net		2,663			2,706			1,500
Gain on disposal of business		19,629			—			—
Income (loss) from continuing operations before income taxes		46,022			(17,915	)		16,177
Income tax provision (benefit)		10,394			(1,006	)		6,200
Income (loss) from continuing operations		35,628			(16,909	)		9,977
Loss from discontinued operations, net of tax		(13	)		(5,607	)		(2,054	)
Loss on disposal of discontinued operations, net of tax		—			(1,726	)		(592	)
Consolidated net income (loss)		35,615			(24,242	)		7,331
Less: Net income attributable to noncontrolling interest		—			(10	)		(22	)
Net income (loss) attributable to GSI Group Inc.	$	35,615		$	(24,252	)	$	7,309
Earnings (loss) per common share from continuing operations:
Basic	$	1.03		$	(0.49	)	$	0.29
Diluted	$	1.02		$	(0.49	)	$	0.29
Loss per common share from discontinued operations:
Basic	$	(0.00	)	$	(0.21	)	$	(0.08	)
Diluted	$	(0.00	)	$	(0.21	)	$	(0.08	)
Earnings (loss) per common share attributable to GSI Group Inc.:
Basic	$	1.03		$	(0.70	)	$	0.21
Diluted	$	1.02		$	(0.70	)	$	0.21
Weighted average common shares outstanding—basic		34,579			34,352			34,073
Weighted average common shares outstanding—diluted		34,827			34,352			34,396
Amounts attributable to GSI Group Inc.:
Income (loss) from continuing operations	$	35,628		$	(16,909	)	$	9,977
Loss from discontinued operations		(13	)		(7,343	)		(2,668	)
Net income (loss)	$	35,615		$	(24,252	)	$	7,309

The accompanying notes are an integral part of these consolidated financial statements.

47

GSI GROUP INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(In thousands of U.S. dollars)

	Year Ended December 31,
	2015			2014			2013
Consolidated net income (loss)	$	35,615		$	(24,242	)	$	7,331
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax (1)		(4,083	)		(6,968	)		54
Pension liability adjustments, net of tax (2)		1,709			(3,146	)		3,353
Total other comprehensive income (loss)		(2,374	)		(10,114	)		3,407
Total consolidated comprehensive income (loss)		33,241			(34,356	)		10,738
Less: Comprehensive income attributable to noncontrolling interest		—			(10	)		(22	)
Comprehensive income (loss) attributable to GSI Group Inc.	$	33,241		$	(34,366	)	$	10,716

(1) The tax effect on this component of comprehensive income was $193, $622 and $477 in 2015, 2014 and 2013, respectively.

(2) The tax effect on this component of comprehensive income was $307, ($906) and $900 in 2015, 2014 and 2013, respectively.

The accompanying notes are an integral part of these consolidated financial statements.

48

GSI GROUP INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands of U.S. dollars or shares)

	GSI Group Inc. Stockholders
	Capital Stock					Additional Paid-In			Accumulated Other Comprehensive			Retained Earnings (Accumulated			Noncontrolling
	#ofShares			Amount		Capital			Income (Loss)			Deficit)			Interest			Total
Balance at December 31, 2012		33,796		$	423,856	$	21,924		$	(9,749	)	$	(208,222	)	$	397		$	228,206
Net income		—			—		—			—			7,309			22			7,331
Issuance of common stock upon vesting of non-vested stock awards		395			—		—			—			—			—			—
Repurchase of common stock		(50	)		—		(526	)		—			—			—			(526	)
Share-based compensation		—			—		5,624			—			—			—			5,624
Net settlement of vested stock awards		(150	)		—		(1,495	)		—			—			—			(1,495	)
Tax benefit (shortfalls) of vested stock awards		—			—		(144	)		—			—			—			(144	)
Other comprehensive income, net of tax		—			—		—			3,407			—			—			3,407
Balance at December 31, 2013		33,991			423,856		25,383			(6,342	)		(200,913	)		419			242,403
Net loss		—			—		—			—			(24,252	)		10			(24,242	)
Issuance of common stock upon vesting of non-vested stock awards		362			—		—			—			—			—			—
Share-based compensation		—			—		4,659			—			—			—			4,659
Net settlement of vested stock awards		(134	)		—		(1,666	)		—			—			—			(1,666	)
Tax benefit (shortfalls) of vested stock awards		—			—		214			—			—			—			214
Other comprehensive loss, net of tax		—			—		—			(10,114	)		—			—			(10,114	)
Balance at December 31, 2014		34,219			423,856		28,590			(16,456	)		(225,165	)		429			211,254
Net income		—			—		—			—			35,615			—			35,615
Issuance of common stock upon vesting of non-vested stock awards		398			—		—			—			—			—			—
Repurchase of common stock		(122	)		—		(1,627	)		—			—			—			(1,627	)
Share-based compensation		—			—		4,065			—			—			—			4,065
Net settlement of vested stock awards		(150	)		—		(1,941	)		—			—			—			(1,941	)
Tax benefit (shortfalls) of vested stock awards		—			—		138			—			—			—			138
Other comprehensive loss, net of tax		—			—		—			(2,374	)		—			—			(2,374	)
Dissolution of minority interest		—			—		—			—			—			(429	)		(429	)
Balance at December 31, 2015		34,345		$	423,856	$	29,225		$	(18,830	)	$	(189,550	)	$	—		$	244,701

The accompanying notes are an integral part of these consolidated financial statements.

49

GSI GROUP INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands of U.S. dollars)

	Year Ended December 31,
	2015			2014			2013
Cash flows from operating activities:
Consolidated net income (loss)	$	35,615		$	(24,242	)	$	7,331
Less: Loss from discontinued operations, net of tax		13			7,333			2,646
Income (loss) from continuing operations		35,628			(16,909	)		9,977
Adjustments to reconcile income (loss) from continuing operations to    net cash provided by operating activities of continuing operations:
Depreciation and amortization		19,114			23,797			19,570
Provision for inventory excess and obsolescence		1,934			832			1,582
Impairment of goodwill and intangible assets		—			41,442			—
Share-based compensation		4,387			4,329			5,442
Deferred income taxes		(1,692	)		(6,736	)		3,886
Earnings from equity-method investment		(2,657	)		(2,700	)		(1,469	)
Gain on disposal of business		(19,629	)		—			—
Contingent consideration adjustment		430			—			—
Non-cash interest expense		935			1,379			965
Other non-cash items		1,408			1,586			1,230
Changes in assets and liabilities which provided (used) cash, excluding    effects from businesses purchased or classified as held for sale:
Accounts receivable		(7,526	)		3,526			(1,826	)
Inventories		(3,338	)		(991	)		(1,688	)
Prepaid expenses and other current assets		902			(527	)		854
Income taxes receivable		3,431			(206	)		10,848
Accounts payable, income taxes payable, accrued expenses    and other current liabilities		2,167			(4,698	)		5,958
Other non-current assets and liabilities		(2,065	)		(134	)		849
Cash provided by operating activities of continuing operations		33,429			43,990			56,178
Cash used in operating activities of discontinued operations		(13	)		(1,701	)		(6,978	)
Cash provided by operating activities		33,416			42,289			49,200
Cash flows from investing activities:
Purchases of property, plant and equipment		(5,552	)		(5,415	)		(4,777	)
Acquisition of businesses, net of cash acquired and escrow recovery		(25,987	)		(88,238	)		(80,773	)
Proceeds from the sale of business, net of transaction costs		29,570			—			—
Proceeds from the sale of property, plant and equipment		127			112			253
Cash used in investing activities of continuing operations		(1,842	)		(93,541	)		(85,297	)
Cash provided by investing activities of discontinued operations		209			3,768			12,341
Cash used in investing activities		(1,633	)		(89,773	)		(72,956	)
Cash flows from financing activities:
Borrowings under revolving credit facility		13,000			77,000			60,000
Repayments of long-term debt and revolving credit facility		(30,500	)		(33,500	)		(38,500	)
Payments for debt issuance costs		—			(712	)		(145	)
Payments of withholding taxes from stock-based awards		(1,941	)		(1,666	)		(1,495	)
Repurchase of common stock		(1,627	)		—			(526	)
Other financing activities		(467	)		(841	)		(760	)
Cash provided by (used in) financing activities of continuing operations		(21,535	)		40,281			18,574
Cash provided by (used in) financing activities of discontinued operations		—			—			—
Cash provided by (used in ) financing activities		(21,535	)		40,281			18,574
Effect of exchange rates on cash and cash equivalents		(1,435	)		(2,631	)		374
Increase (decrease) in cash and cash equivalents		8,813			(9,834	)		(4,808	)
Cash and cash equivalents, beginning of year		51,146			60,980			65,788
Cash and cash equivalents, end of year	$	59,959		$	51,146		$	60,980
Supplemental disclosure of cash flow information:
Cash paid for interest	$	3,784		$	3,793		$	2,291
Cash paid for income taxes	$	10,688		$	6,087		$	2,197
Income tax refunds received	$	3,939		$	931		$	12,607
Supplemental disclosure of non-cash investing activity:
Accrual for capital expenditures	$	1,180		$	26		$	184
Supplemental disclosure of non-cash financing activity:
Assets acquired under capital lease obligation	$	—		$	10,438		$	—

The accompanying notes are an integral part of these consolidated financial statements.

50

GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

AS OF DECEMBER 31, 2015

1. Organization and Presentation

GSI Group Inc. and its subsidiaries (collectively referred to as the “Company”, “we”, “us”, “our”) design, develop, manufacture and sell precision photonic and motion control components and subsystems to Original Equipment Manufacturers (“OEM’s”) in the medical and advanced industrial markets. Our highly engineered enabling technologies include CO2 laser sources, laser scanning and beam delivery products, optical data collection and machine vision technologies, medical visualization and informatics solutions, and precision motion control products. We specialize in collaborating with OEM customers to adapt our component and subsystem technologies to deliver highly differentiated performance in their applications.

Basis of Presentation

These consolidated financial statements have been prepared by the Company in U.S. dollars and in accordance with U.S. generally accepted accounting principles, applied on a consistent basis.

The consolidated financial statements include the accounts of GSI Group Inc. and its wholly owned subsidiaries. Intercompany accounts and transactions have been eliminated. In 2015, the Company’s 50% owned joint venture, Excel Laser Technology Private Limited (the “India JV”), was deconsolidated as the Company sold 100% of its interest in the India JV. The accounts of the India JV were previously included in discontinued operations in the consolidated financial statements.  

The Company has a 41% ownership interest in Laser Quantum Ltd. (“Laser Quantum”), a privately held company located in the United Kingdom. The Company records the results of this entity under the equity method as it does not have a controlling interest in the entity.

The Company has evaluated subsequent events from December 31, 2015 through the date of the issuance of these consolidated financial statements and has determined that no material subsequent events have occurred that would affect the information presented in these consolidated financial statements.

2. Summary of Significant Accounting Policies

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the dates of the financial statements, and the reported amounts of revenue and expenses during the reporting periods. The Company evaluates its estimates based on historical experience, current conditions and various other assumptions that it believes are reasonable under the circumstances. Estimates and assumptions are reviewed on an on-going basis and the effects of revisions are reflected in the period in which they are deemed to be necessary. Actual results could differ significantly from those estimates.

Foreign Currency Translation

The financial statements of the Company and its subsidiaries outside the United States have been translated into U.S. dollars. Assets and liabilities of foreign operations are translated from foreign currencies into U.S. dollars at the exchange rates in effect on the balance sheet date. Revenue and expenses are translated at the average exchange rate in effect for the period. Accordingly, gains and losses resulting from translating foreign currency financial statements are reported as cumulative translation adjustment, a separate component of other comprehensive income (loss) in stockholders’ equity. Foreign currency transaction gains and losses, primarily from transactions denominated in currencies other than the functional currency, are included in the accompanying consolidated statements of operations.

Cash and Cash Equivalents

Cash equivalents, primarily money market accounts, are highly liquid investments with original maturities of three months or less. These investments are carried at cost, which approximates fair value.

51

GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Long-Term Investments

At December 31, 2015 and 2014, the Company had a 41% equity investment in Laser Quantum, a privately held company located in the United Kingdom. During the second quarter of 2013, the Company’s ownership percentage increased from 25% to 41% as a result of a stock buyback program by Laser Quantum. The Company continues to use the equity method to record the results of this entity as it does not have a controlling interest in the entity. The Company recognized investment income of $2.7 million, $2.7 million and $1.5 million during 2015, 2014 and 2013, respectively, which is included in other income (expense) in the accompanying consolidated statements of operations. The Company’s net investment in Laser Quantum was $10.1 million and $8.0 million at December 31, 2015 and 2014, respectively, and is included in other long-term assets in the accompanying consolidated balance sheets.

The summarized financial information for Laser Quantum is as follows (in thousands):

	Year Ended December 31,
	2015		2014		2013
Revenue	$	25,599	$	23,013	$	16,269
Income from operations	$	7,362	$	7,434	$	4,720
Net income	$	6,925	$	6,627	$	3,745

	December 31,
	2015		2014
Total assets (1)	$	30,159	$	25,423
Total liabilities	$	2,552	$	2,482

(1) Total assets at December 31, 2015 and 2014 included cash and cash equivalent of $21.0 million and $17.1 million, respectively.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable are recorded at the invoiced amount. The Company maintains an allowance for doubtful accounts based on the Company’s best estimate of probable credit losses resulting from the inability of the Company’s customers to make required payments. The Company determines the allowance based on a variety of factors, including the age of amounts outstanding relative to their contractual due date, specific customer factors, and other known risks and economic trends. Charges related to the allowance for doubtful accounts are included as selling, general and administrative expenses and are recorded in the period that the outstanding receivables are determined to be uncollectible. Account balances are charged off against the allowance when the Company believes it is probable that the receivable will not be recovered.

For the years ended December 31, 2015, 2014 and 2013, changes in the allowance for doubtful accounts were as follows (in thousands):

	2015			2014			2013
Balance at beginning of year	$	282		$	575		$	294
Provision charged to selling, general and administrative expenses		285			30			301
Allowance resulting from acquisitions		5			52			117
Write-offs, net of recoveries of amounts previously reserved		(29	)		(352	)		(159	)
Divestiture of JK Lasers		(30	)		—			—
Exchange rate changes		(13	)		(23	)		22
Balance at end of year	$	500		$	282		$	575

Inventories

Inventories, which include materials and conversion costs, are stated at the lower of cost or market, using the first-in, first-out method. Market is defined as replacement cost for raw materials and net realizable value for other inventories. Demo inventory is recorded at the lower of cost or its net realizable value. The Company periodically reviews quantities of inventories on hand and

52

GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

compares these amounts to the expected use of each product. The Company records a charge to cost of revenue for the amount required to reduce the carrying value of inventory to net realizable value. Costs associated with the procurement of inventories such as inbound freight charges, purchasing and receiving costs are capitalized in inventory on the consolidated balance sheets.

Property, Plant and Equipment

Property, plant and equipment are recorded at cost, adjusted for any impairment, less accumulated depreciation. The Company uses the straight-line method to calculate the depreciation of its fixed assets over their estimated useful lives. Estimated useful lives range from 3 to 30 years for buildings and building improvements and 1 to 10 years for machinery and equipment. Leasehold improvements are depreciated over the lesser of their useful lives or lease terms, including any renewal period options that are reasonably assured of being exercised. Repairs and maintenance costs are expensed as incurred. Certain costs to develop software for internal use are capitalized when the criteria under Accounting Standards Codification (“ASC”) 350-40, “Internal-Use Software,” are met. Lease arrangements meeting the criteria of ASC 840-30, “Leases – Capital Leases,” are capitalized based on the present value of future lease payments and depreciated over the term of the lease.

Goodwill, Intangibles and Long-Lived Assets

Goodwill represents the excess of the purchase price over the tangible assets, identifiable intangible assets and assumed liabilities acquired in a business combination. Allocations of the purchase price are based upon a valuation of assets and liabilities acquired. Assets acquired and liabilities assumed are recorded at their estimated fair values as of the acquisition date. The fair values of intangible assets are based on valuations using an income approach, with estimates and assumptions provided by management of the acquired companies and the Company. Goodwill and indefinite-lived intangibles are not amortized but are assessed for impairment at least annually to ensure their current fair values exceed their carrying values.

The Company’s most significant intangible assets are patents and acquired technologies, customer relationships, trademarks and trade names. All definite-lived intangible assets are amortized over the periods in which their economic benefits are expected to be realized. The Company reviews the useful life assumptions, including the classification of certain intangible assets as “indefinite-lived”, on a periodic basis to determine if changes in circumstances warrant revisions to them.

The Company’s product lines generally correspond with its reporting units which is the level at which the Company evaluates its goodwill, intangible assets and other long-lived assets for impairment.

Impairment Charges

Impairment analyses of goodwill and indefinite-lived intangible assets are conducted in accordance with ASC 350, “Intangibles—Goodwill and Other”. This guidance specifies that goodwill and other intangible assets must be periodically tested for impairment. The Company tests its goodwill balances annually as of the beginning of the second quarter or more frequently if indicators are present or changes in circumstances suggest that an impairment may exist. The Company utilizes a quantitative analysis to test goodwill for impairment. This two-step approach requires a comparison of the carrying value of each of the Company’s reporting units to the fair value of these reporting units. The fair value of a reporting unit is primarily based on a discounted cash flow (“DCF”) method with a weighted average cost of capital. If the carrying value of a reporting unit exceeds its fair value, the Company calculates the implied fair value of the reporting unit’s goodwill and compares it to the goodwill’s carrying value. If the carrying value of the goodwill exceeds its implied fair value, an impairment charge is recorded for the difference.

The Company assesses indefinite-lived intangible assets for impairment on an annual basis as of the beginning of the second quarter, and more frequently if indicators are present or changes in circumstances suggest that an impairment may exist. The Company will also reassess the continuing classification of these indefinite-lived intangible assets as indefinite-lived when circumstances change such that the useful life may no longer be indefinite. The fair values of the Company’s indefinite-lived intangible assets are determined using the relief from royalty method, based on forecasted revenues. If the fair value of an indefinite-lived intangible asset is less than its carrying value, an impairment charge is recorded for the difference between the carrying value and the fair value of the impaired asset.

53

GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

The carrying amounts of definite-lived long-lived assets are reviewed for impairment whenever changes in events or circumstances indicate that their carrying values may not be recoverable. The recoverability of carrying value is generally determined by comparison of the asset group’s carrying value to its undiscounted future cash flows. When this test indicates the potential for impairment, a fair value assessment is performed. Once an impairment is determined and measured, an impairment charge is recorded for the difference between the carrying value and the fair value of the impaired asset.

Revenue Recognition

The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred, price is fixed or determinable, and collection of the resulting receivable is reasonably assured. Revenue recognition requires judgment and estimates, which may affect the amount and timing of revenue recognized in any given period.

The Company’s revenue transactions are comprised of both single-element and multiple-element transactions. Multiple-element transactions may include two or more products and occasionally non-standard/extended warranties, or preventative maintenance plans. For multiple-element transactions, revenue is generally recognized upon shipment, using the relative selling price method in accordance with ASC 605-25 “Revenue – Multiple-Element Arrangements”. Single-element transactions are typically recognized upon shipment at their contractually stated prices.

The Company generally provides warranties for its products. The standard warranty period is typically 12 months to 24 months for the Laser Products and Precision Motion segments and 12 months to 36 months for the Vision Technologies segment. The standard warranty period for product sales is accounted for under the provisions of ASC 450 “Contingencies,” as the Company has the ability to ascertain the likelihood of the liability, and can estimate the amount of the liability. A provision for the estimated cost related to warranty is recorded to cost of revenue at the time revenue is recognized. The Company’s estimate of costs to service the warranty obligations is based on historical experience and expectations of future conditions. To the extent the Company experiences warranty claims or costs associated with servicing those claims that differ from the original estimates, revisions to the estimated warranty liability are recorded at that time.

The Company occasionally sells optional non-standard/extended warranty services and preventative maintenance contracts to customers. The Company accounts for these agreements in accordance with provisions of ASC 605-20-25-3, “Separately Priced Extended Warranty and Product Maintenance Contracts,” under which it recognizes the separately priced extended warranty and preventative maintenance fees ratably over the associated period.

The Company, at the request of its customers, may perform professional services, generally for the maintenance and repair of products previously sold to those customers. These services are usually in the form of time and materials based contracts which are short in duration. Revenue for time and materials services is recorded at the completion of services requested under a customer’s purchase order.

Research and Development and Engineering Costs

Research and development and engineering (“R&D”) expenses are primarily comprised of employee related expenses and cost of materials for R&D projects. These costs are expensed as incurred.

Share-Based Compensation

The Company records the expense associated with share-based compensation awards to employees and directors based on the fair value of awards as of the grant date. For stock-based compensation awards that vest over time based on employment, the associated expenses are recognized in the consolidated statements of operations ratably over the vesting period of the award, net of estimated forfeitures. For performance-based restricted stock units, stock-based compensation expenses are recognized ratably over the vesting period when it is probable that the performance targets are expected to be achieved based on management’s projections. Management’s projections are revised, if necessary, in subsequent periods when underlying factors change the evaluation of the probability of achieving the performance targets. Accordingly, share-based compensation expense associated with performance-based restricted stock units may differ significantly from period to period based on changes to the probability of achieving performance targets.

54

GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Shipping & Handling Costs

Shipping and handling costs are recorded in cost of revenue.

Advertising Costs

Advertising costs are expensed to selling, general and administrative expenses as incurred and were not material for 2015, 2014 and 2013.

Restructuring, Acquisition and Divestiture Related Costs

The Company accounted for its restructuring activities in accordance with the provisions of ASC 420, “Exit or Disposal Cost Obligations.” The Company makes assumptions related to the amounts of employee severance benefits and related costs, the time period over which facilities will remain vacant, useful lives and residual value of long-lived assets, sublease terms, sublease rates and discount rates. Estimates and assumptions are based on the best information available at the time the obligation is recognized. These estimates are reviewed and revised as facts and circumstances dictate.

Acquisition related costs incurred to effect a business combination, including finders’ fees, legal, valuation and other professional or consulting fees, are expensed as incurred. Acquisition related costs also include expenses recognized under earn-out agreements in connection with acquisitions. Expenses associated with divestiture activities, including legal and professional fees directly related to the completion of a business divestiture, are expensed as incurred.

Accounting for Income Taxes

The asset and liability method is used to account for income taxes. Under the asset and liability method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to temporary differences between the financial statement carrying amounts of assets and liabilities and their respective tax bases. This method also requires the recognition of future tax benefits, such as net operating loss carryforwards, to the extent that it is more likely than not that such benefits will be realized. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which the temporary differences are expected to be recovered or settled. A valuation allowance is established to reduce the deferred tax assets if it is more likely than not that some or all of the related tax benefits will not be realized in the future and is reassessed periodically to determine whether it is more likely than not that the tax benefits will be realized in the future and that such valuation should be released.

The majority of the Company’s business activities are conducted through its subsidiaries outside of Canada. Earnings from these subsidiaries are generally indefinitely reinvested in the local businesses. Further, local laws and regulations may also restrict certain subsidiaries from paying dividends to their parents. As such, the Company generally does not accrue income taxes for the repatriation of such earnings in accordance with ASC 740, “Income Taxes.” To the extent that there are excess accumulated earnings that the Company intends to repatriate from any such subsidiaries, the Company recognizes deferred tax liabilities on such foreign earnings.

The Company assesses its income tax positions and records tax benefits for all years subject to examination based on the evaluation of the facts, circumstances, and information available at each reporting date. For those tax positions with a greater than 50 percent likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information, the Company records a tax benefit. For those income tax positions that are not likely to be sustained, no tax benefit is recognized in the consolidated financial statements. The Company recognizes interest and penalties related to uncertain tax positions as part of the provision for income taxes.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Recent Accounting Pronouncements

Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity

In April 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity.” ASU 2014-08 provides guidance on determining when disposals can be presented as discontinued operations. ASU 2014-08 requires that only disposals representing a strategic shift that has (or will have) a major effect on an entity’s operations and financial results should be presented as discontinued operations. A strategic shift may include a disposal of a major line of business, a major equity method investment or a major part of an entity. Additionally, ASU 2014-08 requires expanded disclosures regarding discontinued operations. ASU 2014-08 is effective prospectively for reporting periods beginning after December 15, 2014. The Company adopted this pronouncement in January 2015.

Simplifying the Presentation of Debt Issuance Costs

In April 2015, the FASB issued ASU 2015-03, “Simplifying the Presentation of Debt Issuance Costs.” ASU 2015-03 requires debt issuance related costs to be presented in the balance sheet as a direct reduction to the carrying amount of the associated debt liability, consistent with the presentation of a debt discount. The Company adopted the provisions of ASU 2015-03 retrospectively as of the fiscal quarter ended October 2, 2015. Prior period amounts have been reclassified to conform to the current period presentation. As of December 31, 2014, $0.2 million of debt issuance costs were reclassified from prepaid expenses and other current assets to current portion of long-term debt and $2.5 million was reclassified from other long-term assets to long-term debt in the consolidated balance sheet. Other than these reclassifications, the adoption of ASU 2015-03 did not have an impact on the Company’s consolidated financial statements.

Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement

In April 2015, the FASB issued ASU 2015-05, “Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement,” which provides guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. ASU 2015-05 will be effective for annual and interim reporting periods beginning after December 15, 2015, with early adoption permitted. Upon adoption, an entity may apply the new guidance either retrospectively or prospectively to all arrangements entered into or materially modified after the effective date. The Company does not expect the adoption of ASU 2015-05 to have a material impact on the Company’s consolidated financial statements.

Business Combinations

In September 2015, the FASB issued ASU 2015-16, “Business Combinations,” which requires an acquirer to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 requires an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment had been recognized at the acquisition date. ASU 2015-16 will be effective prospectively for reporting periods beginning after December 15, 2015. The Company does not expect the adoption of ASU 2015-06 to have a material impact on the Company’s consolidated financial statements.

Balance Sheet Classification of Deferred Taxes

In November 2015, the FASB issued ASU 2015-17, “Income Taxes – Balance Sheet Classification of Deferred Taxes,” which simplifies the presentation of deferred income taxes. Under the new standard, both deferred tax assets and liabilities are required to be classified as noncurrent in a classified balance sheet. ASU 2015-17 will become effective for annual and interim reporting periods beginning after December 15, 2016, with early adoption allowed. The Company elected to early adopt the provisions of ASU 2015-17 using the prospective method and reported both current and noncurrent deferred tax assets and liabilities as noncurrent on the accompanying consolidated balance sheet as of December 31, 2015. The prior year balances were not retrospectively adjusted.

Leases

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AS OF DECEMBER 31, 2015

In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842),” which provides comprehensive lease accounting guidance.  The standard requires entities to recognize lease assets and liabilities on the balance sheet and to disclose key information about leasing arrangements.   ASU 2016-02 will become effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption allowed.  The Company is currently evaluating the impact of the new guidance on our consolidated financial statements.

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers,” which provides guidance for revenue recognition. ASU 2014-09 supersedes the revenue recognition requirements in ASC 605, “Revenue Recognition,” and requires entities to recognize revenue in a way that depicts the transfer of goods or services to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 will be effective for annual and interim reporting periods beginning after December 15, 2016. Early adoption is not permitted. Upon adoption, an entity may apply the new guidance either retrospectively to each prior reporting period presented or retrospectively only to customer contracts not yet completed as of the date of adoption with the cumulative effect of initially applying the standard recognized in beginning retained earnings at the date of the initial application. In August 2015, the FASB issued ASU 2015-14, “Revenue from Contracts with Customers – Deferral of the Effective Date,” which defers the effective date of ASU 2014-09 by one year, with the option of early adoption as of the original effective date. The amendment in ASU 2015-14 will result in ASU 2014-09 being effective for annual and interim reporting periods beginning after December 15, 2017. The Company is currently evaluating the impact of the new standard on the Company’s consolidated financial statements.

Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern

In August 2014, the FASB issued ASU 2014-15, "Presentation of Financial Statements - Going Concern (Subtopic 205-40)," which requires management to assess a company’s ability to continue as a going concern and to provide related footnote disclosures in certain circumstances. ASU 2014-15 will be effective for annual reporting periods ending after December 15, 2016. Early application is permitted. The Company does not expect the adoption of ASU 2014-15 to have an impact on the Company’s consolidated financial statements.

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

3. Business Combinations

Skyetek

On December 18, 2015, the Company acquired all assets and certain liabilities of Skyetek Inc. (“Skyetek”), a Denver, Colorado-based provider of embedded and standalone RFID solutions for medical OEM’s, for a total purchase price of $2.8 million, subject to customary working capital adjustments. The purchase price includes $2.6 million in cash paid for the acquisition and $0.2 million in estimated fair value of future contingent consideration payable upon the achievement of certain sales order commitment targets from October 2015 through June 2017.The undiscounted range of possible contingent consideration is zero to $0.3 million. Skyetek specializes in high-performing HF and UHF RFID technologies that maximize efficiency and visibility for OEM’s serving the medical and advanced industrial markets. The acquisition creates an expanded range of highly competitive RFID solutions that significantly enhances our value proposition to OEM customers in various industries, but especially within the healthcare industry where there is an ever-growing need for improvements in workflow solutions, patient safety, anti-counterfeiting, and asset tracking throughout the hospital environment.

Lincoln Laser

On November 9, 2015, the Company acquired certain assets and liabilities of Lincoln Laser Company (“Lincoln Laser”), a Phoenix, Arizona-based provider of ultrafast precision polygon scanners and other optical scanning solutions for the medical, food processing, and advanced industrial markets, for a total purchase price of $12.6 million, subject to customary working capital adjustments. This total purchase price includes $10.3 million in cash paid for the acquisition and $2.3 million in estimated fair value of future contingent consideration payable upon the achievement of certain revenue targets for fiscal year 2016. The undiscounted range of contingent consideration is zero to $6.0 million. Lincoln Laser specializes in ultrafast scanning, leveraging their expertise in polygon motor design and electro-optic subsystems. The acquisition creates an expanded range of highly competitive beam delivery technologies.Lincoln Laser contributed revenues of $1.9 million and a loss from continuing operations before income taxes of $0.3 million for the year ended December 31, 2015.

Applimotion

On February 19, 2015, the Company acquired 100% of the outstanding stock of Applimotion Inc. (“Applimotion”), a Loomis, California based provider of advanced precision motor and motion control technology to OEM customers in the medical and advanced industrial markets, for a total purchase price of $14.0 million, net of working capital adjustments. This total purchase price includes $13.0 million in cash paid for the acquisition and $1.0 million in estimated fair value of future contingent considerations payable upon the achievement of certain revenue targets for the fiscal years 2015 to 2017. The undiscounted range of contingent considerations is zero to $4.0 million. Applimotion specializes in motor applications that require highly precise and dynamic motion control. The acquisition enhances our strategic position in precision motion control by enabling us to offer a broader range of motion control technologies and integrated solutions.Applimotion contributed revenues of $14.0 million and income from continuing operations before income taxes of $1.0 million for the year ended December 31, 2015.

The purchase price for Skyetek, Lincoln Laser and Applimotion was allocated as follows (in thousands):

	Amount
Cash	$	331
Accounts receivable		3,166
Inventory		3,544
Prepaid expenses and other current assets		148
Property and equipment		3,220
Intangible assets		11,370
Goodwill		12,710
Other assets		10
Total assets acquired		34,499
Accounts payable		1,681
Other liabilities		1,197
Deferred tax liabilities		2,308

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Total liabilities assumed		5,186
Total assets acquired, net of liabilities assumed		29,313
Less: cash acquired		331
Plus: working capital adjustments		464
Total purchase price, net of cash acquired		29,446
Less: contingent consideration		3,459
Net cash used for acquisition of businesses	$	25,987

As of December 31, 2015, the working capital adjustments for Skyetek and Lincoln Laser had not yet been finalized and were estimated to be an additional payment of less than $0.1 million to Skyetek and an additional cash receipt of $0.5 million from Lincoln Laser. These have been included in accrued expenses and other current liabilities and prepaid expenses and other current assets, respectively, in the consolidated balance sheet.

The fair value of intangible assets for Skyetek, Lincoln Laser and Applimotion is comprised of the following (dollar amounts in thousands):

			Weighted Average
	Estimated Fair		Amortization
	Value		Period
Customer relationships	$	4,266	12 years
Developed technology		4,993	10 years
Trademarks and trade names		593	9 years
Non-compete covenant		684	4 years
Backlog		834	1 year
Total	$	11,370

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

The purchase price allocation resulted in $12.7 million of goodwill and $11.4 million of identifiable intangible assets, $10.3 million of which is expected to be deductible for tax purposes. Intangible assets are being amortized over their weighted average useful lives primarily based upon the pattern in which anticipated economic benefits from such assets are expected to be realized. The goodwill recorded represents the anticipated incremental value of future cash flow potential attributable to: (i) the ability to develop and market new products and technologies; (ii) the ability to develop relationships with new customers; and (iii) expected sales synergies from cross-selling current and future product offerings of Skyetek, Lincoln Laser, Applimotion and the Company to OEM customers.

The results of the SkyeTek, Lincoln Laser and Applimotion acquisitions were included in the Company’s results of operations beginning on the respective acquisition dates. The pro forma financial information reflecting the operating results of Skyetek, Lincoln Laser and Applimotion as if they had been acquired on January 1, 2014 is not presented herein as it would not differ materially from the operating results of the Company as reported for 2014. Skyetek, Lincoln Laser and Applimotion are included in the Company’s Vision Technologies, Laser Products and Precision Motion reportable segments, respectively.

JADAK

On March 14, 2014, the Company acquired 100% of the outstanding equity interests of JADAK, LLC , JADAK Technologies, Inc., and Advanced Data Capture Corporation (collectively, “JADAK”), a North Syracuse, New York-based provider of optical data collection and machine vision technologies to OEM medical device manufacturers, for $93.7 million in cash, net of working capital adjustments. The addition of JADAK has enabled the Company to offer a broader range of highly engineered enabling technologies to leading medical equipment manufacturers.JADAK contributed revenues of $45.4 million and loss from continuing operations before income taxes of $2.7 million for the year ended December 31, 2014.

The final purchase price allocation is as follows (in thousands):

	Amount
Cash	$	1,140
Accounts receivable		7,907
Inventory		6,865
Property and equipment		904
Intangible assets		40,250
Goodwill		44,584
Other assets		2,064
Total assets acquired		103,714
Accounts payable		3,057
Other liabilities		2,380
Deferred tax liabilities		3,481
Total liabilities assumed		8,918
Total assets acquired and liabilities assumed		94,796
Less: cash acquired		1,140
Total purchase price, net of cash acquired	$	93,656

The fair value of JADAK intangible assets is comprised of the following (in thousands):

			Weighted Average
	Estimated Fair		Amortization
	Value		Period
Customer relationships	$	23,570	20 years
Developed technology		10,910	10 years
Trademarks and trade names		2,130	10 years
Backlog		1,810	1 year
Non-compete covenant		1,830	5 years
Total	$	40,250

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

The purchase price allocation resulted in $44.6 million of goodwill and $40.3 million of identifiable intangible assets, $61.8 million of which is expected to be deductible for tax purposes. Intangible assets are being amortized over their weighted average useful lives primarily based upon the pattern in which economic benefits related to such assets are expected to be realized. The amount of goodwill recorded represents the anticipated incremental value of future cash flow potential attributable to: (i) JADAK’s ability to develop and market new products and technologies; (ii) JADAK’s ability to develop relationships with new customers; and (iii) expected sales synergies from cross-selling current and future product offerings of both JADAK and the Company to OEM customers.

The following unaudited pro forma information presents the combined financial results for the Company and JADAK as if the acquisition of JADAK had been completed as of January 1, 2013 (in thousands, except per share information):

	Year Ended December 31,
	2014			2013
Revenue	$	375,737		$	370,462
Income (loss) from continuing operations	$	(16,067	)	$	11,900
Earnings per share from continuing operations - Basic	$	(0.47	)	$	0.35
Earnings per share from continuing operations - Diluted	$	(0.47	)	$	0.35

The pro forma information for all periods includes the effects of acquisition accounting, including amortization charges from acquired intangible assets, interest expense on borrowings in connection with the acquisition, and the related tax effects as though the acquisition of JADAK had been consummated as of the beginning of 2013. These pro forma results exclude the impact of transaction costs included in the historical results and the related tax effects. The pro forma financial information is presented for comparative purposes only and is not necessarily indicative of the results of operations that actually would have been achieved if the acquisition had taken place at the beginning of 2013.

NDS

On January 15, 2013, the Company acquired 100% of the outstanding membership interests of NDS Surgical Imaging, LLC and 100% of the outstanding stock of NDS Surgical Imaging KK (collectively, “NDS”) for $80.8 million in cash consideration, net of working capital adjustments. After the payment of closing working capital, a total of $5.4 million was held in escrow as indemnification for certain representations and warranty claims against the seller until the expiration of the escrow arrangement. In September 2014, the Company received the full remaining amount of $5.4 million held in escrow following the Company’s claims for breach of certain terms of the January 15, 2013 Securities Purchase Agreement for the acquisition of NDS. The escrow recovery was accounted for as a reduction to goodwill as the $5.4 million payment was clearly and directly related to the acquisition price. The escrow recovery resulted in a final adjusted NDS purchase price of $75.4 million.

The allocation of the purchase price is based upon a valuation of assets and liabilities acquired. Assets acquired and liabilities assumed have been recorded at their estimated fair values as of the acquisition date. The fair values of intangible assets were based on valuations using an income approach, with estimates and assumptions provided by management of NDS and the Company. The excess of the purchase price over the tangible assets, identifiable intangible assets and assumed liabilities was recorded as goodwill.

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

The total final purchase price allocation for the NDS acquisition was as follows (in thousands):

	Amount
Accounts receivable	$	10,327
Inventory		14,144
Property and equipment		2,426
Intangible assets		37,817
Goodwill		21,160
Other assets		1,782
Total assets acquired		87,656
Accounts payable		4,768
Other liabilities		7,149
Deferred tax liabilities		384
Total liabilities assumed		12,301
Total purchase price	$	75,355

The fair value of NDS intangible assets is comprised of the following (in thousands):

			Weighted Average
	Estimated Fair		Amortization
	Value		Period
Customer relationships	$	22,294	20 years
Developed technology		6,689	10 years
Trademarks and trade names		7,565	20 years
Backlog		1,269	1 year
Total	$	37,817

NDS contributed revenues of $68.4 million and loss from continuing operations before income taxes of $3.4 million for the year ended December 31, 2013.

Acquisition Costs

The Company recognized acquisition costs of $0.9 million, $0.7 million and $1.5 million in the years ended December 31, 2015, 2014 and 2013, respectively, primarily related to the acquisitions of Skyetek, Lincoln Laser, Applimotion, JADAK and NDS. These amounts were included in restructuring, acquisition and divestiture related costs in the consolidated statements of operations.

4. Discontinued Operations and Divestitures

Divestitures

In April 2015, the Company completed the sale of certain assets and liabilities of the JK Lasers business, previously included in the Laser Products reportable segment, for approximately $29.6 million in cash, net of final working capital adjustments and transactions costs. The Company recognized a pre-tax gain on sale of $19.6 million in the consolidated statement of operations. The JK Lasers business divestiture does not qualify for discontinued operations accounting treatment.

Discontinued Operations

In June 2015, the Company finalized an agreement to divest its 50% owned joint venture, the India JV, and recorded a pre-tax loss of less than $0.1 million in operating loss from discontinued operations, net of tax in the consolidated statement of operations during the year ended December 31, 2015. The India JV was reported as discontinued operations in the Company’s consolidated financial statements because it was part of the Scientific Lasers business that the Company divested in July 2014. All assets, liabilities,

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

accumulated other comprehensive income and non-controlling interest of the India JV were derecognized as of the date of the agreement.

In July 2014, the Company completed the sale of certain assets and liabilities of the Scientific Lasers business, operating under the Continuum and Quantronix brand names, for approximately $6.5 million, net of working capital adjustments, and recognized a $1.7 million loss, net of tax, in the consolidated statement of operations during the year ended December 31, 2014. The Company began accounting for the Scientific Lasers business, which was previously included in the Laser Products reportable segment, as discontinued operations in the first quarter of 2014. In accordance with the purchase and sales agreement, $1.5 million of the sales proceeds was held in escrow until January 2016. The Company recorded the $1.5 million escrow in other current assets on the consolidated balance sheet. In January 2016, the $1.5 million escrow was released to the Company in full.

In May 2013, the Company consummated the sale of certain assets and liabilities of the Semiconductor Systems business, sold under the GSI brand name, to Electro Scientific Industries, Inc. (“ESI”) for $9.7 million in cash, including working capital adjustments of $1.7 million received in September 2013. The Company recognized a $0.4 million loss on the sale, net of tax, in the consolidated statements of operations during the year ended December 31, 2013.

In October 2012, the Company sold certain assets and liabilities of the Laser Systems business, operating under the Control Laser and Baublys brand names, for $7.0 million to Hans Laser, subject to working capital adjustments, and recorded a $2.3 million gain, net of tax, in the consolidated statement of operations during the year ended December 31, 2012. In September 2013, the Company paid $0.4 million to Hans Laser as the final net working capital adjustment which resulted in an additional loss of $0.2 million, net of tax.

Assets and liabilities of discontinued operations as of December 31, 2014 included the balances of the India JV. There were no assets and liabilities of discontinued operations as of December 31, 2015. The major components of the assets and liabilities of discontinued operations as of December 31, 2014, respectively, were as follows (in thousands):

	2014
Accounts receivable, net	$	95
Inventories		161
Other assets		375
Assets of discontinued operations	$	631
Accounts payable	$	16
Accrued expenses and other current liabilities		74
Other liabilities		234
Liabilities of discontinued operations	$	324

The following table presents the operating results which are reported as discontinued operations in the Company’s consolidated statements of operations (in thousands):

	Year Ended December 31,
	2015			2014			2013
Revenue from discontinued operations	$	—		$	10,514		$	33,792
Loss from discontinued operations, before income tax	$	(13	)	$	(8,059	)	$	(3,361	)
Loss from discontinued operations, net of tax	$	(13	)	$	(5,607	)	$	(2,054	)
Loss on disposal of discontinued operations, net of tax	$	—		$	(1,726	)	$	(592	)

The loss from discontinued operations for the year ended December 31, 2014 included a $3.0 million fair value write-down of the Scientific Lasers business to its fair value less costs to sell and a $0.5 million fair value write-down of the India JV.

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AS OF DECEMBER 31, 2015

5. Accumulated Other Comprehensive Income (Loss)

Comprehensive income (loss) is defined as net income or loss and other changes in stockholders’ equity that do not represent transactions with stockholders or in the Company’s stock. Changes in accumulated other comprehensive income (loss) is as follows (in thousands):

	Total accumulated
	other			Cumulative
	comprehensive			translation				Pension
	income (loss)			adjustment				liability
Balance at December 31, 2012		(9,749	)			1,299				(11,048	)
Other comprehensive income		2,686				54				2,632
Amounts reclassified from other comprehensive income (loss) (1)		721				—				721
Balance at December 31, 2013	$	(6,342	)		$	1,353			$	(7,695	)
Other comprehensive loss		(10,488	)			(6,968	)			(3,520	)
Amounts reclassified from other comprehensive income (loss) (1)		374				—				374
Balance at December 31, 2014	$	(16,456	)		$	(5,615	)		$	(10,841	)
Other comprehensive income (loss)		(3,249	)			(4,083	)			834
Amounts reclassified from other comprehensive income (loss) (1)		875				—				875
Balance at December 31, 2015	$	(18,830	)		$	(9,698	)		$	(9,132	)

(1) The amounts reclassified from other comprehensive income (loss) were included in selling, general and administrative expenses in the consolidated statements of operations.

6. Goodwill, Intangible Assets and Impairment Charges

Goodwill

The following table summarizes changes in goodwill during the year ended December 31, 2015 (in thousands):

	December 31, 2015
Balance at beginning of year	$	90,746
Goodwill acquired from the Applimotion acquisition		7,672
Goodwill acquired from the Lincoln Laser acquisition		3,367
Goodwill acquired from the Skyetek acquisition		1,671
Balance at end of year	$	103,456

Goodwill acquired from the Applimotion, Lincoln Laser and Skyetek acquisitions is reflected in the Precision Motion, Laser Products and Vision Technologies segments, respectively. Goodwill by reportable segment as of December 31, 2015 is as follows (in thousands):

	Reportable Segment
	Laser Products			Vision Technologies			Precision Motion			Total
Goodwill	$	136,321		$	84,401		$	33,963		$	254,685
Accumulated impairment of goodwill		(102,461	)		(31,722	)		(17,046	)		(151,229	)
Total	$	33,860		$	52,679		$	16,917		$	103,456

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Goodwill by reportable segment as of December 31, 2014 is as follows (in thousands):

	Reportable Segment
	Laser Products			Vision Technologies			Precision Motion			Total
Goodwill	$	132,954		$	82,730		$	26,291		$	241,975
Accumulated impairment of goodwill		(102,461	)		(31,722	)		(17,046	)		(151,229	)
Total	$	30,493		$	51,008		$	9,245		$	90,746

Intangible Assets

Intangible assets as of December 31, 2015 and 2014, respectively, are summarized as follows (in thousands):

	December 31, 2015
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Remaining Life (Years)
Amortizable intangible assets:
Patents and acquired technologies	$	82,821	$	(66,297	)	$	16,524		7.7
Customer relationships		67,168		(36,914	)		30,254		13.6
Customer backlog		2,644		(2,589	)		55		1.0
Non-compete covenant		2,514		(882	)		1,632		3.2
Trademarks and trade names		10,711		(5,934	)		4,777		9.1
Amortizable intangible assets		165,858		(112,616	)		53,242		11.0
Non-amortizable intangible assets:
Trade names		13,027		—			13,027
Total	$	178,885	$	(112,616	)	$	66,269

	December 31, 2014
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Remaining Life (Years)
Amortizable intangible assets:
Patents and acquired technologies	$	78,253	$	(62,010	)	$	16,243		7.5
Customer relationships		63,029		(31,531	)		31,498		14.7
Customer backlog		1,810		(1,641	)		169		0.2
Non-compete covenant		1,830		(366	)		1,464		4.2
Trademarks and trade names		10,205		(5,364	)		4,841		9.8
Amortizable intangible assets		155,127		(100,912	)		54,215		11.8
Non-amortizable intangible assets:
Trade names		13,027		—			13,027
Total	$	168,154	$	(100,912	)	$	67,242

All definite-lived intangible assets are amortized either on a straight-line basis or an economic benefit basis over their remaining useful life. Amortization expense for customer relationships and definite-lived trademarks, trade names and other intangibles is included in operating expenses in the accompanying consolidated statements of operations. Amortization expense for patents and acquired technologies is included in cost of revenue in the accompanying consolidated statements of operations. Amortization expense is as follows (in thousands):

	Year Ended December 31,
	2015		2014		2013
Amortization expense – cost of revenue	$	4,712	$	6,143	$	5,280
Amortization expense – operating expenses		7,611		10,262		7,270
Total amortization expense	$	12,323	$	16,405	$	12,550

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Estimated future amortization expense for each of the five succeeding years and thereafter is as follows (in thousands):

Year Ending December 31,	Cost of Revenue		Operating Expenses		Total
2016	$	3,963	$	7,498	$	11,461
2017		3,600		6,898		10,498
2018		2,080		6,306		8,386
2019		1,768		4,324		6,092
2020		1,501		2,418		3,919
Thereafter		3,612		9,274		12,886
Total	$	16,524	$	36,718	$	53,242

Impairment Charges

The most recent annual goodwill and indefinite-lived intangible asset impairment test was performed as of the beginning of the second quarter of 2015, noting no impairment. With the exception of our NDS reporting unit, implied fair values of all reporting units exceeded their carrying values by at least 20%.

During the fourth quarter of 2014, the Company completed its annual operating plan for the NDS business following the MEDICA and RSNA tradeshows, two main tradeshows for the NDS business. Expectations for sales and operating profit were lowered significantly versus prior forecasts. The lower expectations for sales and operating profit were driven by a strategic decision to discontinue certain NDS products, lack of seasonal uptick during the fourth quarter of 2014 attributable to slower than expected hospital capital expenditures, and lower than expected customer orders from the fourth quarter tradeshows.

In considering the above mentioned factors, the Company determined that a triggering event occurred in the fourth quarter of 2014 and that an interim impairment review of the goodwill and intangible assets related to the NDS reporting unit was necessary.  First, the Company performed a long-lived asset recoverability test in accordance with ASC 360-10-35-15, “Impairment or Disposal of Long-Lived Assets,” on the lowest level of identifiable cash flows, which was determined to be the NDS business.  The recoverability test compared the carrying value of the NDS business to the undiscounted cash flows. As a result of this recoverability test, the Company determined that the assets were not recoverable.  The Company then determined the fair value of the NDS business using a discounted cash flow methodology, which resulted in a $21.8 million intangible assets impairment charge in the fourth quarter of 2014. The impairment charge is reflected in the operating results of the Vision Technologies segment.  

Subsequent to impairing the NDS business’s long-lived assets, step one of the goodwill impairment analysis was performed.  As the carrying value of the NDS reporting unit exceeded its implied fair value, the Company performed the second step of the goodwill impairment test, comparing the implied fair value of the reporting unit’s goodwill with its carrying amount to measure the impairment loss. The implied fair value of goodwill is determined in the same manner as the amount of goodwill recognized in a business combination, whereby the estimated fair value of the reporting unit is allocated to all of the assets and liabilities of that reporting unit as if the reporting unit had been acquired in a business combination and the fair value of the reporting unit was the purchase price paid. If the carrying amount of the reporting unit’s goodwill exceeds its implied fair value, an impairment loss is recognized in an amount equal to that excess. After completing the second step of the goodwill impairment test, the Company recorded a $19.6 million goodwill impairment charge in the fourth quarter of 2014. The impairment charge is reflected in the operating results of the Vision Technologies segment.    

The results of the impairment review as of December 31, 2014 are summarized in the following table (in thousands):

	Pre-Impairment Net Carrying Value		Impairment Charge			Post-Impairment Net Carrying Value
Goodwill	$	110,321	$	(19,575	)	$	90,746
Intangible assets		89,109		(21,867	)		67,242
Total	$	199,430	$	(41,442	)	$	157,988

The Company did not have any goodwill or indefinite-lived intangible asset impairment charges during the year ended December 31, 2013.

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AS OF DECEMBER 31, 2015

7. Fair Value Measurements

ASC 820, “Fair Value Measurement,” establishes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the third is considered unobservable:

Level 1: Quoted prices for identical assets or liabilities in active markets which the Company can access.

Level 2: Observable inputs other than those described in Level 1.

Level 3: Unobservable inputs.

Cash equivalents

The Company’s cash equivalents are investments in money market accounts, which represent the only asset the Company measures at fair value on a recurring basis. The Company determines the fair value of our cash equivalents using a market approach based on quoted prices in active markets. The fair values of cash, accounts receivable, income taxes receivable, accounts payable, income taxes payable and accrued expenses and other current liabilities approximate their carrying values because of their short-term nature.

Contingent consideration

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GSI GROUP INC.

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AS OF DECEMBER 31, 2015

Under the purchase and sale agreement for the Skyetek acquisition, the owners of Skyetek are eligible to receive contingent consideration based on the achievement of certain sales order commitment targets from October 2015 through June 2017. If such targets are achieved, the contingent consideration will be payable in 2017. The Company recognized an estimated fair value of $0.2 million as part of the purchase price as of the acquisition date. Subsequent changes in the estimated fair value of this contingent liability will be recorded in the consolidated statement of operations as acquisition related costs until the liability is fully settled. There have been no changes to the fair value of the contingent consideration since the acquisition date. The estimated fair value of the contingent consideration is reported as a long-term liability in the consolidated balance sheet.

Under the purchase and sale agreement for the Lincoln Laser acquisition, the shareholders of Lincoln Laser are eligible to receive contingent consideration based on the achievement of certain revenue targets for fiscal year 2016. If such targets are achieved, the contingent consideration will be payable in cash in one installment in 2017. The estimated fair value of the contingent consideration was determined based on the Monte Carlo valuation method and has been recorded as part of the purchase price as of the acquisition date. Subsequent changes in the estimated fair value of this contingent liability will be recorded in the consolidated statement of operations as acquisition related costs until the liability is fully settled. There have been no changes to the fair value of the contingent consideration since the acquisition date. The estimated fair value of the contingent consideration is reported as a long-term liability in the consolidated balance sheet.

The Company acquired Applimotion on February 19, 2015. The former shareholders of Applimotion are eligible to receive contingent consideration based on the achievement of certain revenue targets for fiscal years 2015 to 2017. If such targets are achieved, the contingent consideration will be payable in cash in two installments in 2017 and 2018, respectively. The estimated fair value of the contingent consideration was determined based on the Monte Carlo valuation method and has been recorded as part of the purchase price as of the acquisition date. Subsequent changes in the estimated fair value of this contingent liability will be recorded in the consolidated statement of operations until the liability is fully settled. In December 2015, a $0.4 million increase in the estimated fair value of this contingent liability was recorded in the consolidated statement of operations in restructuring, acquisition and divestiture related costs. The estimated fair value of the contingent consideration is reported as a long-term liability in the consolidated balance sheet.

The following table summarizes the fair values of our assets and liabilities measured at fair value on a recurring basis as of December 31, 2015 (in thousands):

			Quoted Prices in				Significant Other
			Active Markets for		Significant Other		Unobservable
			Identical Assets		Observable Inputs		Inputs
	Fair Value		(Level 1)		(Level 2)		(Level 3)
Assets
Cash equivalents	$	4,657	$	4,657	$	—	$	—
Liabilities
Contingent consideration	$	3,889	$	—	$	—	$	3,889

The following table summarizes the fair values of our financial assets as of December 31, 2014 (in thousands):

			Quoted Prices in				Significant Other
			Active Markets for		Significant Other		Unobservable
			Identical Assets		Observable Inputs		Inputs
	Fair Value		(Level 1)		(Level 2)		(Level 3)
Assets
Cash equivalents	$	2,255	$	2,255	$	—	$	—

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Changes in the fair value of our Level 3 contingent consideration for the year ended December 31, 2015 were as follows (in thousands):

	Contingent Consideration
Balance at December 31, 2014	$	—
Acquisition of Applimotion		965
Fair value adjustment		430
Acquisition of Lincoln Laser		2,344
Acquisition of Skyetek		150
Balance at December 31, 2015	$	3,889

There were no Level 3 assets or liabilities during the year ended December 31, 2014.

The following table provides quantitative information associated with the fair value measurement of the Company’s Level 3 liabilities:

Liability	December 31, 2015 Fair Value (in thousands)	Valuation Technique	Unobservable Inputs	Percentage Applied
Contingent consideration (Applimotion)	$1,395	Monte Carlo method	Historical and projected revenues for fiscal years 2015 to 2017 Revenue volatility Cost of debt WACC	N/A 87.3% 2.82% 11.1%
Contingent consideration (Lincoln Laser)	$2,344	Monte Carlo method	Projected revenues for fiscal year 2016 Revenue volatility Cost of debt WACC	N/A 37.1% 4.7% 9.8%

Increases or decreases in the unobservable inputs noted above would result in a higher or lower fair value measurement.

Except for the assets and liabilities acquired from the Applimotion, Lincoln Laser and Skyetek acquisitions, as disclosed in Note 3, there were no assets and liabilities that were measured at fair value on a non-recurring basis during 2015. See Note 10 for discussion of the estimated fair value of the Company’s outstanding debt and Note 12 for discussion of the estimated fair value of the Company’s pension plan assets.

8. Earnings (Loss) per Common Share

Basic earnings (loss) per common share is computed by dividing net income (loss) by the weighted average number of common shares outstanding during the year. For diluted earnings (loss) per common share, the denominator also includes the dilutive effect of outstanding restricted stock units determined using the treasury stock method. Dilutive effects of contingently issuable shares are included in the weighted average dilutive share calculation when the contingencies have been resolved. For years in which net losses are generated, the dilutive potential common shares are excluded from the calculation of diluted earnings per share as the effect would be anti-dilutive.

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

The following table sets forth the computation of basic and diluted earnings (loss) per share (in thousands, except per share amounts):

	Year Ended December 31,
	2015			2014			2013
Numerators:
Income (loss) from continuing operations	$	35,628		$	(16,909	)	$	9,977
Consolidated loss from discontinued operations		(13	)		(7,333	)		(2,646	)
Less: income attributable to noncontrolling interest		—			(10	)		(22	)
Loss from discontinued operations attributable to GSI Group Inc.		(13	)		(7,343	)		(2,668	)
Net income (loss) attributable to GSI Group Inc.	$	35,615		$	(24,252	)	$	7,309
Denominators:
Weighted average common shares outstanding— basic		34,579			34,352			34,073
Dilutive potential common shares (1)		248			—			323
Weighted average common shares outstanding— diluted		34,827			34,352			34,396
Antidilutive common shares excluded from above		—			439			246
Basic Earnings (Loss) per Common Share:
From continuing operations	$	1.03		$	(0.49	)	$	0.29
From discontinued operations	$	(0.00	)	$	(0.21	)	$	(0.08	)
Basic earnings (loss) per share attributable to GSI Group Inc.	$	1.03		$	(0.70	)	$	0.21
Diluted Earnings (Loss) per Common Share:
From continuing operations	$	1.02		$	(0.49	)	$	0.29
From discontinued operations	$	(0.00	)	$	(0.21	)	$	(0.08	)
Diluted earnings (loss) per share attributable to GSI Group Inc.	$	1.02		$	(0.70	)	$	0.21

(1) Due to the Company’s net loss position for the year ended December 31, 2014, all potentially dilutive shares were excluded as their effect would have been anti-dilutive.

Common Stock Repurchases

In October 2013, the Company’s Board of Directors authorized a share repurchase plan under which the Company may repurchase outstanding shares of the Company’s common stock up to an aggregate amount of $10.0 million. The shares may be repurchased from time to time, at the Company’s discretion, based on ongoing assessment of the capital needs of the business, the market price of the Company’s common stock, and general market conditions. Shares may also be repurchased through an accelerated stock purchase agreement, on the open market or in privately negotiated transactions in accordance with applicable federal securities laws. Repurchases may be made under certain SEC regulations, which would permit common stock to be purchased when the Company would otherwise be prohibited from doing so under insider trading laws. The share repurchase plan does not obligate the Company to acquire any particular amount of common stock. No time limit was set for the completion of the share repurchase program, and the program may be suspended or discontinued at any time. The Company expects to fund the share repurchase through cash on hand and future cash flow from operations. During 2015, the Company repurchased 122 thousand shares in the open market for an aggregate purchase price of $1.6 million at an average price of $13.29 per share. As of December 31, 2015, the Company had repurchased an aggregate of 172 thousand shares for an aggregate purchase price of $2.2 million at an average price of $12.48 per share.

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

9. Supplementary Balance Sheet Information

The following tables provide the details of selected balance sheet items as of the dates indicated (in thousands):

Inventories

	December 31,
	2015		2014
Raw materials	$	38,511	$	38,934
Work-in-process		10,138		9,899
Finished goods		9,266		11,945
Demo and consigned inventory		1,651		2,165
Total inventories	$	59,566	$	62,943

Property, Plant and Equipment, net

	December 31,
	2015			2014
Cost:
Land, buildings and improvements	$	48,154		$	46,222
Machinery and equipment		43,376			50,487
Total cost		91,530			96,709
Accumulated depreciation		(50,980	)		(56,621	)
Property, plant and equipment, net	$	40,550		$	40,088

As of December 31, 2015 and 2014, the Company has gross assets under capital lease of $13.2 and $12.7 million, respectively. The assets acquired under capital leases are included in land, buildings and improvements and machinery and equipment and the related amortization expense is included in depreciation expense. The Company also capitalized software development costs of $1.9 million, $0.2 million and $0.2 million in 2015, 2014 and 2013, respectively, in accordance with the guidance in ASC 350-40, “Internal-Use Software.” The following table summarizes depreciation expense on property, plant and equipment, including demo units and assets under capital leases (in thousands):

	Year Ended December 31,
	2015		2014		2013
Depreciation expense	$	7,873	$	8,016	$	7,400

The following table summarizes total accumulated depreciation on assets under capital leases as of the dates indicated (in thousands):

	December 31,
	2015		2014
Accumulated depreciation on assets under capital leases	$	3,798	$	2,741

Accrued Expenses and Other Current Liabilities

The following table summarizes accrued expenses and other current liabilities as of the dates indicated (in thousands):

	December 31,
	2015		2014
Accrued compensation and benefits	$	7,357	$	7,741
Accrued warranty		3,335		3,044
Accrued restructuring		1,652		109
Accrued professional services fees and other		8,838		8,507
Total	$	21,182	$	19,401

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Accrued Warranty

The following table summarizes accrued warranty activities for the periods indicated (in thousands):

	Year Ended December 31,
	2015			2014
Balance at beginning of year	$	3,044		$	3,315
Provision charged to cost of revenue		2,025			1,684
Acquisition related warranty accrual		132			90
Use of provision		(1,454	)		(2,003	)
Divestiture of JK Lasers		(389	)		—
Foreign currency exchange rate changes		(23	)		(42	)
Balance at end of year	$	3,335		$	3,044

Other Long Term Liabilities

The following table summarizes other long term liabilities as of the dates indicated (in thousands):

	December 31,
	2015		2014
Capital lease obligations	$	9,173	$	9,507
Accrued pension liabilities		3,693		6,037
Accrued contingent considerations		3,889		—
Other		2,690		3,275
Total		19,445		18,819

10. Debt

Debt consisted of the following (in thousands):

	December 31,
	2015			2014
Senior Credit Facilities – term loan	$	7,500		$	7,500
Less: unamortized debt issuance costs		(115	)		(155	)
Total current portion of long-term debt	$	7,385		$	7,345
Senior Credit Facilities – term loan	$	20,000		$	27,500
Senior Credit Facilities – revolving credit facility		70,000			80,000
Less: unamortized debt issuance costs		(1,574	)		(2,470	)
Total long-term debt	$	88,426		$	105,030
Total Senior Credit Facilities	$	95,811		$	112,375

Senior Credit Facilities

On December 27, 2012, the Company entered into an amended and restated senior secured credit agreement (the “Amended and Restated Credit Agreement”) with new and existing lenders for an aggregate credit facility of $125.0 million, consisting of a $50.0 million, 5-year, term loan facility and a $75.0 million, 5-year, revolving credit facility (collectively, the “Senior Credit Facilities”). The Senior Credit Facilities mature in December 2017.

The borrowings outstanding under the credit facility bear interest at rates based on (a) the Eurodollar Rate, as defined in the Amended and Restated Credit Agreement, plus a rate ranging from 2.00% to 3.00% per annum or (b) the Base Rate, as defined in the Amended and Restated Credit Agreement, plus a rate ranging from 1.00% to 2.00% per annum, in each case based upon the Company’s consolidated leverage ratio. The Company is also required to pay a commitment fee on unused commitments under the

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AS OF DECEMBER 31, 2015

revolving credit facility ranging between 0.250% and 0.625% per annum, which is based upon the Company’s consolidated leverage ratio.

The Amended and Restated Credit Agreement contains various customary representations, warranties and covenants applicable to the Company and its subsidiaries, including: (i) covenants regarding maximum consolidated leverage ratio and minimum consolidated fixed charge coverage ratio; (ii) limitations on restricted payments, including dividend payments and stock repurchases, provided that the Company may repurchase its outstanding common shares so long as, immediately after giving effect to the share repurchase, the Company’s consolidated leverage ratio is no more than 2.25:1.00, and the Company has unrestricted cash plus amounts available for borrowing under the Senior Credit Facilities of at least $25.0 million immediately after giving effect on the share repurchase; (iii) limitations on fundamental changes involving the Company; (iv) limitations on the disposition of assets; and (v) limitations on indebtedness, investments, and liens.

The Company’s obligations under the Senior Credit Facilities are secured on a senior basis by a lien on substantially all of the assets of the Company and its material United States (“U.S.”) and United Kingdom (“U.K.”) subsidiaries and guaranteed by the Company and its material U.S. and U.K. subsidiaries. The Amended and Restated Credit Agreement also contains customary events of default.

The Company entered into three amendments to the Amended and Restated Credit Agreement during 2013 and one amendment during 2014. The first and second amendments resulted in immaterial modifications. On September 13, 2013, the Company entered into a third amendment (the “Third Amendment”) which increased the accordion feature provided in the Amended and Restated Agreement from uncommitted $50.0 million to uncommitted $100.0 million in aggregate of the revolving credit facility and term loan. On February 10, 2014, the Company entered into a fourth amendment (the “Fourth Amendment”), which increased the revolving credit facility commitment under the Amended and Restated Credit Agreement by $100 million from $75 million to $175 million and reset the accordion feature to $100 million for future expansion. Additionally, the Fourth Amendment increased the maximum permitted consolidated leverage ratio from 2.75 to 3.00, and increased the maximum consolidated leverage ratio for permitted acquisitions and stock repurchases from 2.25 to 2.50. The Company was in compliance with these debt covenants as of December 31, 2015.

On January 22, 2016, the Company entered into a fifth amendment to the Amended and Restated Credit Agreement (the “Fifth Amendment”). The Fifth Amendment resulted in immaterial modifications.

The principal on the Company’s outstanding term loan matures as follows (in thousands):

	Term Loan
2016	$	7,500
2017		20,000
Total debt repayments	$	27,500

The Company may voluntarily prepay loans or reduce commitments under the Senior Credit Facilities, in whole or in part, without premium or penalty, subject to certain minimum principal amounts.

The Company may be required to prepay outstanding loans under the Amended and Restated Credit Agreement with the net proceeds of certain asset dispositions and incurrences of certain debt. At the election of the Company, and so long as no default shall have occurred, the Company may reinvest within a year all or any portion of the net proceeds from such asset dispositions or incurrences of debt.

As of December 31, 2015, the Company had $105.0 million available to be drawn under the revolving credit facility. Excluding commitment fees, the interest rate for the credit facility was approximately 2.9% as of December 31, 2015. The commitment fee rate for the unused commitments under the revolving credit facility was approximately 0.4% as of December 31, 2015.

Guarantees

Each Guarantor, as defined in the Amended and Restated Credit Agreement, jointly and severally, unconditionally guarantees the due and punctual payment of the principal, interest and fees under the Senior Credit Facilities, when due and payable, whether at maturity, by required prepayment, by acceleration or otherwise. In addition, Guarantors guarantee the due and punctual payment, fees

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AS OF DECEMBER 31, 2015

and interest on the overdue principal of the Senior Credit Facilities and the due and punctual performance of all obligations of the Company in accordance with the terms of the Amended and Restated Credit Agreement. Furthermore, each Guarantor, jointly and severally, unconditionally guarantees that in the event of any extension, renewal, amendment, refinancing or modification of any of the Senior Credit Facilities or any of such other Obligations, as defined in the Amended and Restated Credit Agreement, amounts due will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, at stated maturity, by acceleration or otherwise.

The obligations of each Guarantor are limited to the maximum amount, after giving effect to all other contingent and fixed liabilities or any collections from or payments made by or on behalf of any other Guarantor. Each Guarantor that makes a payment or distribution under a Guarantee is entitled to a contribution from each other Guarantor of its Pro Rata Share, as defined in the Amended and Restated Credit Agreement, based on the adjusted net assets of each Guarantor. The Guarantees will continue to be effective or be reinstated, as the case may be, if at any time any payment of any of the obligations of the Guarantors is rescinded or must otherwise be returned upon the insolvency, bankruptcy or reorganization of the Company, a Guarantor or otherwise, all as though such payment had not been made.

Each Guarantor may be released from its obligations under its respective Guarantee and its obligations under the Amended and Restated Credit Agreement upon the occurrence of certain events, including, but not limited to: (i) the Guarantor ceases to be a subsidiary; and (ii) payment in full of the principal, accrued and unpaid interest on the Senior Credit Facilities and all other obligations.

As of December 31, 2015, the maximum potential amount of future payments the Guarantors could be required to make under the Guarantee is the principal amount of the Senior Credit Facilities plus all accrued unpaid interest thereon. However, as of December 31, 2015, the Guarantors are not expected to be required to perform under the Guarantee.

Mortgages

In connection with the Amended and Restated Credit Agreement and as required thereby, GSI Group Corporation and Excel Technology, Inc. (“Excel”), each a subsidiary of the Company, continues to be subject to an Open-End Deed of Trust, Assignment of Leases and Rents, Security Agreement and Fixture Filing, dated as of October 19, 2011, in favor of or for the benefit of the Trustee, wherein GSI Group Corporation and Excel mortgaged, granted, bargained, assigned, sold and conveyed their respective interest in the property located in Mukilteo, Washington, Chatsworth, California, Orlando, Florida and Phoenix, Arizona, respectively, to secure (a) the payment of all of the obligations of the Borrower and the Guarantors under the Amended and Restated Credit Agreement, the respective mortgages and the other Security Documents (as defined in the respective mortgage), and (b) the performance of all terms, covenants, conditions, provisions, agreements and liabilities contained in the credit agreement.

Fair Value of Debt

As of December 31, 2015 and 2014, the outstanding balance of the Company’s debt approximated fair value based on current rates available to the Company for debt of the same maturities.

11. Share-Based Compensation

Capital Stock

The authorized capital of the Company consists of an unlimited number of common shares without nominal or par value. Holders of common shares are entitled to one vote per share. Holders of common shares are entitled to receive dividends, if and when declared by the Board of Directors, and to share ratably in its assets legally available for distribution to the stockholders in the event of liquidation. Holders of common shares have no redemption or conversion rights.

2010 Incentive Award Plan

In November 2010, the Company’s stockholders approved the 2010 Incentive Award Plan (the “2010 Incentive Plan”), under which the Company may grant share-based compensation awards to employees, consultants and directors. In May 2014, the Company’s stockholders approved the amended and restated 2010 Incentive Award Plan (the “Amended and Restated 2010 Incentive Plan”). The maximum number of shares which can be issued pursuant to the Amended and Restated 2010 Incentive Plan is 4,398,613, subject to adjustment as set forth in the Amended and Restated 2010 Incentive Plan. The Amended and Restated 2010 Incentive Plan provides for the grant of incentive stock options, non-qualified stock options, restricted stock, restricted stock units, stock appreciation

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AS OF DECEMBER 31, 2015

rights, deferred stock, deferred stock units, dividends equivalents, performance awards and stock payments (collectively referred to as “Awards”). The Amended and Restated 2010 Incentive Plan allows the Company to continue to grant awards intended to constitute “performance-based compensation” for purposes of Section 162(m) of the Internal Revenue Code of 1986, as amended, and includes certain provisions that reflect good corporate governance practices. The Amended and Restated 2010 Incentive Plan provides for specific limits on the number of shares with respect to Awards that may be granted to any person during any calendar year and the amount of cash that can be paid with respect to Awards to any one person during any calendar year. The Amended and Restated 2010 Incentive Plan will expire and no further Awards may be granted after April 9, 2024.As of December 31, 2015, there were1,986,154 shares available for future awards under the Amended and Restated 2010 Incentive Plan.

Restricted stock units represent the right to receive common shares or the fair market value of such shares in cash as determined by the administrator of the Amended and Restated 2010 Incentive Plan at a specified date in the future, subject to forfeiture of such right. The purchase price for restricted stock units, if any, will be determined by the administrator of the Amended and Restated 2010 Incentive Plan on an award-by-award basis. Deferred stock units entitle the recipient thereof to receive one share of common stock on the date such deferred stock unit becomes vested and other conditions are removed or expire, if applicable, or upon a specified settlement date thereafter. Deferred stock units are typically awarded without payment of consideration.

Shares subject to Awards that have expired, forfeited or settled in cash, or repurchased by the Company at the same price paid by the awardee may be added back to the number of shares available for grant under the Amended and Restated 2010 Incentive Plan and may be granted as new Awards. Shares that are used to pay the exercise price for an option, shares withheld to pay taxes, shares subject to a stock appreciation right that are not issued in connection with the stock settlement of the stock appreciation right on exercise thereof, and shares purchased on the open market with the cash proceeds from the exercise of options will not be added back to the number of shares available for grant under the Amended and Restated 2010 Incentive Plan. Shares issued to satisfy Awards under the Amended and Restated 2010 Incentive Plan may be previously authorized but unissued shares, treasury shares or shares repurchased on the open market.

The table below summarizes activities relating to restricted and deferred stock units issued and outstanding under the Amended and Restated 2010 Incentive Plan during the year ended December 31, 2015:

	Restricted and Deferred Stock Units (In thousands)			Weighted Average Grant Date Fair Value		Weighted Average Remaining Vesting Period (in years)	Aggregate Intrinsic Value (1) (In thousands)
Unvested at December 31, 2014		749		$	10.80
Granted		345		$	13.46
Vested		(428	)	$	10.73
Forfeited		(47	)	$	11.11
Unvested at December 31, 2015		619		$	12.32	0.88 years	$	8,429
Expected to vest as of December 31, 2015		605		$	12.31	0.88 years	$	8,243

(1) The aggregate intrinsic value is calculated based on the fair value of $13.62 per share of the Company’s common stock on December 31, 2015 due to the fact that the restricted stock units carry a $0 purchase price.

The total fair value of restricted stock units that vested in 2015, based on the market price of the underlying stock on the day of vesting, was $5.1 million.

Other Issuances

In March 2014, the Company granted restricted stock units in an aggregate of 180,000 shares as employment inducement awards related to an acquisition. These restricted stock units are performance-based awards and would vest after two years if certain financial targets and service conditions have been achieved. In 2015, these financial targets were no longer deemed probable and the cumulative expense recognized in the prior year was reversed. The share-based compensation expense and related adjustments for these awards are recorded in restructuring, acquisition and divestiture related costs in the consolidated statement of operations.

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AS OF DECEMBER 31, 2015

Share-Based Compensation Expense

The table below summarizes share-based compensation expense recorded in income from continuing operations (in thousands):

	Year Ended December 31,
	2015			2014		2013
Selling, general and administrative	$	3,960		$	3,967	$	5,144
Research and development and engineering		170			196		180
Cost of revenue		257			166		118
Restructuring, acquisition and divestiture related costs		(322	)		322		125
Total share-based compensation expense	$	4,065		$	4,651	$	5,567

The expense recorded during each of the years ended December 31, 2015, 2014 and 2013 included $0.5 million, related to deferred stock units granted to the members of the Company’s Board of Directors pursuant to the Company’s Amended and Restated 2010 Incentive Plan. The expense associated with the respective deferred stock units was recognized in full on the respective date of grant, as the deferred stock units were fully vested and nonforfeitable upon grant.

The Company’s restricted stock unit awards have generally been issued with a three-year vesting period and vest based solely on service conditions. Accordingly, the Company generally recognizes compensation expense on a straight-line basis over the requisite service period. The Company reduces the compensation expense by an estimated forfeiture rate which is based on anticipated forfeitures and actual experience.

As of December 31, 2015, the Company’s outstanding equity awards for which compensation expense will be recognized in the future consist of time-based restricted stock units granted under the Amended and Restated 2010 Incentive Plan. The Company expects to record aggregate share-based compensation expense of $4.9 million, net of estimated forfeitures, subsequent to December 31, 2015, over a weighted average period of 1.9 years, for all outstanding equity awards.

12. Employee Benefit Plans

Defined Benefit Plans

The Company maintains a defined benefit pension plan in the United Kingdom (the “U.K. Plan”). In 1997, membership to the U.K. Plan was closed. In 2003, the Company was allowed to stop accruing additional benefits to the participants. Benefits under the U.K. Plan were based on the employees’ years of service and compensation as of 2003. The Company continues to fund the plan in sufficient amounts to cover current benefit payments as well as to fund a portion of the unfunded pension obligations based on periodic agreements with the trustees of the U.K. Plan.

The net periodic pension cost included the following components (in thousands):

	Year Ended December 31,
	2015			2014			2013
Components of the net periodic pension cost:
Interest cost	$	1,340		$	1,589		$	1,403
Expected return on plan assets		(1,844	)		(1,958	)		(1,595	)
Amortization of actuarial losses		875			374			668
Net periodic pension cost	$	371		$	5		$	476

The actuarial assumptions used to compute the net periodic pension cost for the years ended December 31, 2015, 2014 and 2013, respectively, for the U.K. Plan were as follows:

	Year Ended December 31,
	2015			2014			2013
Weighted-average discount rate		3.5	%		4.6	%		4.3	%
Weighted-average long-term rate of return on plan assets		5.6	%		5.9	%		5.7	%

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

The actuarial assumptions used to compute the funded status of the U.K. Plan as of December 31, 2015 and 2014, respectively,  were as follows:

	December 31,
	2015			2014
Weighted-average discount rate		3.8	%		3.5	%
Rate of inflation		2.8	%		2.7	%

The discount rates used are derived from (AA) corporate bonds that have maturities approximating the terms of the related obligations. In estimating the expected return on plan assets, the Company considered the historical performance of the major asset classes held and current forecasts of future rates of return for these asset classes.

The following table provides a reconciliation of benefit obligations and plan assets of the U.K. Plan (in thousands):

	December 31,
	2015			2014
Change in benefit obligation:
Projected benefit obligation at beginning of year	$	39,421		$	35,193
Interest cost		1,340			1,589
Actuarial (gains) losses		(2,083	)		6,060
Benefits paid		(798	)		(1,006	)
Foreign currency exchange rate changes		(1,966	)		(2,415	)
Projected benefit obligation at end of year	$	35,914		$	39,421
Accumulated benefit obligation at end of year	$	35,914		$	39,421
Change in plan assets:
Fair value of plan assets at beginning of year	$	33,610		$	33,457
Actual return on plan assets		342			2,234
Employer contributions		955			1,000
Benefits paid		(798	)		(1,006	)
Foreign currency exchange rate changes		(1,735	)		(2,075	)
Fair value of plan assets at end of year	$	32,374		$	33,610
Funded status at end of year	$	(3,540	)	$	(5,811	)
Amounts included in accumulated other comprehensive loss not yet recognized in net periodic pension cost:
Net actuarial loss	$	(9,874	)	$	(11,890	)
Amounts expected to be amortized from accumulated other comprehensive loss into net periodic pension cost over the next fiscal year consists of:
Net actuarial loss	$	794		$	892

The funded status of the U.K. Plan is included in other long term liabilities in the accompanying consolidated balance sheets.

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

The following table reflects the total expected benefit payments to plan participants and have been estimated based on the same assumptions used to measure the Company’s benefit obligations as of December 31, 2015 (in thousands):

	Amount
2016	$	941
2017		1,043
2018		868
2019		1,244
2020		1,428
2021-2025		8,135
Total	$	13,659

In the U.K., funding valuations are conducted every three years in order to determine the future level of contributions. Based on the results of the most recent valuation completed in the fourth quarter 2015, the Company’s annual contributions will be approximately $1.0 million per year in 2016 and will increase by 2.9% per year thereafter.

Fair Value of Plan Assets

The Company’s overall objective is to invest plan assets in a portfolio of diversified assets, primarily through the use of institutional collective funds, to achieve long-term growth. The strategic asset allocation uses a combination of risk controlled and index strategies in fixed income and global equities. The target allocations are approximately 60% to funds investing in global equities, approximately 18% to funds investing in global bonds, approximately 9% to alternative assets (including private equity, real estate and hedge funds), and approximately 13% in cash.

The following table summarizes the fair values of Plan assets by asset category as of December 31, 2015 (in thousands):

Asset Category	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)
Mutual Funds:
Balanced (1)	$	15,611	$	—	$	15,611	$	—
Growth (2)		16,583		—		16,583		—
Cash		180		180		—		—
Total	$	32,374	$	180	$	32,194	$	—

(1) This class comprises a diversified portfolio of global investments which seeks a balanced return between capital growth and fixed income and is allocated on a weighted average basis as follows: equities (52%), bonds (24%), other assets (9%) and cash (15%).

(2) This class comprises a diversified portfolio of global investments which seeks long-term capital growth and is allocated on a weighted average basis as follows: equities (67%), bonds (12%), other assets (9%) and cash (12%).

The following table summarizes the fair values of Plan assets by asset category as of December 31, 2014 (in thousands):

Asset Category	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)
Mutual Funds:
Balanced (1)	$	16,287	$	—	$	16,287	$	—
Growth (2)		17,149		—		17,149		—
Cash		174		174		—		—
Total	$	33,610	$	174	$	33,436	$	—

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

(1) This class comprises a diversified portfolio of global investments which seeks a balanced return between capital growth and fixed income and is allocated on a weighted average basis as follows: equities (54%), bonds (32%), other assets (5%) and cash (9%).

(2) This class comprises a diversified portfolio of global investments which seeks long-term capital growth and is allocated on a weighted average basis as follows: equities (67%), other assets (15%), bonds (8%), and cash (10%).

The tables above present the fair value of plan assets in accordance with the fair value hierarchy. Certain pension plan assets are measured using net asset value per share (or its equivalent) and are reported as a level 2 investment above. These investments have quoted prices in inactive markets and there are significant other observable inputs which can be corroborated by observable market data for substantially the full term of the plan assets.

Defined Contribution Plans

The Company has defined contribution employee savings plans in the U.K., Japan, and the U.S. The Company matches the contributions of participating employees on the basis of percentages specified in each plan. Company matching contributions to the plans were $2.7 million, $2.6 million and $1.7 million for the years ended December 31, 2015, 2014 and 2013, respectively.

13. Income Taxes

Components of the Company’s income (loss) from continuing operations before income taxes are as follows (in thousands):

	Year Ended December 31,
	2015			2014			2013
Income (loss) from continuing operations before income taxes:
Canadian	$	(1,674	)	$	(20,212	)	$	(5,366	)
U.S.		23,298			(9,661	)		12,838
Other		24,398			11,958			8,705
Total	$	46,022		$	(17,915	)	$	16,177

Components of the Company’s income tax provision (benefit) are as follows (in thousands):

	Year Ended December 31,
	2015			2014			2013
Current
Canadian	$	96		$	175		$	—
U.S.		8,136			3,615			1,662
Other		3,854			1,940			652
		12,086			5,730			2,314
Deferred
Canadian		—			—			—
U.S.		(3,239	)		(6,731	)		2,206
Other		1,547			(5	)		1,680
		(1,692	)		(6,736	)		3,886
Total	$	10,394		$	(1,006	)	$	6,200

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

The Company is incorporated in Canada and therefore uses the Canadian statutory rate for income tax disclosure. The reconciliation of the statutory Canadian tax rate to the effective tax rate related to income before income taxes from continuing operations is as follows (in thousands, except percentage data):

	Year Ended December 31,
	2015			2014			2013
Statutory Canadian tax rate		27.00	%		27.00	%		26.00	%
Expected income tax provision at Canadian statutory tax rate	$	12,426		$	(4,837	)	$	4,206
International tax rate differences		304			(1,132	)		156
State income taxes, net		453			(271	)		148
Withholding and other taxes		680			421			321
Permanent differences		1,130			486			106
Section 199 deduction		(1,188	)		(574	)		—
Change in valuation allowance		(612	)		4,809			(3,076	)
Provision to return differences		(617	)		962			(312	)
Tax credits		(990	)		(1,678	)		(938	)
Net operating loss expirations		—			—			4,538
Statutory tax rate change		95			(13	)		354
Uncertain tax positions		121			134			259
IRS audit		(748	)		241			680
JK Lasers divestiture		(1,432	)		—			—
Goodwill impairment		—			330			—
Other		772			116			(242	)
Reported income tax provision (benefit)	$	10,394		$	(1,006	)	$	6,200
Effective tax rate		22.6	%		5.6	%		38.3	%

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Deferred income taxes result principally from temporary differences in the recognition of certain revenue and expense items and operating loss and tax credit carryforwards for financial and tax reporting purposes. Significant components of the Company’s deferred tax assets and liabilities as of December 31, 2015 and 2014 are as follows (in thousands):

	December 31,
	2015			2014
Deferred tax assets:
Losses & IRC Section 163(j) carryforwards	$	9,985		$	12,742
Compensation related deductions		2,915			3,749
Tax credits		2,409			3,502
Restructuring related liabilities		294			64
Inventory		4,415			4,495
Depreciation		503			683
Amortization		3,205			—
Warranty		1,127			876
Other		1,281			2,206
Total deferred tax assets		26,134			28,317
Valuation allowance for deferred tax assets		(12,537	)		(14,495	)
Net deferred tax assets	$	13,597		$	13,822
Deferred tax liabilities:
Equity investment	$	(1,733	)	$	(1,594	)
Depreciation		—			(341	)
Amortization		(2,791	)		(36	)
Unrealized currency gain/loss		(1,292	)		(2,595	)
Other		(345	)		(525	)
Total deferred tax liabilities	$	(6,161	)	$	(5,091	)
Net deferred income tax assets (liabilities)	$	7,436		$	8,731

In determining its income tax provisions, the Company calculated deferred tax assets and liabilities for each separate jurisdiction. The Company then considered a number of factors, including positive and negative evidence related to the realization of its deferred tax assets, to determine whether a valuation allowance should be recognized with respect to its deferred tax assets.

In 2015, the Company recorded valuation allowance of $0.8 million against its current year net operating losses in certain tax jurisdictions. Further, the Company released $0.8 million of valuation allowance recorded on certain U.S. state tax net operating losses and utilized $0.6 million of its U.S. capital loss carryforward against the current year net capital gain.

In 2014, the Company recorded valuation allowance of $0.3 million against its current year net operating losses in certain tax jurisdictions and increased valuation allowance recorded on certain U.S. state tax net operating losses by $0.3 million and capital loss carryforwards by $0.4 million.

In 2013, the Company adjusted a portion of its Canadian loss carryforward and the related valuation allowance of $4.8 million. The Company also recorded $1.3 million valuation allowances against its 2013 net operating losses in certain other tax jurisdictions and released valuation allowance of $0.3 million previously recorded on certain U.S. state tax credits. Additionally, the Company adjusted the carrying value of deferred tax assets on net operating losses and tax credits and their related valuation allowance in Canada and the U.K. as a result of changes in statutory tax rates amounting to $0.7 million in 2013.

Valuation allowance continues to be provided on the remaining balances of the U.S. capital loss, certain U.S. state net operating loss and certain foreign tax attributes that the Company has determined that it is more likely than not that they will not be realized. In conjunction with the Company’s ongoing review of its actual results and anticipated future earnings, the Company continuously reassesses the possibility of releasing the valuation allowance currently in place on its deferred tax assets.

As of December 31, 2015, the Company had net operating loss carryforwards of $4.9 million (tax effected) available to reduce future taxable income. Of this amount, approximately $1.6 million relates to the U.S. and expires through 2034; $2.4 million relates to

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Canada and expires starting in 2031; $0.7 million relates to the U.K. and can be carried forward indefinitely; and other countries of $0.2 million, which will start expiring in 2020.

As of December 31, 2014, the Company had net operating loss carryforwards of $4.5 million (tax effected) available to reduce future taxable income. Of this amount, approximately $1.4 million relates to the U.S. and expires through 2033; $2.3 million relates to Canada and expires starting in 2015; and $0.8 million relates to the U.K. and can be carried forward indefinitely.

As of December 31, 2015, the Company had tax credit carryforwards of approximately $2.4 million available to reduce income taxes in future years. Approximately $0.7 million relates to the U.S. state tax attributes, of which $0.6 million will expire through 2030 and $0.1 million can be carried forward indefinitely. The remaining $1.7 million tax credit carryforwards were related to Canada, of which $1.1 million expires through 2022 and $0.6 million can be carried forward indefinitely.

As of December 31, 2014, the Company had tax credit carryforwards of approximately $4.2 million available to reduce income taxes in future years. Approximately $2.1 million relates to the U.S. tax attributes (both federal and state) and expires through 2034. The remaining $2.1 million relates to Canada, of which $0.8 million expires through 2021 and $1.3 million can be carried forward indefinitely.

Income and foreign withholding taxes have not been recognized on the excess of the amount for financial reporting purposes over the tax basis of investments in foreign subsidiaries that are essentially permanent in nature. This amount becomes taxable upon a repatriation of assets from a subsidiary or a sale or liquidation of a subsidiary. The amount of undistributed earnings of foreign subsidiaries totaled $18.2 million as of December 31, 2015. The estimated unrecognized deferred income tax liabilities on this temporary difference is approximately $0.4 million.

As of December 31, 2015, the Company’s total amount of gross unrecognized tax benefits was $5.5 million, of which $4.1 million would favorably affect its effective tax rate. Over the next twelve months, the Company may need to record up to $1.2 million of previously unrecognized tax benefits in the event of statute of limitations closures. The Company believes there are no other jurisdictions in which the outcome of unresolved issues or claims is likely to be material to its results of operations, financial position or cash flows. Furthermore, the Company believes it has adequately provided for all income tax uncertainties.

As of December 31, 2014, the Company’s total amount of gross unrecognized tax benefits was $6.3 million, of which $4.1 million would favorably affect its effective tax rate, if recognized. As of December 31, 2013, the Company’s total amount of gross unrecognized tax benefits was $7.1 million, of which $4.9 million would favorably affect its effective tax rate, if recognized.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

The reconciliation of the total amounts of unrecognized tax benefits is as follows (in thousands):

Balance at December 31, 2012	$	7,554
Additions based on tax positions related to the current year		508
Additions for tax positions of prior years		1,475
Reductions for tax positions of prior years		(1,888	)
Reductions to tax positions resulting from a lapse of the applicable statute of limitations		(575	)
Balance at December 31, 2013		7,074
Additions based on tax positions related to the current year		1,180
Additions for tax positions of prior years		2,601
Reductions for tax positions of prior years		(2,404	)
Reductions to tax positions resulting from a lapse of the applicable statute of limitations		(2,177	)
Balance at December 31, 2014		6,274
Additions based on tax positions related to the current year		752
Additions for tax positions of prior years		78
Reductions for tax positions of prior years		(626	)
Reductions to tax positions resulting from a lapse of the applicable statute of limitations		(226	)
Settlements with tax authorities		(762	)
Balance at December 31, 2015	$	5,490

The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. As of each of December 31, 2015 and 2014, the Company had approximately $0.9 million of accrued interest and penalties related to uncertain tax positions. During the year ended December 31, 2015, the Company recognized less than $0.1 million of expense for an increase in interest and penalties related to uncertain tax positions. During the year ended December 31, 2014, the Company recognized approximately $0.3 million of expense for an increase in interest and penalties related to uncertain tax positions.

The Company files income tax returns in Canada, the U.S., and various states and foreign jurisdictions. Generally, the Company is no longer subject to U.S. or foreign income tax examinations by tax authorities for the years before 2007.

The Company’s income tax returns may be reviewed by tax authorities in the following countries for the following periods under the appropriate statute of limitations:

United States	2009 -  Present
Canada	2010 -  Present
United Kingdom	2014 -  Present
Germany	2008 -  Present
Netherlands	2010 -  Present
China	2012 -  Present
Japan	2011 -  Present

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

14. Restructuring, Acquisition and Divestiture Related Costs

The following table summarizes restructuring, acquisition and divestiture related costs recorded in the accompanying consolidated statements of operations (in thousands):

	Year Ended December 31,
	2015		2014		2013
2016 restructuring	$	3,148	$	—	$	—
2015 restructuring		1,484		—		—
2013 restructuring		—		25		2,463
2011 restructuring		1,208		389		1,287
Germany restructuring		—		—		7
Total restructuring charges	$	5,840	$	414	$	3,757
Acquisition and related charges	$	1,301	$	1,521	$	1,630
Divestiture related charges		1,113		—		—
Total acquisition and divestiture related charges	$	2,414	$	1,521	$	1,630
Total restructuring, acquisition and divestiture related costs	$	8,254	$	1,935	$	5,387

2016 Restructuring

During the third quarter of 2015, the Company initiated the 2016 restructuring program, which includes consolidating certain of our manufacturing operations to optimize our facility footprint and better utilize resources, and reducing redundant costs due to productivity cost savings and business volume reductions. Restructuring costs incurred in 2015 of $2.6 million, $0.3 million and $0.2 million were related to severance, facility, and other, respectively. We anticipate completing the 2016 restructuring program during the second quarter of 2016.

The following table summarizes restructuring costs associated with the 2016 restructuring program for each segment and unallocated corporate costs for the year ended December 31, 2015 (in thousands):

	Year Ended
	December 31, 2015		Expected Cumulative Costs
Laser Products	$	55	$300  ̶  $400
Vision Technologies		2,200	3,200  ̶  3,700
Precision Motion		833	700  ̶  1,000
Unallocated Corporate and Shared Services		60		300  ̶  400
Total	$	3,148	$4,500   ̶  $5,500

2015 Restructuring

During the first quarter of 2015, the Company implemented a program to eliminate redundant costs, as a result of acquisition and divestiture activities, to better align our operations to our strategic growth plans, to further integrate our business lines, and as a consequence of our productivity initiatives. Restructuring costs incurred in 2015 of $1.4 million and $0.1 million were related to severance and other, respectively. The plan was substantially completed during 2015.

The following table summarizes the total costs for each segment and unallocated corporate costs related to the 2015 restructuring plan (in thousands):

	Year Ended
	December 31, 2015
Laser Products	$	542
Vision Technologies		525
Precision Motion		79
Unallocated Corporate and Shared Services		338
Total	$	1,484

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GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

2013 Restructuring

During the first half of 2013, the Company initiated a program following our acquisition of NDS to integrate the NDS business into our operating structure and further reduce manufacturing and operating costs across businesses to leverage our infrastructure and further integrate our product lines.

The following table summarizes restructuring costs for each segment and unallocated corporate costs related to the 2013 restructuring program (in thousands):

	Year Ended
	December 31, 2013
Laser Products	$	836
Vision Technologies		806
Precision Motion		378
Unallocated Corporate and Shared Services		443
Total	$	2,463

2011 Restructuring

In November 2011, the Company announced a strategic initiative (“2011 restructuring”) which aimed to consolidate operations to reduce the Company’s cost structure and improve operational efficiency. In total, eleven facilities have been exited as part of the 2011 restructuring plan. These eliminations resulted in the consolidation of the manufacturing facilities of the Scientific Lasers business and the optics products, the consolidation of the Company’s German operations into one facility, the consolidation of the laser scanners business into the Company’s Bedford, Massachusetts facility and the consolidation of the Company’s Japan operation into one facility. Included in the eleven facilities exited are five facilities exited as part of the Semiconductor and Laser Systems business divestitures. The restructuring costs for the Semiconductor and Laser Systems businesses have been excluded from the table below as they have been reported as part of the operating results from discontinued operations. The Company substantially completed the 2011 restructuring program in 2013. Restructuring costs from the 2011 restructuring program recognized in 2014 and 2015 are primarily depreciation and other costs for the idle facility that was vacated by the Laser Systems business.

The following table summarizes restructuring costs for each segment and unallocated corporate costs related to the 2011 restructuring plan (in thousands):

								Cumulative
	Year Ended December 31,							Costs as of
	2015		2014			2013		December 31, 2015
Laser Products	$	—	$	(106	)	$	1,042	$	1,939
Vision Technologies		—		—			48		48
Precision Motion		—		—			5		122
Unallocated Corporate and Shared Services		1,208		495			192		3,153
Total	$	1,208	$	389		$	1,287	$	5,262

Presented below are actual cash charges, including severance, relocation, facility closure and consulting costs, and non-cash charges for depreciation related to the 2011 restructuring plan (in thousands):

								Cumulative
	Year Ended December 31,							Costs as of
	2015		2014			2013		December 31, 2015
Cash charges	$	126	$	(235	)	$	1,037	$	3,174
Non-cash charges		1,082		624			250		2,088
Total restructuring costs	$	1,208	$	389		$	1,287	$	5,262

Rollforward of Accrued Expenses Related to Restructuring

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

The following table summarizes the accrual activities, by component, related to the Company’s restructuring charges recorded in the accompanying consolidated balance sheets (in thousands):

	Total			Severance			Facility			Depreciation			Other
Balance at December 31, 2013	$	1,374		$	687		$	648		$	—		$	39
Restructuring charges		414			(83	)		(247	)		624			120
Cash payments		(933	)		(502	)		(293	)		—			(138	)
Non-cash write-offs and other adjustments		(624	)		—			—			(624	)		—
Balance at December 31, 2014		231			102			108			—			21
Restructuring charges		5,840			3,918			441			1,082			399
Cash payments		(3,126	)		(2,668	)		(156	)		—			(302	)
Non-cash write-offs and other adjustments		(1,063	)		6			13			(1,082	)		—
Balance at December 31, 2015	$	1,882		$	1,358		$	406		$	—		$	118

The Company expects to make $1.8 million in cash payments during the twelve months ending December 31, 2016.

Acquisition and Divestiture Related Charges

Acquisition related costs incurred to effect a business combination, including finders’ fees, legal, valuation and other professional or consulting fees, totaled $1.5 million, $0.9 million, and $1.6 million during 2015, 2014, and 2013, respectively. Acquisition related costs recognized under earn-out agreements in connection with acquisitions totaled $(0.2) million, $0.6 million, and zero during 2015, 2014, and 2013, respectively. Expenses associated with divestiture activities of $1.1 million during 2015 included legal and professional fees directly related to the completion of the JK Lasers divestiture.

15. Commitments and Contingencies

Operating Leases

The Company leases certain equipment and facilities under operating lease agreements. Most of these lease agreements expire between 2017 and 2019. In the U.K., where longer lease terms are more common, the Company has a land lease that extends through 2078. During the years ended December 31, 2015, 2014 and 2013, the Company recorded lease expense of $4.5 million, $4.1 million and $4.9 million, respectively. In addition to the base rent, the Company is generally required to pay insurance, real estate taxes and maintenance costs which is recorded in lease expense.  

In connection with the sale of the Scientific Lasers business in 2014, the Company assigned to the buyer the lease for the facility in San Jose, California, where the Scientific Lasers business operated. The buyer assumed all of our rights and obligations under the original lease, including the duty to pay the rent for the remainder term of the lease. So long as the buyer performs its obligations as the tenant, as required by the Asset and Equity Purchase Agreement for its acquisition of the Scientific Lasers business, the Company has no responsibilities for the lease. Should the buyer cease performance under the lease, however, the landlord could still pursue the Company as the original tenant until February 28, 2019, the end of the lease term. In the meantime, the Company has indemnification rights against the buyer under the Asset and Equity Purchase Agreement for such buyer’s default. The lease associated with this facility has been excluded from the operating lease commitments table below.

86

GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Capital Leases

     As of December 31, 2015 and 2014, the Company has gross assets under capital lease of $13.2 and $12.7 million, respectively.  

  Future Lease Payments

     Future minimum lease payments under operating and capital leases expiring subsequent to December 31, 2015, including operating leases associated with facilities that have been vacated as a result of the Company’s restructuring actions, are as follows (in thousands):

Year Ending December 31,	Operating Lease		Capital Lease(1)
2016	$	4,973	$	1,498
2017		3,536		1,398
2018		2,723		968
2019		1,735		935
2020		154		907
Thereafter		5,361		8,139
Total minimum lease payments	$	18,482	$	13,845

(1) Capital lease payments include interest payments of $3.8 million.

Purchase Commitments

As of December 31, 2015, the Company had unconditional commitments primarily for inventory purchases of $35.9 million. These purchase commitments are expected to be incurred as follows: $34.1 million in 2016, $1.5 million in 2017, and $0.3 million in 2018.

Legal Proceedings

The Company is subject to various legal proceedings and claims that arise in the ordinary course of business. The Company does not believe that the outcome of these claims will have a material adverse effect upon its consolidated financial statements but there can be no assurance that any such claims, or any similar claims, would not have a material adverse effect upon its consolidated financial statements.

Guarantees and Indemnifications

In the normal course of its operations, the Company executes agreements that provide for indemnification and guarantees to counterparties in transactions such as business dispositions, sale of assets, sale of products and operating leases. Additionally, the by-laws of the Company require it to indemnify certain current or former directors, officers, and employees of the Company against expenses incurred by them in connection with each proceeding in which he or she is involved as a result of serving or having served in certain capacities. Indemnification is not available with respect to a proceeding as to which it has been adjudicated that the person did not act in good faith in the reasonable belief that the action was in the best interests of the Company. Certain of our officers and directors are also a party to indemnification agreements with the Company. These indemnification agreements provide, among other things, that the director and officer shall be indemnified to the fullest extent permitted by applicable law against all expenses, judgments, fines and amounts paid in settlement actually and reasonably incurred by such officer or director in connection with any proceeding by reason of his or her relationship with the Company. In addition, the indemnification agreements provide for the advancement of expenses incurred by such director or officer in connection with any proceeding covered by the indemnification agreement, subject to the conditions set forth therein and to the extent such advancement is not prohibited by law. The indemnification agreements also set out the procedures for determining entitlement to indemnification, the requirements relating to notice and defense of claims for which indemnification is sought, the procedures for enforcement of indemnification rights, the limitations on and exclusions from indemnification, and the minimum levels of directors’ and officers’ liability insurance to be maintained by the Company.

On July 1, 2013, the Company provided a Guarantee (the “Guarantee”) in favor of the trustees of the U.K. Plan with respect to all present and future obligations and liabilities (whether actual or contingent and whether owed jointly or severally and in any capacity whatsoever) of GSI Group Limited, a wholly owned subsidiary of GSI Group Inc.

87

GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Credit Risks and Other Uncertainties

The Company maintains financial instruments such as cash and cash equivalents and trade receivables. From time to time, certain of these instruments may subject the Company to concentrations of credit risk whereby one institution may hold a significant portion of the cash and cash equivalents, or one customer may represent a large portion of the accounts receivable balances.

There was no significant concentration of credit risk related to the Company’s position in trade accounts receivable as no individual customer represented 10% or more of the Company’s outstanding accounts receivable at December 31, 2015 and 2014. Credit risk with respect to trade accounts receivables is generally minimized because of the diversification of the Company’s operations, as well as its large customer base and its geographical dispersion.

Certain of the components and materials included in the Company’s products are currently obtained from single source suppliers. There can be no assurance that a disruption of this outside supply would not create substantial manufacturing delays and additional cost to the Company.

The Company’s operations involve a number of other risks and uncertainties including, but not limited to, the effects of general economic conditions, rapidly changing technology, and international operations.

16. Segment Information

Reportable Segments

The Company evaluates the performance of, and allocates resources to, its segments based on revenue, gross profit and operating profit. The Company’s reportable segments have been identified based on commonality and adjacency of technologies, applications and customers amongst the Company’s individual product lines.

We operate in three reportable segments: Laser Products, Vision Technologies (formerly known as Medical Technologies), and Precision Motion. The reportable segments and their principal activities consist of the following:

Laser Products

The Laser Products segment designs, manufactures and markets photonics-based solutions, including CO2 laser sources, laser scanning and beam delivery products, to customers worldwide. The segment serves highly demanding photonics-based applications such as industrial material processing, metrology, medical and life science imaging, and medical laser procedures. The vast majority of the segment’s product offerings are sold to OEM customers. The segment sells these products both directly, utilizing a highly technical sales force, and indirectly, through resellers and distributors.

Vision Technologies

The Vision Technologies segment designs, manufactures and markets a range of medical grade technologies, including visualization solutions, imaging informatics products, optical data collection and machine vision technologies, radio frequency identification technologies (RFID), thermal printers, and light and color measurement instrumentation to customers worldwide. The vast majority of the segment’s product offerings are sold to OEM customers. The segment sells these products both directly, utilizing a highly technical sales force, and indirectly, through resellers and distributors.

Precision Motion

The Precision Motion segment designs, manufactures and markets optical encoders, precision motor and motion control technology, air bearing spindles and precision machined components to customers worldwide. The vast majority of the segment’s product offerings are sold into the advanced industrial market and the medical market. The segment sells these products both directly, utilizing a highly technical sales force, and indirectly, through resellers and distributors.

88

GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Reportable Segment Financial Information

Revenue, gross profit, operating income (loss) from continuing operations, depreciation and amortization, accounts receivable and inventory by reportable segments are as follows (in thousands):

	Year Ended December 31,
	2015		2014		2013
Revenue
Laser Products	$	168,331	$	177,726	$	166,598
Vision Technologies		124,725		122,187		90,276
Precision Motion		80,542		64,793		60,036
Total	$	373,598	$	364,706	$	316,910

	Year Ended December 31,
	2015			2014			2013
Gross Profit
Laser Products	$	73,602		$	74,224		$	68,819
Vision Technologies		48,966			48,678			35,824
Precision Motion		36,709			28,333			27,778
Unallocated Corporate and Shared Services		(1,387	)		(1,068	)		(194	)
Total	$	157,890		$	150,167		$	132,227

	Year Ended December 31,
	2015			2014			2013
Operating Income (Loss) from Continuing Operations
Laser Products	$	35,971		$	33,053		$	25,143
Vision Technologies		(2,057	)		(43,079	)		3,566
Precision Motion		16,877			13,023			12,062
Unallocated Corporate and Shared Services		(21,858	)		(19,803	)		(21,325	)
Total	$	28,933		$	(16,806	)	$	19,446

	Year Ended December 31,
	2015		2014		2013
Depreciation and Amortization
Laser Products	$	6,083	$	6,481	$	6,335
Vision Technologies		8,599		13,254		8,808
Precision Motion		2,533		1,943		1,979
Unallocated Corporate and Shared Services		2,981		2,743		2,828
Total	$	20,196	$	24,421	$	19,950

89

GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

	December 31,
	2015		2014
Accounts Receivable
Laser Products		21,763		24,083
Vision Technologies		21,691		18,922
Precision Motion		13,734		8,489
Total accounts receivable		57,188		51,494
Inventory
Laser Products		29,501		34,947
Vision Technologies		19,583		19,596
Precision Motion		10,482		8,400
Total inventory		59,566		62,943
Total segment assets		116,754		114,437

	December 31,
	2015		2014
Total Assets
Total segment assets		116,754		114,437
Cash and cash equivalents		59,959		51,146
Income taxes receivable		2,510		5,906
Deferred tax assets		—		5,971
Prepaid expenses and other current assets		5,989		5,081
Assets of discontinued operations		—		631
Property, plant and equipment, net		40,550		40,088
Deferred tax assets		7,885		2,912
Other assets		12,673		12,134
Intangible assets, net		66,269		67,242
Goodwill		103,456		90,746
Total	$	416,045	$	396,294

Geographic Information

The Company aggregates geographic revenue based on the customer location where products are shipped. Revenue to these customers is as follows (in thousands, except percentage data):

	Year Ended December 31,
	2015					2014					2013
	Revenue		% of Total			Revenue		% of Total			Revenue		% of Total
United States	$	154,825		41.4	%	$	140,973		38.7	%	$	107,892		34.0	%
Germany		54,743		14.7			59,029		16.2			56,287		17.8
Rest of Europe		48,277		12.9			54,308		14.9			45,698		14.4
China		38,491		10.3			40,792		11.2			37,651		11.9
Rest of Asia-Pacific		62,467		16.7			58,830		16.1			57,802		18.2
Other		14,795		4.0			10,774		2.9			11,580		3.7
Total	$	373,598		100.0	%	$	364,706		100.0	%	$	316,910		100.0	%

90

GSI GROUP INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AS OF DECEMBER 31, 2015

Long-lived assets consist of property, plant and equipment, net, and are aggregated based on the location of the assets. A summary of these long-lived assets is as follows (in thousands):

	December 31,
	2015		2014
United States	$	34,907	$	32,988
Europe		4,014		5,318
China		1,593		1,705
Asia-Pacific and other		36		77
Total	$	40,550	$	40,088

Significant Customers

No customer accounted for greater than 10% of the Company’s sales during the years ended December 31, 2015, 2014 or 2013.

91

Supplementary Information

(Unaudited)

The Company’s interim financial statements are prepared on a quarterly basis ending on the Friday closest to the end of the calendar quarter, with the exception of the fourth quarter which always ends on December 31.

On April 15, 2015, the Company completed the sale of certain assets and liabilities of the JK Lasers business for $29.6 million in cash, net of the final working capital adjustments and transaction costs, and recorded a pre-tax gain on sale of $19.6 million.

In December 2014, the Company determined that an impairment test of the NDS goodwill and intangible assets was required, resulting in an impairment charge of $41.4 million in operating expenses.

On March 14, 2014, the Company acquired JADAK and started to include the operating results of JADAK in the consolidated financial statements as of the acquisition date. In July 2014, the Company completed the sale of certain assets and liabilities of the Scientific Lasers business for $6.5 million in cash, net of working capital adjustments, and recorded a $1.7 million loss on sale.

The following tables reflect the Company’s unaudited condensed consolidated statements of operations (in thousands except per share data):

	Three Months Ended
	December 31,			October 2,		July 3,			April 3,
	2015			2015		2015			2015
Revenue	$	90,219		$	92,271	$	96,494		$	94,614
Cost of revenue		53,590			52,361		55,149			54,608
Gross profit		36,629			39,910		41,345			40,006
Operating expenses:
Research and development and engineering		7,295			7,693		7,840			8,215
Selling, general and administrative		19,080			19,979		20,922			22,068
Amortization of purchased intangible assets		2,018			1,852		1,852			1,889
Restructuring, acquisition and divestiture related costs		4,022			1,379		416			2,437
Total operating expenses		32,415			30,903		31,030			34,609
Operating income from continuing operations		4,214			9,007		10,315			5,397
Interest income (expense), foreign exchange transaction gains (losses), other income (expense), net and gain on disposal of business		1,721			13		15,506			(151	)
Income from continuing operations before income taxes		5,935			9,020		25,821			5,246
Income tax provision (benefit)		(168	)		2,452		6,310			1,800
Income from continuing operations		6,103			6,568		19,511			3,446
Loss from discontinued operations, net of tax		—			—		(13	)		—
Consolidated net income	$	6,103		$	6,568	$	19,498		$	3,446
Earnings per common share from continuing operations:
Basic	$	0.18		$	0.19	$	0.56		$	0.10
Diluted	$	0.18		$	0.19	$	0.56		$	0.10
Loss per common share from discontinued operations:
Basic	$	—		$	—	$	(0.00	)	$	—
Diluted	$	—		$	—	$	(0.00	)	$	—
Earnings per common share attributable to GSI Group Inc.
Basic	$	0.18		$	0.19	$	0.56		$	0.10
Diluted	$	0.18		$	0.19	$	0.56		$	0.10

92

	Three Months Ended
	December 31,			September 26,			June 27,			March 28,
	2014			2014			2014			2014
Revenue	$	94,012		$	94,656		$	96,905		$	79,133
Cost of revenue		54,284			54,973			58,254			47,028
Gross profit		39,728			39,683			38,651			32,105
Operating expenses:
Research and development and engineering		7,837			7,735			7,525			5,857
Selling, general and administrative		21,840			21,512			21,410			19,618
Amortization of purchased intangible assets		2,799			2,843			2,876			1,744
Restructuring, acquisition and divestiture related costs		(14	)		771			360			818
Impairment of goodwill and intangible assets		41,442			—			—			—
Total operating expenses		73,904			32,861			32,171			28,037
Operating income (loss) from continuing operations		(34,176	)		6,822			6,480			4,068
Interest income (expense), foreign exchange transaction gains (losses) and other income (expense), net		(127	)		310			(1,017	)		(275	)
Income (loss) from continuing operations before income taxes		(34,303	)		7,132			5,463			3,793
Income tax provision (benefit)		(6,013	)		2,013			2,057			937
Income (loss) from continuing operations		(28,290	)		5,119			3,406			2,856
Loss from discontinued operations, net of tax		(790	)		(273	)		(2,678	)		(1,866	)
Loss on disposal of discontinued operations, net of tax		(1,405	)		(321	)		—			—
Consolidated net income (loss)		(30,485	)		4,525			728			990
Less: Net income attributable to noncontrolling interest		—			—			(3	)		(7	)
Net income (loss) attributable to GSI Group Inc.	$	(30,485	)	$	4,525		$	725		$	983
Earnings (loss) per common share from continuing operations:
Basic	$	(0.82	)	$	0.15		$	0.10		$	0.08
Diluted	$	(0.82	)	$	0.15		$	0.10		$	0.08
Loss per common share from discontinued operations:
Basic	$	(0.06	)	$	(0.02	)	$	(0.08	)	$	(0.05	)
Diluted	$	(0.06	)	$	(0.02	)	$	(0.08	)	$	(0.05	)
Earnings (loss) per common share attributable to GSI Group Inc.
Basic	$	(0.88	)	$	0.13		$	0.02		$	0.03
Diluted	$	(0.88	)	$	0.13		$	0.02		$	0.03

93

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A. Controls and Procedures

The required certifications of our Chief Executive Officer and Chief Financial Officer are included in Exhibits 31.1 and 31.2 to this Annual Report on Form 10-K. The disclosures set forth in this Item 9A contain information concerning the evaluation of our disclosure controls and procedures, management’s report on internal controls over financial reporting and changes in internal control over financial reporting referred to in those certifications. Those certifications should be read in conjunction with this Item 9A for a more complete understanding of the matters covered by the certifications.

Evaluation of Disclosure Controls and Procedures as of December 31, 2015

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, conducted an evaluation of our disclosure controls and procedures, as such term is defined under Rule 13a-15(e) promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Based on this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of December 31, 2015.

Changes in Internal Control Over Financial Reporting

During the fiscal quarter ended March 28, 2014, the Company acquired JADAK.  Other than the changes to our internal controls to integrate JADAK into the Company, there were no changes to our internal control over financial reporting during the fiscal quarter ended December 31, 2015 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Management’s Annual Report on Internal Control Over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rules 13a-15(f) under the Exchange Act. Internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external reporting purposes in accordance with generally accepted accounting principles. Internal control over financial reporting includes those policies and procedures that:

· pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect our transactions and dispositions of our assets;

· provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that our receipts and expenditures are being made only in accordance with authorizations of our management and directors; and

· provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions and that the degree of compliance with the policies or procedures may deteriorate.

Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2015. In making their assessment, our management utilized the criteria set forth in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) in 2013. Based on our evaluation under the framework in Internal Control—Integrated Framework, issued by COSO in 2013, our management concluded that our internal control over financial reporting was effective as of December 31, 2015.

The effectiveness of our internal control over financial reporting as of December 31, 2015 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which is contained in Item 8 of this Annual Report on Form 10-K.

94

Item 9B. Other Information

None.

Certain information required by Part III is omitted from this Annual Report on Form 10-K and is incorporated herein by reference to the Company’s Definitive Proxy Statement for the 2016 Annual Meeting of Shareholders to be filed with the Securities and Exchange Commission.

95

PART III

Item 10. Directors, Executive Officers and Corporate Governance

All of the Company’s directors, officers and employees must act in accordance with the Code of Ethics and Business Conduct, which has been adopted by the Company’s Board of Directors. A copy of the Code of Ethics and Business Conduct is available on the Company’s website at http://www.gsig.com in the “About GSI” section. (This website address is not intended to function as a hyperlink, and the information contained in our website is not intended to be a part of this filing). The Company will provide to any person without charge, upon request, a copy of the Code of Ethics and Business Conduct. Such a request should be made in writing and addressed to GSI Group Inc., Attention: Investor Relations, 125 Middlesex Turnpike, Bedford, MA 01730. The Company intends to satisfy the disclosure requirement under NASDAQ rules regarding waivers or under Item 5.05 of Form 8-K regarding disclosure of an amendment to, or waiver from, a provision of this Code of Ethics and Business Conduct with respect to its principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, by posting such information on the Company’s website at http://www.gsig.com in the “About GSI” section, unless a Form 8-K is otherwise required by law or applicable listing rules.

The remainder of the response to this item is contained in the Proxy Statement for the Company’s Annual Meeting of Shareholders scheduled to be held on May 10, 2016 and is incorporated herein by reference.

Item 11. Executive Compensation

The information required to be disclosed by this item is contained in the Proxy Statement for the Company’s Annual Meeting of Shareholders scheduled to be held on May 10, 2016 and is incorporated herein by reference.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required to be disclosed by this item is contained in the Proxy Statement for the Company’s Annual Meeting of Shareholders scheduled to be held on May 10, 2016 and is incorporated herein by reference.

Item 13. Certain Relationships and Related Transactions, and Director Independence

The information required to be disclosed by this item is contained in the Proxy Statement for the Company’s Annual Meeting of Shareholders scheduled to be held on May 10, 2016 and is incorporated herein by reference.

Item 14. Principal Accounting Fees and Services

The information required to be disclosed by this item is contained in the Proxy Statement for the Company’s Annual Meeting of Shareholders scheduled to be held on May 10, 2016 and is incorporated herein by reference.

96

PART IV

Item 15. Exhibits and Financial Statement Schedules

(a) Documents filed as part of this report:

1. List of Financial Statements

The financial statements required by this item are listed in Item 8, “Financial Statements and Supplementary Data” herein.

2. List of Financial Statement Schedules

All schedules are omitted because they are not applicable, not required or the required information is shown in the consolidated financial statements or notes thereto.

3. List of Exhibits

See the Company’s SEC filings on Edgar at: http://www.sec.gov/ for all Exhibits.

		Incorporated by Reference
Exhibit Number	Exhibit Description	Form		File No.		Exhibit		Filing Date		Filed/ Furnished Herewith
2.1	Agreement and Plan of Merger, by and among the Registrant, Eagle Acquisition Corporation, and Excel Technology, Inc. dated July 9, 2008.		8-K		000-25705		2.1		7/11/08
2.2	Asset Purchase Agreement, by and between GSI Group Corporation and Gooch & Housego (California) LLC., dated July 3, 2008.		10-Q		000-25705		2.1		4/13/10
2.3	Final Fourth Modified Joint Chapter 11 Plan of Reorganization for the Registrant, GSI Group Corporation, and MES International, Inc., dated as of May 24, 2010, as supplemented on May 27, 2010, and as confirmed by the United States Bankruptcy Court for the District of Delaware on May 27, 2010.		8-K		000-25705		99.2		05/28/10
2.4	Master Purchase and Sale Agreement, dated April 9, 2013, between GSI Group Inc., GSI Group Corporation, GSI Group Corporation, Korea Branch, GSI Group Corporation, Taiwan Branch, GSI Group Japan Corporation, GSI Group GmbH and Electro Scientific Industries, Inc.		8-K		000-25705		2.1		5/09/13
2.5	Securities Purchase Agreement dated January 15, 2013, between NDSSI Holdings, LLC, NDS Surgical Imaging, Inc., GSI Group Inc. and GSI Group Limited UK.		8-K		001-35083		2.1		01/15/13
2.6	Equity Purchase Agreement dated February 18, 2014, between JADAK, LLC, JADAK Technologies, Inc., Advanced Data Capture Corporation, GSI Group Inc. and GSI Group Corporation.		8-K		001-35083		10.1		02/18/14
2.7	Asset and Equity Purchase Agreement, dated June 24, 2014, by and among GSI Group Inc., Excel Technology, Inc., Continuum Electro-Optics, Inc., GSI Europe GmbH, GSI Group France S.A.S., GSI Group Japan Corporation and Amplitude Laser, Inc. and Amplitude Technologies, S.A. (The registrant hereby agrees to furnish a copy of any omitted schedule to the Commission upon request.)		8-K		001-35083		2.1		07/21/14
2.8	Purchase Agreement, dated April 15, 2015, by and among GSI Group Limited, GSI Group Corporation, GSI Group Europe GmbH, GSI Group Japan Corporation, GSI Group Precision Technologies (Suzhou) Co., LTD., GSI Group Inc., JKL Newco Limited, and SPI Lasers UK Limited, SPI Lasers LLC, SPI Lasers (Shanghai) Co., Ltd. and Trumpf Corporation. (The registrant hereby agrees to furnish a copy of any omitted schedule to the Commission upon request.)		8-K		001-35083		10.1		04/20/15
3.1	Certificate and Articles of Continuance of the Registrant, dated March 22, 1999.		S-3		333-202597		3.1		03/09/15
3.2	By-Laws of the Registrant, as amended.		10-Q		000-25705		3.2		4/13/10

97

		Incorporated by Reference
Exhibit Number	Exhibit Description	Form		File No.		Exhibit		Filing Date		Filed/ Furnished Herewith
3.3	Articles of Reorganization of the Registrant, dated July 23, 2010.		8-K		000-25705		3.1		07/23/10
3.4	Articles of Amendment of the Registrant, dated December 29, 2010.		S-3		333-202597		3.2		03/09/15
4.1	Specimen Stock Certificate		S-3		333-202597		4.2		03/09/15
4.2	Form of Indenture, between the Registrant and Wilmington Trust, National Association.		S-3		333-202597		4.3		03/09/15
10.1†	Form of Indemnification Agreement.		8-K		000-25705		10.1		06/10/09
10.2†	GSI Group, Inc. 2010 Incentive Award Plan (Amended and Restated Effective April 9, 2014).		8-K		000-35083		10.1		05/20/14
10.3†	Employment Agreement, dated as of November 16, 2010, between GSI Group Inc. and John Roush.		8-K		000-25705		10.1		11/17/10
10.4†	Employment Agreement, dated as of February 10, 2011, between GSI Group Inc. and Robert Buckley.		8-K		001-35083		10.1		02/11/11
10.5†	Form of Deferred Stock Unit Award Agreement.		10-K		001-35083		10.59		03/30/11
10.6†	Form of Restricted Stock Unit Award Agreement for John Roush and Robert Buckley.		10-K		001-35083		10.60		03/30/11
10.7	First Amendment to the Engagement Letter between the Registrant, GSI Group Corporation, MES International, Inc. and FTI Consulting, Inc., dated as of February 6, 2011.		10-K		001-35083		10.61		03/30/11
10.8†	Form of U.S. Restricted Stock Unit Award Agreement.		10-Q		001-35083		10.2		05/16/11
10.9†	Offer Letter, dated June 8, 2011, between GSI Group Inc. and Peter Chang.		10-Q		001-35083		10.1		11/10/11
10.10	Amended and Restated Lease, dated May 1, 2012, by and between GSI Group Inc. and 125 Middlesex Turnpike, LLC.		8-K		001-35083		10.1		05/04/12
10.11	Second Amendment to Credit Agreement, dated July 19, 2012, by and among GSI Group Corporation, GSI Group Inc., and Bank of America, N.A., as Administrative Agent.		8-K		001-35083		10.1		07/23/12
10.12	Third Amendment to Credit Agreement, dated October 16, 2012, by and among GSI Group Corporation, GSI Group, Inc., and Bank of America, N.A., as Administrative Agent.		10-Q		001-35083		10.3		11/07/12
10.13†	Severance Agreement, dated as of August 15, 2012, between GSI Group Inc. and Peter Chang.		10-Q		001-35083		10.7		11/07/12
10.14†	Offer Letter, dated August 24, 2012, between GSI Group Inc. and Matthijs Glastra.		10-Q		001-35083		10.7		11/07/12
10.15	Amended and Restated Credit Agreement, dated as of December 27, 2012, by and among GSI Group Corporation, GSI Group Inc., Bank of America, N.A., as Administrative Agent, Line Lender and L/C Issuer, Silicon Valley Bank, as Syndication Agent, and HSBC Bank USA, N.A., as Documentation Agent, and the other lenders party thereto.		8-K		001-35083		10.1		01/03/13
10.16	Consent and First Amendment to Amended and Restated Credit Agreement dated January 14, 2013 by and among GSI Group Corporation and Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer.		8-K		001-35083		10.1		01/15/13
10.17	Joinder and Amendment Agreement, dated as of February 1, 2013, by and among GSI Group Corporation, NDS Surgical Imaging, LLC, GSI Group Inc., Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer, and the other lenders party thereto.		8-K		001-35083		10.1		02/07/13

98

Incorporated by Reference

Exhibit Number

Exhibit Description

Form

File No.

Exhibit

Filing Date

Filed/ Furnished Herewith

10.18†

Letter Agreement, dated October 28, 2013, between GSI Group Inc. and Jamie Bader.

8-K

001-35083

10.1

10/30/13

10.19

Third Amendment to Amended and Restated Credit Agreement, dated September 13, 2013, by and among GSI Group Corporation, NDS Surgical Imaging, LLC, GSI Group Inc., each of the other Guarantors party hereto, each lender party hereto, and Bank of America, N.A., as Administrative Agent.

10-Q

001-35083

10.1

11/05/13

10.20

Lease Agreement, dated November 22, 2013, by and between Continuum Electro-Optics, Inc., GSI Group Corporation and Legacy Partners I San Jose, LLC.

8-K

001-35083

10.1

12/02/13

10.21

Fourth Amendment to Amended and Restated Credit Agreement, dated as of February 10, 2014, by and among GSI Group Corporation, NDS Surgical Imaging, LLC, GSI Group Inc., Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer, and the other lenders party thereto.

8-K

001-35083

10.1

02/14/14

10.22

Fifth Amendment to Amended and Restated Credit Agreement, dated as of January 22, 2016, by and among GSI Group Corporation, NDS Surgical Imaging, LLC, GSI Group Inc., Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer, and the other lenders party thereto.

*

10.23

Restricted Stock Unit Inducement Award Grant Notice

S-8

333-194557

99.1

03/14/14

10.24

Lease Agreement, dated as of May 31, 2013, by and between JADAK, LLC and Hancock Part Development, LLC.

10-Q

001-35083

10.3

05/06/14

10.25†

Severance Agreement between GSI Group Inc. and Deborah A. Mulryan, dated January 13, 2015.

10-K

001-35083

10.23

03/09/15

21.1

Subsidiaries of the Registrant.

*

23.1

Consent of Independent Registered Public Accounting Firm.

*

31.1

Chief Executive Officer Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

*

31.2

Chief Financial Officer Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

*

32.1

Chief Executive Officer Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

*

*

32.2

Chief Financial Officer Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

*

*

101.INS

XBRL Instance Document.

*

101.SCH

XBRL Schema Document.

*

101.CAL

XBRL Calculation Linkbase Document.

*

101.DEF

XBRL Definition Linkbase Document.

*

101.LAB

XBRL Labels Linkbase Document.

*

101.PRE

XBRL Presentation Linkbase Document.

*

† This exhibit constitutes a management contract, compensatory plan, or arrangement.

* Filed herewith

** Furnished herewith

99

Attached as Exhibit 101 to this report are the following formatted in XBRL (Extensible Business Reporting Language): (i) Consolidated Balance Sheets at December 31, 2015 and December 31, 2014, (ii) Consolidated Statements of Operations for the years ended December 31, 2015, December 31, 2014, and December 31, 2013, (iii) Consolidated Statements of Comprehensive Income (Loss) for the years ended December 31, 2015, December 31, 2014 and December 31, 2013, (iv) Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2015, December 31, 2014, and December 31, 2013, (v) Consolidated Statements of Cash Flows for the years ended December 31, 2015, December 31, 2014, and December 31, 2013, and (vi) Notes to Consolidated Financial Statements.

100

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

GSI GROUP INC.
By:	/s/ John A. Roush
	John A. Roush
	Chief Executive Officer

Date: March 2, 2016

101

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

GSI Group Inc. (Registrant)

Name	Title	Date
/s/ John A. Roush	Director, Chief Executive Officer	March 2, 2016
John A. Roush
/s/ Robert J. Buckley	Chief Financial Officer	March 2, 2016
Robert J. Buckley
/s/ Peter L. Chang	Vice President, Corporate Controller	March 2, 2016
Peter L. Chang	(Chief Accounting Officer)
/s/ Stephen W. Bershad	Chairman of the Board of Directors	March 2, 2016
Stephen W. Bershad
/s/ Harry L. Bosco	Director	March 2, 2016
Harry L. Bosco
/s/ Dennis J. Fortino	Director	March 2, 2016
Dennis J. Fortino
/s/ Ira J. Lamel	Director	March 2, 2016
Ira J. Lamel
/s/ Dominic A. Romeo	Director	March 2, 2016
Dominic A. Romeo
/s/ Thomas N. Secor	Director	March 2, 2016
Thomas N. Secor

102

EX-10.22

Exhibit 10.22

FIFTH AMENDMENT TO
AMENDED AND RESTATED CREDIT AGREEMENT

This FIFTH AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT dated as of January 15, 2016 (this “Fifth Amendment”) is made by and among GSI Group Corporation, a Michigan corporation (the “Lead Borrower”), NDS Surgical Imaging, LLC, a Delaware limited liability company (“NDS” and, together with the Lead Borrower, the “Borrowers” and each a “Borrower”), GSI Group Inc., a company continued and existing under the laws of the Province of New Brunswick, Canada (“Holdings”), each of the other Guarantors party hereto, each lender party hereto (collectively, the “Lenders” and individually, a “Lender”), and BANK OF AMERICA, N.A., as Administrative Agent (in such capacity, the “Administrative Agent”), Swing Line Lender and L/C Issuer.

WHEREAS, the Borrowers, the Lenders and the Administrative Agent are parties to that certain Amended and Restated Credit Agreement dated as of December 27, 2012 (as amended pursuant to that certain Consent and First Amendment to Amended and Restated Credit Agreement dated as of January 14, 2013, that certain Joinder and Amendment Agreement dated as of February 1, 2013, that certain Second Amendment to Amended and Restated Credit Agreement dated as of April 30, 2013, that certain Third Amendment to Amended and Restated Credit Agreement dated as of September 13, 2013, and that certain Fourth Amendment to Amended and Restated Credit Agreement dated as of February 10, 2014 (the “Credit Agreement”), pursuant to which the Lenders have agreed to make certain financial accommodations to the Borrowers;

WHEREAS, the Borrowers, the Lenders and Administrative Agent wish to amend the Credit Agreement in certain respects, all on the terms and conditions hereinafter set forth;

NOW, THEREFORE, in consideration of the foregoing and the mutual covenants herein contained, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties signatory hereto agree as follows:

1.Definitions.  Except as otherwise defined in this Fifth Amendment, terms defined in the Credit Agreement are used herein as defined therein.

2.Amendments to Credit Agreement.  Subject to the satisfaction of the conditions precedent specified in Section 3 below, the undersigned Lenders hereby agree that, effective as of December 31, 2015, the Credit Agreement shall be amended as follows:

(a)The definition of “Base Rate” in Section 1.01 of the Credit Agreement shall be amended and restated in its entirety to read as follows:

“Base Rate”  means for any day a fluctuating rate of interest per annum equal to the highest of (a) the Federal Funds Rate plus 0.50%, (b) the rate of interest in effect for such day as publicly announced from time to time by Bank of America as its “prime rate,” and (c) the Eurodollar Rate plus 1.00%, subject to the interest rate floors set forth therein; provided that if the Base Rate shall be less than zero, such rate shall be deemed zero for purposes of this Agreement.  The “prime rate” is a rate set by Bank of America based upon various factors including Bank of America’s costs and desired return, general economic conditions and other factors, and is used as a reference point for pricing some loans, which may be priced at, above, or below such announced rate.  Any change in such prime rate announced by Bank of America shall take effect at the opening of business on the day specified in the public announcement of such change.

(b)The definition of “Consolidated EBITDA” in Section 1.01 of the Credit Agreement shall be amended and restated so that the entire definition of Consolidated EBITDA reads as follows:

“Consolidated EBITDA” means, for any period, for Holdings and its Subsidiaries on a consolidated basis, an amount equal to Consolidated Net Income for any Measurement Period plus (a) the following to the extent deducted in calculating such Consolidated Net Income with respect to such period: (i) Consolidated Interest Charges and, to the extent not reflected in such Consolidated Interest Charges, (A) fees, expenses and charges incurred in respect of financing activities (including commissions, discounts and closing fees) during such period and (B) payments made in respect of Swap Contracts permitted hereunder entered into for the purpose of hedging interest rate or currency exchange rate risk during such period; (ii) the provision for federal, state, local and foreign income and other similar taxes for such period, including all taxes reported as “income taxes” on Holding’s consolidated financial statements for such period; (iii) depreciation and amortization expense for such period; (iv) unusual or non-recurring charges, including (x) restructuring charges from ongoing operations and divestitures in an amount not to exceed $10,000,000 in the aggregate during any Measurement Period, and (y) restructuring charges, fees, expenses and charges incurred in respect of acquisitions, equity issuances, indebtedness and investments (whether or not consummated), for which consent from Lenders is not otherwise required under the terms of this Agreement, in an amount not to exceed $7,500,000 in the aggregate during any Measurement Period; (v) Non-Cash Charges minus (b) without duplication and to the extent included in determining Consolidated Net Income for such period, (i) non-cash income or gains, all as determined in accordance with GAAP and (ii) earnings from equity method investments less the aggregate amount of cash actually distributed by such Person during such Measurement Period to Holdings or a Subsidiary as dividend or other distribution.

(c)The definition of “Consolidated Funded Indebtedness” in Section 1.01 of the Credit Agreement shall be amended by amending and restating the text in clause (d) thereof so that the entire definition of Consolidated Funded Indebtedness reads as follows:

“Consolidated Funded Indebtedness” means, as of any date of determination, for Holdings and its Subsidiaries on a consolidated basis, the sum of (a) the outstanding principal amount of all obligations, whether current or long-term, for borrowed money (including Obligations hereunder and any Permitted Subordinated Debt) and all obligations evidenced by bonds, debentures, notes, loan agreements or other similar instruments, (b) all Purchase Money Indebtedness, (c) all direct obligations arising under letters of credit (including standby and commercial), bankers’ acceptances, bank guaranties, surety bonds and similar instruments, (d) all obligations in respect of the deferred purchase price of property or services (other than trade accounts payable in the ordinary course of business and earn-outs or other similar forms of contingent purchase price; provided that, for the avoidance of doubt, any non-contingent seller debt shall be included in the calculation of Consolidated Funded Indebtedness), (e) all Attributable Indebtedness other than in respect of Capitalized Leases for real property (if capitalization of such leases arises under GAAP), (f) without duplication, all Guarantees with respect to outstanding Indebtedness of the types specified in clauses (a) through (e) above of Persons other than any Borrower or any Subsidiary, and (g) all Indebtedness of the types referred to in clauses (a) through (f) above of any partnership or joint venture (other than a joint venture that is itself a corporation or limited liability company) in which any Borrower or a Subsidiary is a general partner or joint venturer, unless such Indebtedness is expressly made non-recourse to such Borrower or such Subsidiary, in the cases of clauses (a), (b) and (d), to the extent any of such obligations would appear as a liability on the face of a balance sheet of Holdings prepared in accordance with GAAP.

(d)The definition of “Eurodollar Rate” in Section 1.01 of the Credit Agreement shall be amended and restated in its entirety to read as follows:

“Eurodollar Rate”  means:

2

(a)  for any Interest Period with respect to a Eurodollar Rate Loan, the rate per annum equal to the London Interbank Offered Rate (“LIBOR”) or, if LIBOR is not available, a comparable or successor rate which rate is approved by the Administrative Agent, as published on the applicable Bloomberg screen page (or such other commercially available source providing such quotations as may be designated by the Administrative Agent from time to time) at approximately 11:00 a.m., London time, two (2) Business Days prior to the commencement of such Interest Period, for Dollar deposits (for delivery on the first day of such Interest Period) with a term equivalent to such Interest Period; and

(b)  for any interest calculation with respect to a Base Rate Loan on any date, the rate per annum equal to LIBOR or, if LIBOR is not available, a comparable or successor rate, which rate is approved by the Administrative Agent, as published on the applicable Bloomberg screen page (or such other commercially available source providing such quotations as may be designated by the Administrative Agent from time to time) at or about 11:00 a.m., London time determined two (2) Business Days prior to such date for U.S. Dollar deposits with a term of one (1) month commencing that day; provided that:  (i) to the extent a comparable or successor rate is approved by the Administrative Agent in connection herewith, the approved rate shall be applied in a manner consistent with market practice, provided that to the extent such market practice is not administratively feasible for the Administrative Agent, such approved rate shall be applied in a manner as otherwise reasonably determined by the Administrative Agent; and (ii) if the Eurodollar Rate shall be less than zero, such rate shall be deemed zero for purposes of this Agreement.

(e)The definition of “Indebtedness” in Section 1.01 of the Credit Agreement shall be amended so that clause (d) thereof reads as follows:

(d)all obligations of such Person to pay the deferred purchase price of property or services (other than trade accounts payable in the ordinary course of business and earn-outs or other similar forms of contingent purchase price; provided that, for the avoidance of doubt, any non-contingent seller debt shall be considered Indebtedness);

(f)Exhibit D (Form of Compliance Certificate) and Exhibit N (Form of Permitted Acquisition Certificate) to the Credit Agreement are hereby amended by deleting such exhibits in their entirety and replacing them with the corresponding exhibits set forth in Annex I attached hereto.

(g)The schedules to the Credit Agreement are hereby amended by deleting such schedules in their entirety and replacing them with the corresponding schedules set forth in Annex II attached hereto.  

3.Conditions Precedent.  The amendments to the Credit Agreement set forth in Section 2 hereof shall become effective, as of December 31, 2015, upon satisfaction of the following conditions precedent:

(a)the Borrowers shall have delivered to the Administrative Agent a counterpart of this Fifth Amendment executed by the Borrowers and each other Loan Party;

(b)the Required Lenders and the Administrative Agent shall have indicated their consent and agreement by executing this Fifth Amendment;

(c)the Borrowers shall have paid all fees and other amounts due and payable by it under the Credit Agreement, including to the extent invoiced the reasonable fees, costs and expenses owing to Choate, Hall & Stewart LLP, and under the Fee Letter;

(d)the representations and warranties made by each Loan Party in Section 4 hereof are true and correct as of the date hereof; and

3

(e)no Event of Default shall have occurred and be continuing. 

4.Representations and Warranties.  

(a)The Borrowers and the other Loan Parties each represents and warrants to the Lenders that the representations and warranties of the Loan Parties contained in Article V of the Credit Agreement or any other Loan Document, or which are contained in any document furnished at any time under or in connection herewith or therewith, are true and correct in all material respects on the date hereof, other than any representation and warranty that is qualified as to “materiality,” “Material Adverse Effect” or similar language shall be true and correct in all respects on the date hereof; provided that (a) to the extent that such representations and warranties specifically refer to an earlier date, in which case they shall be true and correct in all material respects as of such earlier date, except to the extent already qualified by materiality, in which case they shall be true and correct in all respects after giving effect to such materiality qualifier, (b) the representations and warranties contained in Sections 5.05(a) and (b) of the Credit Agreement shall be deemed to refer to the most recent statements furnished pursuant to Sections 6.01(a) and (b) of the Credit Agreement, respectively and (c) each reference in the Credit Agreement to “this Agreement” or the “Credit Agreement” or the like shall include reference to this Fifth Amendment and the Credit Agreement as amended hereby.

(b)The execution, delivery and performance by each Loan Party of this Fifth Amendment has been duly authorized by all necessary corporate or other organizational action, and does not and will not (a) contravene the terms of any of such Person’s Organization Documents; (b) conflict with or result in any breach or contravention of, or the creation of any Lien under, or require any payment to be made under (i) any Contractual Obligation to which such Person is a party or affecting such Person or the properties of such Person or any of its Subsidiaries; except for conflicts or breaches which could not reasonably be expected to have a Material Adverse Effect or (ii) any order, injunction, writ or decree of any Governmental Authority or any arbitral award to which such Person or its property is subject; or (c) violate any Law.

(c)No approval, consent, exemption, authorization, or other action by, or notice to, or filing with, any Governmental Authority or any other Person is necessary or required in connection with (a) the execution, delivery or performance by, or enforcement against, any Loan Party of this Fifth Amendment or any other Loan Document, or for the consummation of the Transaction, (b) the grant by any Loan Party of the Liens granted by it pursuant to the Collateral Documents, (c) the perfection or maintenance of the Liens created under the Collateral Documents (including the first priority nature thereof) or (d) the exercise by the Administrative Agent or any Lender of its rights under the Loan Documents or the remedies in respect of the Collateral pursuant to the Collateral Documents, except for (i) those which have been duly obtained, taken, given or made and are in full force and effect, (ii) those required under agreements that a Loan Party is permitted to execute pursuant to this Fifth Amendment, (iii) those required by applicable law or regulation, and (iv) those the failure of which to be obtained would not reasonably be expected to have a Material Adverse Effect.  

(d)This Fifth Amendment has been, and each other Loan Document, when delivered hereunder and under the Credit Agreement, will have been, duly executed and delivered by each Loan Party that is party thereto.  This Fifth Amendment constitutes, and each other Loan Document when so delivered will constitute, a legal, valid and binding obligation of such Loan Party, enforceable against each Loan Party that is party thereto in accordance with its terms, except as may be limited by Debtor Relief Laws or by general principals of equity.

5.Effect on Loan Documents.  The Credit Agreement (as amended hereby), including the Continuing Guaranty set forth in Article X thereof, and the other Loan Documents shall be and remain in full force and effect in accordance with their terms and hereby are ratified and confirmed in all respects by the Borrowers and the Guarantors.  Except as expressly set forth herein the execution, delivery, and performance of this Fifth Amendment shall not operate as a waiver or an amendment of any right, power, or remedy of the Administrative Agent or any Lender under the Credit Agreement or any other Loan Document, as in effect prior to the date hereof.  Each of the Loan Parties hereby ratifies and confirms in all respects all of its obligations under the Credit Agreement (as amended hereby) and the other Loan Documents to which it is a party.  

4

6.No Novation; Entire Agreement.  This FifthAmendment evidences solely the amendment of the terms and provisions of the obligations of the Borrowers and the other Loan Parties under the Loan Documents and is not a novation or discharge thereof.  There are no other understandings, express or implied, among the Borrowers, the other Loan Parties, the Administrative Agent and the Lenders regarding the subject matter hereof or thereof. 

7.Choice of Law.  This Fifth Amendment shall be governed by, and construed in accordance with, the laws of the State of New York.

8.Counterparts; Facsimile Execution.  This Fifth Amendment may be executed in any number of counterparts and by different parties and separate counterparts, each of which when so executed and delivered shall be deemed an original, and all of which, when taken together, shall constitute one and the same instrument.  Delivery of an executed counterpart of a signature page to this Fifth Amendment by facsimile shall be as effective as delivery of a manually executed counterpart of this Fifth Amendment.  

9.Construction.  This Fifth Amendment is a Loan Document.  This Fifth Amendment and the Credit Agreement shall be construed collectively and in the event that any term, provision or condition of any of such documents is inconsistent with or contradictory to any term, provision or condition of any other such document, the terms, provisions and conditions of this Fifth Amendment shall supersede and control the terms, provisions and conditions of the Credit Agreement.  Upon and after the effectiveness of this Fifth Amendment, each reference in the Credit Agreement to “this Agreement”, “hereunder”, “herein”, “hereof” or words of like import referring to the Credit Agreement, and each reference in the other Loan Documents to “the Credit Agreement”, “thereunder”, “therein”, “thereof” or words of like import referring to the Credit Agreement, shall mean and be a reference to the Credit Agreement as modified and amended hereby.

[Remainder of Page Intentionally Left Blank]

5

IN WITNESS WHEREOF, the parties hereto have caused this FifthAmendment to be executed as of the date first above written.

LEAD BORROWER:

GSI GROUP CORPORATION

By:  /s/ Robert J. Buckley

Name:  Robert Buckley

Title:   Chief Financial Officer

BORROWER:

NDS SURGICAL IMAGING, LLC

By:  /s/ Robert J. Buckley

Name:  Robert Buckley

Title:   President

HOLDINGS:

GSI GROUP INC.

By:  /s/ Robert J. Buckley

Name:  Robert Buckley

Title:   Chief Financial Officer

GUARANTORS:

EXCEL TECHNOLOGY, INC.

By:  /s/ Robert J. Buckley

Name:  Robert Buckley

Title:    Secretary

GSI GROUP LIMITED

By:  /s/ Robert J. Buckley

Name:  Robert Buckley

Title:   Director

JADAK, LLC

By:  /s/ Robert J. Buckley

Name:  Robert Buckley

Title:   Vice President

GSI GROUP UK INVESTMENTS HOLDING LIMITED

[Fifth Amendment to Credit Agreement]

By:  /s/ Robert J. Buckley 

Name:  Robert Buckley

Title:   Director

[Fifth Amendment to Credit Agreement]

bank of america, n.a., as
Administrative Agent

By:  /s/ Angela Larkin

Name:  Angela Larkin

Title:    Assistant Vice President

[Fifth Amendment to Credit Agreement]

bank of america, n.a., as a Lender, L/C Issuer and Swing Line Lender

By:  /s/ Luanne T. Smith

Name:  Luanne T. Smith

Title:   Vice President

[Fifth Amendment to Credit Agreement]

SILICON VALLEY BANK

By:  /s/ Michael Shuhy

Name:  Michael Shuhy

Title:    Vice President

[Fifth Amendment to Credit Agreement]

HSBC BANK USA N.A.

By:  /s/ Dan Lobdell  

Name:  Dan Lobdell

Title:    Vice President

[Fifth Amendment to Credit Agreement]

TD BANK, N.A.

By:  /s/ Meredith E. Christensen

Name:  Meredith E. Christensen

Title:    Vice President

[Fifth Amendment to Credit Agreement]

JPMORGAN CHASE BANK, N.A.

By:  /s/ Peter M. Killea

Name:  Peter M. Killea

Title:  Senior Vice President

[Fifth Amendment to Credit Agreement]

BROWN BROTHERS HARRIMAN & CO.

By:  /s/ Jed Hall

Name:  Jed Hall

Title:    Managing Director

EX-21.1

Exhibit 21.1

GSI GROUP INC. SUBSIDIARIES

Subsidiary	Place of Incorporation
GSI Group Corporation	Michigan
GSI Group Japan Corporation	Japan
GSI Group Singapore Pte. Ltd.	Singapore
GSI Group GmbH	Germany
GSI Group Limited	United Kingdom
GSI Group UK Investments Holding Limited	United Kingdom
GSI Group Precision Technologies (Suzhou) Co., Ltd.	China
GSI Lumonics Asia Pacific Ltd.	Hong Kong
Excel Technology, Inc.	Delaware
Excel Technology (Lanka) Pvt. Ltd.	Sri Lanka
Excel Technology Asia Sdn. Bhd.	Malaysia
GSI Group Europe GmbH	Germany
GSI Applications Development Pvt. Ltd.	Sri Lanka
GSI Group Italy SRL	Italy
NDS Surgical Imaging, LLC	Delaware
NDS Holdings, BV	Netherlands
NDS Surgical Imaging BV	Netherlands
JADAK LLC	New York
JADAK Europe BV	Netherlands

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-202597, 333-180098 and 333-154157) and Form S-8 (No. 333-43080, 333-76849, 333-73666, 333-118320, 333-171260, 333-194557 and 333-202598) of GSI Group Inc. of our report dated March 2, 2016 relating to the consolidated financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts

March 2, 2016

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

CERTIFICATION

I, John A. Roush, certify that:

1. I have reviewed this annual report on Form 10-K of GSI Group Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

March 2, 2016

/s/ John A. Roush

John A. Roush

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

CERTIFICATION

I, Robert J. Buckley, certify that:

1. I have reviewed this annual report on Form 10-K of GSI Group Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

March 2, 2016

/s/ Robert J. Buckley

Robert J. Buckley

Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of GSI Group Inc. (the “Company”) on Form 10-K for the period ended December 31, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, John A. Roush, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1) the Report fully complies with the requirements of section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ John A. Roush

John A. Roush

Chief Executive Officer

March 2, 2016

This Certification shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section, or incorporated by reference into any of the Company’s filings with the Securities and Exchange Commission by implication or by any reference in any such filings to the Report.

A signed original of this written statement required by Section 906 has been provided to GSI Group Inc. and will be retained by GSI Group Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of GSI Group Inc. (the “Company”) on Form 10-K for the period ended December 31, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Robert J. Buckley, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1) the Report fully complies with the requirements of section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Robert J. Buckley

Robert J. Buckley

Chief Financial Officer

March 2, 2016

This Certification shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section, or incorporated by reference into any of the Company’s filings with the Securities and Exchange Commission by implication or by any reference in any such filings to the Report.

A signed original of this written statement required by Section 906 has been provided to GSI Group Inc. and will be retained by GSI Group Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

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Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 26, 2016	Jul. 03, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Trading Symbol	GSIG
Entity Registrant Name	GSI GROUP INC
Entity Central Index Key	0001076930
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		34,346,589
Entity Public Float			$ 430,444,038

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current Assets
Cash and cash equivalents	$ 59,959	$ 51,146
Accounts receivable, net of allowance of $500 and $282, respectively	57,188	51,494
Inventories	59,566	62,943
Income taxes receivable	2,510	5,906
Deferred tax assets		5,971
Prepaid expenses and other current assets	5,989	5,081
Assets of discontinued operations	0	631
Total current assets	185,212	183,172
Property, plant and equipment, net	40,550	40,088
Deferred tax assets	7,885	2,912
Other assets	12,673	12,134
Intangible assets, net	66,269	67,242
Goodwill	103,456	90,746
Total assets	416,045	396,294
Current Liabilities
Current portion of long-term debt	7,385	7,345
Accounts payable	24,401	25,592
Income taxes payable	3,985	1,189
Deferred tax liabilities		208
Accrued expenses and other current liabilities	21,182	19,401
Liabilities of discontinued operations	0	324
Total current liabilities	56,953	54,059
Long-term debt	88,426	105,030
Deferred tax liabilities	449	35
Income taxes payable	6,071	7,097
Other liabilities	19,445	18,819
Total liabilities	$ 171,344	$ 185,040
Commitments and Contingencies (Note 15)
Stockholders’ Equity:
Common shares, no par value; Authorized shares: unlimited; Issued and outstanding: 34,345 and 34,219, respectively	$ 423,856	$ 423,856
Additional paid-in capital	29,225	28,590
Accumulated deficit	(189,550)	(225,165)
Accumulated other comprehensive loss	(18,830)	(16,456)
Total GSI Group Inc. stockholders’ equity	244,701	210,825
Noncontrolling interest		429
Total stockholders’ equity	244,701	211,254
Total liabilities and stockholders’ equity	$ 416,045	$ 396,294

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement Of Financial Position [Abstract]
Accounts receivable, allowance	$ 500	$ 282
Common shares, no par value	$ 0	$ 0
Common shares, Issued	34,345	34,219
Common shares, outstanding	34,345	34,219

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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Revenue	$ 373,598	$ 364,706	$ 316,910
Cost of revenue	215,708	214,539	184,683
Gross profit	157,890	150,167	132,227
Operating expenses:
Research and development and engineering	31,043	28,954	23,787
Selling, general and administrative	82,049	84,380	76,337
Amortization of purchased intangible assets	7,611	10,262	7,270
Restructuring, acquisition and divestiture related costs	8,254	1,935	5,387
Impairment of goodwill and intangible assets		41,442
Total operating expenses	128,957	166,973	112,781
Operating income (loss) from continuing operations	28,933	(16,806)	19,446
Interest income (expense), net	(5,180)	(5,096)	(3,468)
Foreign exchange transaction gains (losses), net	(23)	1,281	(1,301)
Other income (expense), net	2,663	2,706	1,500
Gain on disposal of business	19,629
Income (loss) from continuing operations before income taxes	46,022	(17,915)	16,177
Income tax provision (benefit)	10,394	(1,006)	6,200
Income (loss) from continuing operations	35,628	(16,909)	9,977
Loss from discontinued operations, net of tax	(13)	(5,607)	(2,054)
Loss on disposal of discontinued operations, net of tax		(1,726)	(592)
Consolidated net income (loss)	35,615	(24,242)	7,331
Less: Net income attributable to noncontrolling interest		(10)	(22)
Net income (loss) attributable to GSI Group Inc.	$ 35,615	$ (24,252)	$ 7,309
Earnings (loss) per common share from continuing operations:
Basic	$ 1.03	$ (0.49)	$ 0.29
Diluted	1.02	(0.49)	0.29
Loss per common share from discontinued operations:
Basic	0.00	(0.21)	(0.08)
Diluted	0.00	(0.21)	(0.08)
Earnings (loss) per common share attributable to GSI Group Inc.:
Basic	1.03	(0.70)	0.21
Diluted	$ 1.02	$ (0.70)	$ 0.21
Weighted average common shares outstanding—basic	34,579	34,352	34,073
Weighted average common shares outstanding—diluted	34,827	34,352	34,396
Amounts attributable to GSI Group Inc.:
Income (loss) from continuing operations	$ 35,628	$ (16,909)	$ 9,977
Loss from discontinued operations	(13)	(7,343)	(2,668)
Net income (loss) attributable to GSI Group Inc.	$ 35,615	$ (24,252)	$ 7,309

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Consolidated net income (loss)		$ 35,615	$ (24,242)	$ 7,331
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	[1]	(4,083)	(6,968)	54
Pension liability adjustments, net of tax	[2]	1,709	(3,146)	3,353
Total other comprehensive income (loss)		(2,374)	(10,114)	3,407
Total consolidated comprehensive income (loss)		33,241	(34,356)	10,738
Less: Comprehensive income attributable to noncontrolling interest			(10)	(22)
Comprehensive income (loss) attributable to GSI Group Inc.		$ 33,241	$ (34,366)	$ 10,716

[1] The tax effect on this component of comprehensive income was $193, $622 and $477 in 2015, 2014 and 2013, respectively.

[2] The tax effect on this component of comprehensive income was $307, ($906) and $900 in 2015, 2014 and 2013, respectively.

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Foreign currency translation adjustments - Tax effect on component of comprehensive income	$ 193	$ 622	$ 477
Pension liability adjustments, tax effect on the component of comprehensive income	$ 307	$ (906)	$ 900

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Capital Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)	Noncontrolling Interest
Balance at Dec. 31, 2012	$ 228,206	$ 423,856	$ 21,924	$ (9,749)	$ (208,222)	$ 397
Balance (in shares) at Dec. 31, 2012		33,796
Consolidated net income (loss)	7,331				7,309	22
Issuance of common stock upon vesting of non-vested stock awards (in shares)		395
Repurchase of common stock	(526)		(526)
Repurchase of common stock (in shares)		(50)
Share-based compensation	5,624		5,624
Net settlement of vested stock awards	(1,495)		(1,495)
Net settlement of vested stock awards (in shares)		(150)
Tax benefit (shortfalls) of vested stock awards	(144)		(144)
Other comprehensive income (loss), net of tax	3,407			3,407
Balance at Dec. 31, 2013	242,403	$ 423,856	25,383	(6,342)	(200,913)	419
Balance (in shares) at Dec. 31, 2013		33,991
Consolidated net income (loss)	(24,242)				(24,252)	10
Issuance of common stock upon vesting of non-vested stock awards (in shares)		362
Share-based compensation	4,659		4,659
Net settlement of vested stock awards	(1,666)		(1,666)
Net settlement of vested stock awards (in shares)		(134)
Tax benefit (shortfalls) of vested stock awards	214		214
Other comprehensive income (loss), net of tax	(10,114)			(10,114)
Balance at Dec. 31, 2014	211,254	$ 423,856	28,590	(16,456)	(225,165)	429
Balance (in shares) at Dec. 31, 2014		34,219
Consolidated net income (loss)	35,615				35,615
Issuance of common stock upon vesting of non-vested stock awards (in shares)		398
Repurchase of common stock	(1,627)		(1,627)
Repurchase of common stock (in shares)		(122)
Share-based compensation	4,065		4,065
Net settlement of vested stock awards	(1,941)		(1,941)
Net settlement of vested stock awards (in shares)		(150)
Tax benefit (shortfalls) of vested stock awards	138		138
Other comprehensive income (loss), net of tax	(2,374)			(2,374)
Balance at Dec. 31, 2015	244,701	$ 423,856	$ 29,225	$ (18,830)	$ (189,550)
Balance (in shares) at Dec. 31, 2015		34,345
Dissolution of minority interest	$ (429)					$ (429)

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Consolidated net income (loss)	$ 35,615	$ (24,242)	$ 7,331
Less: Loss from discontinued operations, net of tax	13	7,333	2,646
Income (loss) from continuing operations	35,628	(16,909)	9,977
Adjustments to reconcile income (loss) from continuing operations to net cash provided by operating activities of continuing operations:
Depreciation and amortization	19,114	23,797	19,570
Provision for inventory excess and obsolescence	1,934	832	1,582
Impairment of goodwill and intangible assets		41,442
Share-based compensation	4,387	4,329	5,442
Deferred income taxes	(1,692)	(6,736)	3,886
Earnings from equity-method investment	(2,657)	(2,700)	(1,469)
Gain on disposal of business	(19,629)
Contingent consideration adjustment	430
Non-cash interest expense	935	1,379	965
Other non-cash items	1,408	1,586	1,230
Changes in assets and liabilities which provided (used) cash, excluding effects from businesses purchased or classified as held for sale:
Accounts receivable	(7,526)	3,526	(1,826)
Inventories	(3,338)	(991)	(1,688)
Prepaid expenses and other current assets	902	(527)	854
Income taxes receivable	3,431	(206)	10,848
Accounts payable, income taxes payable, accrued expenses and other current liabilities	2,167	(4,698)	5,958
Other non-current assets and liabilities	(2,065)	(134)	849
Cash provided by operating activities of continuing operations	33,429	43,990	56,178
Cash used in operating activities of discontinued operations	(13)	(1,701)	(6,978)
Cash provided by operating activities	33,416	42,289	49,200
Cash flows from investing activities:
Purchases of property, plant and equipment	(5,552)	(5,415)	(4,777)
Acquisition of businesses, net of cash acquired and escrow recovery	(25,987)	(88,238)	(80,773)
Proceeds from the sale of business, net of transaction costs	29,570
Proceeds from the sale of property, plant and equipment	127	112	253
Cash used in investing activities of continuing operations	(1,842)	(93,541)	(85,297)
Cash provided by investing activities of discontinued operations	209	3,768	12,341
Cash used in investing activities	(1,633)	(89,773)	(72,956)
Cash flows from financing activities:
Borrowings under revolving credit facility	13,000	77,000	60,000
Repayments of long-term debt and revolving credit facility	(30,500)	(33,500)	(38,500)
Payments for debt issuance costs		(712)	(145)
Payments of withholding taxes from stock-based awards	(1,941)	(1,666)	(1,495)
Repurchase of common stock	(1,627)		(526)
Other financing activities	(467)	(841)	(760)
Cash provided by (used in) financing activities of continuing operations	(21,535)	40,281	18,574
Cash provided by (used in) financing activities of discontinued operations	0	0	0
Cash provided by (used in ) financing activities	(21,535)	40,281	18,574
Effect of exchange rates on cash and cash equivalents	(1,435)	(2,631)	374
Increase (decrease) in cash and cash equivalents	8,813	(9,834)	(4,808)
Cash and cash equivalents, beginning of year	51,146	60,980	65,788
Cash and cash equivalents, end of year	59,959	51,146	60,980
Supplemental disclosure of cash flow information:
Cash paid for interest	3,784	3,793	2,291
Cash paid for income taxes	10,688	6,087	2,197
Income tax refunds received	3,939	931	12,607
Supplemental disclosure of non-cash investing activity:
Accrual for capital expenditures	1,180	26	184
Supplemental disclosure of non-cash financing activity:
Assets acquired under capital lease obligation	$ 0	$ 10,438	$ 0

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Organization and Presentation

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Organization and Presentation

1. Organization and Presentation

GSI Group Inc. and its subsidiaries (collectively referred to as the “Company”, “we”, “us”, “our”) design, develop, manufacture and sell precision photonic and motion control components and subsystems to Original Equipment Manufacturers (“OEM’s”) in the medical and advanced industrial markets. Our highly engineered enabling technologies include CO2 laser sources, laser scanning and beam delivery products, optical data collection and machine vision technologies, medical visualization and informatics solutions, and precision motion control products. We specialize in collaborating with OEM customers to adapt our component and subsystem technologies to deliver highly differentiated performance in their applications.

Basis of Presentation

These consolidated financial statements have been prepared by the Company in U.S. dollars and in accordance with U.S. generally accepted accounting principles, applied on a consistent basis.

The consolidated financial statements include the accounts of GSI Group Inc. and its wholly owned subsidiaries. Intercompany accounts and transactions have been eliminated. In 2015, the Company’s 50% owned joint venture, Excel Laser Technology Private Limited (the “India JV”), was deconsolidated as the Company sold 100% of its interest in the India JV. The accounts of the India JV were previously included in discontinued operations in the consolidated financial statements.  

The Company has a 41% ownership interest in Laser Quantum Ltd. (“Laser Quantum”), a privately held company located in the United Kingdom. The Company records the results of this entity under the equity method as it does not have a controlling interest in the entity.

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Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the dates of the financial statements, and the reported amounts of revenue and expenses during the reporting periods. The Company evaluates its estimates based on historical experience, current conditions and various other assumptions that it believes are reasonable under the circumstances. Estimates and assumptions are reviewed on an on-going basis and the effects of revisions are reflected in the period in which they are deemed to be necessary. Actual results could differ significantly from those estimates.

Foreign Currency Translation

The financial statements of the Company and its subsidiaries outside the United States have been translated into U.S. dollars. Assets and liabilities of foreign operations are translated from foreign currencies into U.S. dollars at the exchange rates in effect on the balance sheet date. Revenue and expenses are translated at the average exchange rate in effect for the period. Accordingly, gains and losses resulting from translating foreign currency financial statements are reported as cumulative translation adjustment, a separate component of other comprehensive income (loss) in stockholders’ equity. Foreign currency transaction gains and losses, primarily from transactions denominated in currencies other than the functional currency, are included in the accompanying consolidated statements of operations.

Cash and Cash Equivalents

Cash equivalents, primarily money market accounts, are highly liquid investments with original maturities of three months or less. These investments are carried at cost, which approximates fair value.

Long-Term Investments

At December 31, 2015 and 2014, the Company had a 41% equity investment in Laser Quantum, a privately held company located in the United Kingdom. During the second quarter of 2013, the Company’s ownership percentage increased from 25% to 41% as a result of a stock buyback program by Laser Quantum. The Company continues to use the equity method to record the results of this entity as it does not have a controlling interest in the entity. The Company recognized investment income of $2.7 million, $2.7 million and $1.5 million during 2015, 2014 and 2013, respectively, which is included in other income (expense) in the accompanying consolidated statements of operations. The Company’s net investment in Laser Quantum was $10.1 million and $8.0 million at December 31, 2015 and 2014, respectively, and is included in other long-term assets in the accompanying consolidated balance sheets.

The summarized financial information for Laser Quantum is as follows (in thousands):

	Year Ended December 31,
	2015		2014		2013
Revenue	$	25,599	$	23,013	$	16,269
Income from operations	$	7,362	$	7,434	$	4,720
Net income	$	6,925	$	6,627	$	3,745

	December 31,
	2015		2014
Total assets (1)	$	30,159	$	25,423
Total liabilities	$	2,552	$	2,482

(1) Total assets at December 31, 2015 and 2014 included cash and cash equivalent of $21.0 million and $17.1 million, respectively.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable are recorded at the invoiced amount. The Company maintains an allowance for doubtful accounts based on the Company’s best estimate of probable credit losses resulting from the inability of the Company’s customers to make required payments. The Company determines the allowance based on a variety of factors, including the age of amounts outstanding relative to their contractual due date, specific customer factors, and other known risks and economic trends. Charges related to the allowance for doubtful accounts are included as selling, general and administrative expenses and are recorded in the period that the outstanding receivables are determined to be uncollectible. Account balances are charged off against the allowance when the Company believes it is probable that the receivable will not be recovered.

For the years ended December 31, 2015, 2014 and 2013, changes in the allowance for doubtful accounts were as follows (in thousands):

	2015			2014			2013
Balance at beginning of year	$	282		$	575		$	294
Provision charged to selling, general and administrative expenses		285			30			301
Allowance resulting from acquisitions		5			52			117
Write-offs, net of recoveries of amounts previously reserved		(29	)		(352	)		(159	)
Divestiture of JK Lasers		(30	)		—			—
Exchange rate changes		(13	)		(23	)		22
Balance at end of year	$	500		$	282		$	575

Inventories

Inventories, which include materials and conversion costs, are stated at the lower of cost or market, using the first-in, first-out method. Market is defined as replacement cost for raw materials and net realizable value for other inventories. Demo inventory is recorded at the lower of cost or its net realizable value. The Company periodically reviews quantities of inventories on hand and compares these amounts to the expected use of each product. The Company records a charge to cost of revenue for the amount required to reduce the carrying value of inventory to net realizable value. Costs associated with the procurement of inventories such as inbound freight charges, purchasing and receiving costs are capitalized in inventory on the consolidated balance sheets.

Property, Plant and Equipment

Property, plant and equipment are recorded at cost, adjusted for any impairment, less accumulated depreciation. The Company uses the straight-line method to calculate the depreciation of its fixed assets over their estimated useful lives. Estimated useful lives range from 3 to 30 years for buildings and building improvements and 1 to 10 years for machinery and equipment. Leasehold improvements are depreciated over the lesser of their useful lives or lease terms, including any renewal period options that are reasonably assured of being exercised. Repairs and maintenance costs are expensed as incurred. Certain costs to develop software for internal use are capitalized when the criteria under Accounting Standards Codification (“ASC”) 350-40, “Internal-Use Software,” are met. Lease arrangements meeting the criteria of ASC 840-30, “Leases – Capital Leases,” are capitalized based on the present value of future lease payments and depreciated over the term of the lease.

Goodwill, Intangibles and Long-Lived Assets

Goodwill represents the excess of the purchase price over the tangible assets, identifiable intangible assets and assumed liabilities acquired in a business combination. Allocations of the purchase price are based upon a valuation of assets and liabilities acquired. Assets acquired and liabilities assumed are recorded at their estimated fair values as of the acquisition date. The fair values of intangible assets are based on valuations using an income approach, with estimates and assumptions provided by management of the acquired companies and the Company. Goodwill and indefinite-lived intangibles are not amortized but are assessed for impairment at least annually to ensure their current fair values exceed their carrying values.

The Company’s most significant intangible assets are patents and acquired technologies, customer relationships, trademarks and trade names. All definite-lived intangible assets are amortized over the periods in which their economic benefits are expected to be realized. The Company reviews the useful life assumptions, including the classification of certain intangible assets as “indefinite-lived”, on a periodic basis to determine if changes in circumstances warrant revisions to them.

The Company’s product lines generally correspond with its reporting units which is the level at which the Company evaluates its goodwill, intangible assets and other long-lived assets for impairment.

Impairment Charges

Impairment analyses of goodwill and indefinite-lived intangible assets are conducted in accordance with ASC 350, “Intangibles—Goodwill and Other”. This guidance specifies that goodwill and other intangible assets must be periodically tested for impairment. The Company tests its goodwill balances annually as of the beginning of the second quarter or more frequently if indicators are present or changes in circumstances suggest that an impairment may exist. The Company utilizes a quantitative analysis to test goodwill for impairment. This two-step approach requires a comparison of the carrying value of each of the Company’s reporting units to the fair value of these reporting units. The fair value of a reporting unit is primarily based on a discounted cash flow (“DCF”) method with a weighted average cost of capital. If the carrying value of a reporting unit exceeds its fair value, the Company calculates the implied fair value of the reporting unit’s goodwill and compares it to the goodwill’s carrying value. If the carrying value of the goodwill exceeds its implied fair value, an impairment charge is recorded for the difference.

The Company assesses indefinite-lived intangible assets for impairment on an annual basis as of the beginning of the second quarter, and more frequently if indicators are present or changes in circumstances suggest that an impairment may exist. The Company will also reassess the continuing classification of these indefinite-lived intangible assets as indefinite-lived when circumstances change such that the useful life may no longer be indefinite. The fair values of the Company’s indefinite-lived intangible assets are determined using the relief from royalty method, based on forecasted revenues. If the fair value of an indefinite-lived intangible asset is less than its carrying value, an impairment charge is recorded for the difference between the carrying value and the fair value of the impaired asset.

The carrying amounts of definite-lived long-lived assets are reviewed for impairment whenever changes in events or circumstances indicate that their carrying values may not be recoverable. The recoverability of carrying value is generally determined by comparison of the asset group’s carrying value to its undiscounted future cash flows. When this test indicates the potential for impairment, a fair value assessment is performed. Once an impairment is determined and measured, an impairment charge is recorded for the difference between the carrying value and the fair value of the impaired asset.

Revenue Recognition

The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred, price is fixed or determinable, and collection of the resulting receivable is reasonably assured. Revenue recognition requires judgment and estimates, which may affect the amount and timing of revenue recognized in any given period.

The Company’s revenue transactions are comprised of both single-element and multiple-element transactions. Multiple-element transactions may include two or more products and occasionally non-standard/extended warranties, or preventative maintenance plans. For multiple-element transactions, revenue is generally recognized upon shipment, using the relative selling price method in accordance with ASC 605-25 “Revenue – Multiple-Element Arrangements”. Single-element transactions are typically recognized upon shipment at their contractually stated prices.

The Company generally provides warranties for its products. The standard warranty period is typically 12 months to 24 months for the Laser Products and Precision Motion segments and 12 months to 36 months for the Vision Technologies segment. The standard warranty period for product sales is accounted for under the provisions of ASC 450 “Contingencies,” as the Company has the ability to ascertain the likelihood of the liability, and can estimate the amount of the liability. A provision for the estimated cost related to warranty is recorded to cost of revenue at the time revenue is recognized. The Company’s estimate of costs to service the warranty obligations is based on historical experience and expectations of future conditions. To the extent the Company experiences warranty claims or costs associated with servicing those claims that differ from the original estimates, revisions to the estimated warranty liability are recorded at that time.

The Company occasionally sells optional non-standard/extended warranty services and preventative maintenance contracts to customers. The Company accounts for these agreements in accordance with provisions of ASC 605-20-25-3, “Separately Priced Extended Warranty and Product Maintenance Contracts,” under which it recognizes the separately priced extended warranty and preventative maintenance fees ratably over the associated period.

The Company, at the request of its customers, may perform professional services, generally for the maintenance and repair of products previously sold to those customers. These services are usually in the form of time and materials based contracts which are short in duration. Revenue for time and materials services is recorded at the completion of services requested under a customer’s purchase order.

Research and Development and Engineering Costs

Research and development and engineering (“R&D”) expenses are primarily comprised of employee related expenses and cost of materials for R&D projects. These costs are expensed as incurred.

Share-Based Compensation

The Company records the expense associated with share-based compensation awards to employees and directors based on the fair value of awards as of the grant date. For stock-based compensation awards that vest over time based on employment, the associated expenses are recognized in the consolidated statements of operations ratably over the vesting period of the award, net of estimated forfeitures. For performance-based restricted stock units, stock-based compensation expenses are recognized ratably over the vesting period when it is probable that the performance targets are expected to be achieved based on management’s projections. Management’s projections are revised, if necessary, in subsequent periods when underlying factors change the evaluation of the probability of achieving the performance targets. Accordingly, share-based compensation expense associated with performance-based restricted stock units may differ significantly from period to period based on changes to the probability of achieving performance targets.

Shipping & Handling Costs

Shipping and handling costs are recorded in cost of revenue.

Advertising Costs

Advertising costs are expensed to selling, general and administrative expenses as incurred and were not material for 2015, 2014 and 2013.

Restructuring, Acquisition and Divestiture Related Costs

The Company accounted for its restructuring activities in accordance with the provisions of ASC 420, “Exit or Disposal Cost Obligations.” The Company makes assumptions related to the amounts of employee severance benefits and related costs, the time period over which facilities will remain vacant, useful lives and residual value of long-lived assets, sublease terms, sublease rates and discount rates. Estimates and assumptions are based on the best information available at the time the obligation is recognized. These estimates are reviewed and revised as facts and circumstances dictate.

Acquisition related costs incurred to effect a business combination, including finders’ fees, legal, valuation and other professional or consulting fees, are expensed as incurred. Acquisition related costs also include expenses recognized under earn-out agreements in connection with acquisitions. Expenses associated with divestiture activities, including legal and professional fees directly related to the completion of a business divestiture, are expensed as incurred.

Accounting for Income Taxes

The asset and liability method is used to account for income taxes. Under the asset and liability method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to temporary differences between the financial statement carrying amounts of assets and liabilities and their respective tax bases. This method also requires the recognition of future tax benefits, such as net operating loss carryforwards, to the extent that it is more likely than not that such benefits will be realized. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which the temporary differences are expected to be recovered or settled. A valuation allowance is established to reduce the deferred tax assets if it is more likely than not that some or all of the related tax benefits will not be realized in the future and is reassessed periodically to determine whether it is more likely than not that the tax benefits will be realized in the future and that such valuation should be released.

The majority of the Company’s business activities are conducted through its subsidiaries outside of Canada. Earnings from these subsidiaries are generally indefinitely reinvested in the local businesses. Further, local laws and regulations may also restrict certain subsidiaries from paying dividends to their parents. As such, the Company generally does not accrue income taxes for the repatriation of such earnings in accordance with ASC 740, “Income Taxes.” To the extent that there are excess accumulated earnings that the Company intends to repatriate from any such subsidiaries, the Company recognizes deferred tax liabilities on such foreign earnings.

The Company assesses its income tax positions and records tax benefits for all years subject to examination based on the evaluation of the facts, circumstances, and information available at each reporting date. For those tax positions with a greater than 50 percent likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information, the Company records a tax benefit. For those income tax positions that are not likely to be sustained, no tax benefit is recognized in the consolidated financial statements. The Company recognizes interest and penalties related to uncertain tax positions as part of the provision for income taxes.

Recent Accounting Pronouncements

Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity

In April 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity.” ASU 2014-08 provides guidance on determining when disposals can be presented as discontinued operations. ASU 2014-08 requires that only disposals representing a strategic shift that has (or will have) a major effect on an entity’s operations and financial results should be presented as discontinued operations. A strategic shift may include a disposal of a major line of business, a major equity method investment or a major part of an entity. Additionally, ASU 2014-08 requires expanded disclosures regarding discontinued operations. ASU 2014-08 is effective prospectively for reporting periods beginning after December 15, 2014. The Company adopted this pronouncement in January 2015.

Simplifying the Presentation of Debt Issuance Costs

In April 2015, the FASB issued ASU 2015-03, “Simplifying the Presentation of Debt Issuance Costs.” ASU 2015-03 requires debt issuance related costs to be presented in the balance sheet as a direct reduction to the carrying amount of the associated debt liability, consistent with the presentation of a debt discount. The Company adopted the provisions of ASU 2015-03 retrospectively as of the fiscal quarter ended October 2, 2015. Prior period amounts have been reclassified to conform to the current period presentation. As of December 31, 2014, $0.2 million of debt issuance costs were reclassified from prepaid expenses and other current assets to current portion of long-term debt and $2.5 million was reclassified from other long-term assets to long-term debt in the consolidated balance sheet. Other than these reclassifications, the adoption of ASU 2015-03 did not have an impact on the Company’s consolidated financial statements.

Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement

In April 2015, the FASB issued ASU 2015-05, “Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement,” which provides guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. ASU 2015-05 will be effective for annual and interim reporting periods beginning after December 15, 2015, with early adoption permitted. Upon adoption, an entity may apply the new guidance either retrospectively or prospectively to all arrangements entered into or materially modified after the effective date. The Company does not expect the adoption of ASU 2015-05 to have a material impact on the Company’s consolidated financial statements.

Business Combinations

In September 2015, the FASB issued ASU 2015-16, “Business Combinations,” which requires an acquirer to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 requires an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment had been recognized at the acquisition date. ASU 2015-16 will be effective prospectively for reporting periods beginning after December 15, 2015. The Company does not expect the adoption of ASU 2015-06 to have a material impact on the Company’s consolidated financial statements.

Balance Sheet Classification of Deferred Taxes

In November 2015, the FASB issued ASU 2015-17, “Income Taxes – Balance Sheet Classification of Deferred Taxes,” which simplifies the presentation of deferred income taxes. Under the new standard, both deferred tax assets and liabilities are required to be classified as noncurrent in a classified balance sheet. ASU 2015-17 will become effective for annual and interim reporting periods beginning after December 15, 2016, with early adoption allowed. The Company elected to early adopt the provisions of ASU 2015-17 using the prospective method and reported both current and noncurrent deferred tax assets and liabilities as noncurrent on the accompanying consolidated balance sheet as of December 31, 2015. The prior year balances were not retrospectively adjusted.

Leases

In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842),” which provides comprehensive lease accounting guidance.  The standard requires entities to recognize lease assets and liabilities on the balance sheet and to disclose key information about leasing arrangements.   ASU 2016-02 will become effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption allowed.  The Company is currently evaluating the impact of the new guidance on our consolidated financial statements.

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers,” which provides guidance for revenue recognition. ASU 2014-09 supersedes the revenue recognition requirements in ASC 605, “Revenue Recognition,” and requires entities to recognize revenue in a way that depicts the transfer of goods or services to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 will be effective for annual and interim reporting periods beginning after December 15, 2016. Early adoption is not permitted. Upon adoption, an entity may apply the new guidance either retrospectively to each prior reporting period presented or retrospectively only to customer contracts not yet completed as of the date of adoption with the cumulative effect of initially applying the standard recognized in beginning retained earnings at the date of the initial application. In August 2015, the FASB issued ASU 2015-14, “Revenue from Contracts with Customers – Deferral of the Effective Date,” which defers the effective date of ASU 2014-09 by one year, with the option of early adoption as of the original effective date. The amendment in ASU 2015-14 will result in ASU 2014-09 being effective for annual and interim reporting periods beginning after December 15, 2017. The Company is currently evaluating the impact of the new standard on the Company’s consolidated financial statements.

Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern

In August 2014, the FASB issued ASU 2014-15, "Presentation of Financial Statements - Going Concern (Subtopic 205-40)," which requires management to assess a company’s ability to continue as a going concern and to provide related footnote disclosures in certain circumstances. ASU 2014-15 will be effective for annual reporting periods ending after December 15, 2016. Early application is permitted. The Company does not expect the adoption of ASU 2014-15 to have an impact on the Company’s consolidated financial statements.

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Business Combinations

12 Months Ended

Dec. 31, 2015

Business Combinations [Abstract]

Business Combinations

3. Business Combinations

Skyetek

On December 18, 2015, the Company acquired all assets and certain liabilities of Skyetek Inc. (“Skyetek”), a Denver, Colorado-based provider of embedded and standalone RFID solutions for medical OEM’s, for a total purchase price of $2.8 million, subject to customary working capital adjustments. The purchase price includes $2.6 million in cash paid for the acquisition and $0.2 million in estimated fair value of future contingent consideration payable upon the achievement of certain sales order commitment targets from October 2015 through June 2017.The undiscounted range of possible contingent consideration is zero to $0.3 million. Skyetek specializes in high-performing HF and UHF RFID technologies that maximize efficiency and visibility for OEM’s serving the medical and advanced industrial markets. The acquisition creates an expanded range of highly competitive RFID solutions that significantly enhances our value proposition to OEM customers in various industries, but especially within the healthcare industry where there is an ever-growing need for improvements in workflow solutions, patient safety, anti-counterfeiting, and asset tracking throughout the hospital environment.

Lincoln Laser

On November 9, 2015, the Company acquired certain assets and liabilities of Lincoln Laser Company (“Lincoln Laser”), a Phoenix, Arizona-based provider of ultrafast precision polygon scanners and other optical scanning solutions for the medical, food processing, and advanced industrial markets, for a total purchase price of $12.6 million, subject to customary working capital adjustments. This total purchase price includes $10.3 million in cash paid for the acquisition and $2.3 million in estimated fair value of future contingent consideration payable upon the achievement of certain revenue targets for fiscal year 2016. The undiscounted range of contingent consideration is zero to $6.0 million. Lincoln Laser specializes in ultrafast scanning, leveraging their expertise in polygon motor design and electro-optic subsystems. The acquisition creates an expanded range of highly competitive beam delivery technologies.Lincoln Laser contributed revenues of $1.9 million and a loss from continuing operations before income taxes of $0.3 million for the year ended December 31, 2015.

Applimotion

On February 19, 2015, the Company acquired 100% of the outstanding stock of Applimotion Inc. (“Applimotion”), a Loomis, California based provider of advanced precision motor and motion control technology to OEM customers in the medical and advanced industrial markets, for a total purchase price of $14.0 million, net of working capital adjustments. This total purchase price includes $13.0 million in cash paid for the acquisition and $1.0 million in estimated fair value of future contingent considerations payable upon the achievement of certain revenue targets for the fiscal years 2015 to 2017. The undiscounted range of contingent considerations is zero to $4.0 million. Applimotion specializes in motor applications that require highly precise and dynamic motion control. The acquisition enhances our strategic position in precision motion control by enabling us to offer a broader range of motion control technologies and integrated solutions.Applimotion contributed revenues of $14.0 million and income from continuing operations before income taxes of $1.0 million for the year ended December 31, 2015.

The purchase price for Skyetek, Lincoln Laser and Applimotion was allocated as follows (in thousands):

	Amount
Cash	$	331
Accounts receivable		3,166
Inventory		3,544
Prepaid expenses and other current assets		148
Property and equipment		3,220
Intangible assets		11,370
Goodwill		12,710
Other assets		10
Total assets acquired		34,499
Accounts payable		1,681
Other liabilities		1,197
Deferred tax liabilities		2,308
Total liabilities assumed		5,186
Total assets acquired, net of liabilities assumed		29,313
Less: cash acquired		331
Plus: working capital adjustments		464
Total purchase price, net of cash acquired		29,446
Less: contingent consideration		3,459
Net cash used for acquisition of businesses	$	25,987

As of December 31, 2015, the working capital adjustments for Skyetek and Lincoln Laser had not yet been finalized and were estimated to be an additional payment of less than $0.1 million to Skyetek and an additional cash receipt of $0.5 million from Lincoln Laser. These have been included in accrued expenses and other current liabilities and prepaid expenses and other current assets, respectively, in the consolidated balance sheet.

The fair value of intangible assets for Skyetek, Lincoln Laser and Applimotion is comprised of the following (dollar amounts in thousands):

			Weighted Average
	Estimated Fair		Amortization
	Value		Period
Customer relationships	$	4,266	12 years
Developed technology		4,993	10 years
Trademarks and trade names		593	9 years
Non-compete covenant		684	4 years
Backlog		834	1 year
Total	$	11,370

The purchase price allocation resulted in $12.7 million of goodwill and $11.4 million of identifiable intangible assets, $10.3 million of which is expected to be deductible for tax purposes. Intangible assets are being amortized over their weighted average useful lives primarily based upon the pattern in which anticipated economic benefits from such assets are expected to be realized. The goodwill recorded represents the anticipated incremental value of future cash flow potential attributable to: (i) the ability to develop and market new products and technologies; (ii) the ability to develop relationships with new customers; and (iii) expected sales synergies from cross-selling current and future product offerings of Skyetek, Lincoln Laser, Applimotion and the Company to OEM customers.

The results of the SkyeTek, Lincoln Laser and Applimotion acquisitions were included in the Company’s results of operations beginning on the respective acquisition dates. The pro forma financial information reflecting the operating results of Skyetek, Lincoln Laser and Applimotion as if they had been acquired on January 1, 2014 is not presented herein as it would not differ materially from the operating results of the Company as reported for 2014. Skyetek, Lincoln Laser and Applimotion are included in the Company’s Vision Technologies, Laser Products and Precision Motion reportable segments, respectively.

JADAK

On March 14, 2014, the Company acquired 100% of the outstanding equity interests of JADAK, LLC , JADAK Technologies, Inc., and Advanced Data Capture Corporation (collectively, “JADAK”), a North Syracuse, New York-based provider of optical data collection and machine vision technologies to OEM medical device manufacturers, for $93.7 million in cash, net of working capital adjustments. The addition of JADAK has enabled the Company to offer a broader range of highly engineered enabling technologies to leading medical equipment manufacturers.JADAK contributed revenues of $45.4 million and loss from continuing operations before income taxes of $2.7 million for the year ended December 31, 2014.

The final purchase price allocation is as follows (in thousands):

	Amount
Cash	$	1,140
Accounts receivable		7,907
Inventory		6,865
Property and equipment		904
Intangible assets		40,250
Goodwill		44,584
Other assets		2,064
Total assets acquired		103,714
Accounts payable		3,057
Other liabilities		2,380
Deferred tax liabilities		3,481
Total liabilities assumed		8,918
Total assets acquired and liabilities assumed		94,796
Less: cash acquired		1,140
Total purchase price, net of cash acquired	$	93,656

The fair value of JADAK intangible assets is comprised of the following (in thousands):

			Weighted Average
	Estimated Fair		Amortization
	Value		Period
Customer relationships	$	23,570	20 years
Developed technology		10,910	10 years
Trademarks and trade names		2,130	10 years
Backlog		1,810	1 year
Non-compete covenant		1,830	5 years
Total	$	40,250

The purchase price allocation resulted in $44.6 million of goodwill and $40.3 million of identifiable intangible assets, $61.8 million of which is expected to be deductible for tax purposes. Intangible assets are being amortized over their weighted average useful lives primarily based upon the pattern in which economic benefits related to such assets are expected to be realized. The amount of goodwill recorded represents the anticipated incremental value of future cash flow potential attributable to: (i) JADAK’s ability to develop and market new products and technologies; (ii) JADAK’s ability to develop relationships with new customers; and (iii) expected sales synergies from cross-selling current and future product offerings of both JADAK and the Company to OEM customers.

The following unaudited pro forma information presents the combined financial results for the Company and JADAK as if the acquisition of JADAK had been completed as of January 1, 2013 (in thousands, except per share information):

	Year Ended December 31,
	2014			2013
Revenue	$	375,737		$	370,462
Income (loss) from continuing operations	$	(16,067	)	$	11,900
Earnings per share from continuing operations - Basic	$	(0.47	)	$	0.35
Earnings per share from continuing operations - Diluted	$	(0.47	)	$	0.35

The pro forma information for all periods includes the effects of acquisition accounting, including amortization charges from acquired intangible assets, interest expense on borrowings in connection with the acquisition, and the related tax effects as though the acquisition of JADAK had been consummated as of the beginning of 2013. These pro forma results exclude the impact of transaction costs included in the historical results and the related tax effects. The pro forma financial information is presented for comparative purposes only and is not necessarily indicative of the results of operations that actually would have been achieved if the acquisition had taken place at the beginning of 2013.

NDS

On January 15, 2013, the Company acquired 100% of the outstanding membership interests of NDS Surgical Imaging, LLC and 100% of the outstanding stock of NDS Surgical Imaging KK (collectively, “NDS”) for $80.8 million in cash consideration, net of working capital adjustments. After the payment of closing working capital, a total of $5.4 million was held in escrow as indemnification for certain representations and warranty claims against the seller until the expiration of the escrow arrangement. In September 2014, the Company received the full remaining amount of $5.4 million held in escrow following the Company’s claims for breach of certain terms of the January 15, 2013 Securities Purchase Agreement for the acquisition of NDS. The escrow recovery was accounted for as a reduction to goodwill as the $5.4 million payment was clearly and directly related to the acquisition price. The escrow recovery resulted in a final adjusted NDS purchase price of $75.4 million.

The allocation of the purchase price is based upon a valuation of assets and liabilities acquired. Assets acquired and liabilities assumed have been recorded at their estimated fair values as of the acquisition date. The fair values of intangible assets were based on valuations using an income approach, with estimates and assumptions provided by management of NDS and the Company. The excess of the purchase price over the tangible assets, identifiable intangible assets and assumed liabilities was recorded as goodwill.

The total final purchase price allocation for the NDS acquisition was as follows (in thousands):

	Amount
Accounts receivable	$	10,327
Inventory		14,144
Property and equipment		2,426
Intangible assets		37,817
Goodwill		21,160
Other assets		1,782
Total assets acquired		87,656
Accounts payable		4,768
Other liabilities		7,149
Deferred tax liabilities		384
Total liabilities assumed		12,301
Total purchase price	$	75,355

The fair value of NDS intangible assets is comprised of the following (in thousands):

			Weighted Average
	Estimated Fair		Amortization
	Value		Period
Customer relationships	$	22,294	20 years
Developed technology		6,689	10 years
Trademarks and trade names		7,565	20 years
Backlog		1,269	1 year
Total	$	37,817

NDS contributed revenues of $68.4 million and loss from continuing operations before income taxes of $3.4 million for the year ended December 31, 2013.

Acquisition Costs

The Company recognized acquisition costs of $0.9 million, $0.7 million and $1.5 million in the years ended December 31, 2015, 2014 and 2013, respectively, primarily related to the acquisitions of Skyetek, Lincoln Laser, Applimotion, JADAK and NDS. These amounts were included in restructuring, acquisition and divestiture related costs in the consolidated statements of operations.

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Discontinued Operations and Divestitures

12 Months Ended

Dec. 31, 2015

Discontinued Operations And Disposal Groups [Abstract]

Discontinued Operations and Divestitures

4. Discontinued Operations and Divestitures

Divestitures

In April 2015, the Company completed the sale of certain assets and liabilities of the JK Lasers business, previously included in the Laser Products reportable segment, for approximately $29.6 million in cash, net of final working capital adjustments and transactions costs. The Company recognized a pre-tax gain on sale of $19.6 million in the consolidated statement of operations. The JK Lasers business divestiture does not qualify for discontinued operations accounting treatment.

Discontinued Operations

In June 2015, the Company finalized an agreement to divest its 50% owned joint venture, the India JV, and recorded a pre-tax loss of less than $0.1 million in operating loss from discontinued operations, net of tax in the consolidated statement of operations during the year ended December 31, 2015. The India JV was reported as discontinued operations in the Company’s consolidated financial statements because it was part of the Scientific Lasers business that the Company divested in July 2014. All assets, liabilities, accumulated other comprehensive income and non-controlling interest of the India JV were derecognized as of the date of the agreement.

In July 2014, the Company completed the sale of certain assets and liabilities of the Scientific Lasers business, operating under the Continuum and Quantronix brand names, for approximately $6.5 million, net of working capital adjustments, and recognized a $1.7 million loss, net of tax, in the consolidated statement of operations during the year ended December 31, 2014. The Company began accounting for the Scientific Lasers business, which was previously included in the Laser Products reportable segment, as discontinued operations in the first quarter of 2014. In accordance with the purchase and sales agreement, $1.5 million of the sales proceeds was held in escrow until January 2016. The Company recorded the $1.5 million escrow in other current assets on the consolidated balance sheet. In January 2016, the $1.5 million escrow was released to the Company in full.

In May 2013, the Company consummated the sale of certain assets and liabilities of the Semiconductor Systems business, sold under the GSI brand name, to Electro Scientific Industries, Inc. (“ESI”) for $9.7 million in cash, including working capital adjustments of $1.7 million received in September 2013. The Company recognized a $0.4 million loss on the sale, net of tax, in the consolidated statements of operations during the year ended December 31, 2013.

In October 2012, the Company sold certain assets and liabilities of the Laser Systems business, operating under the Control Laser and Baublys brand names, for $7.0 million to Hans Laser, subject to working capital adjustments, and recorded a $2.3 million gain, net of tax, in the consolidated statement of operations during the year ended December 31, 2012. In September 2013, the Company paid $0.4 million to Hans Laser as the final net working capital adjustment which resulted in an additional loss of $0.2 million, net of tax.

Assets and liabilities of discontinued operations as of December 31, 2014 included the balances of the India JV. There were no assets and liabilities of discontinued operations as of December 31, 2015. The major components of the assets and liabilities of discontinued operations as of December 31, 2014, respectively, were as follows (in thousands):

	2014
Accounts receivable, net	$	95
Inventories		161
Other assets		375
Assets of discontinued operations	$	631
Accounts payable	$	16
Accrued expenses and other current liabilities		74
Other liabilities		234
Liabilities of discontinued operations	$	324

The following table presents the operating results which are reported as discontinued operations in the Company’s consolidated statements of operations (in thousands):

	Year Ended December 31,
	2015			2014			2013
Revenue from discontinued operations	$	—		$	10,514		$	33,792
Loss from discontinued operations, before income tax	$	(13	)	$	(8,059	)	$	(3,361	)
Loss from discontinued operations, net of tax	$	(13	)	$	(5,607	)	$	(2,054	)
Loss on disposal of discontinued operations, net of tax	$	—		$	(1,726	)	$	(592	)

The loss from discontinued operations for the year ended December 31, 2014 included a $3.0 million fair value write-down of the Scientific Lasers business to its fair value less costs to sell and a $0.5 million fair value write-down of the India JV.

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Accumulated Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

5. Accumulated Other Comprehensive Income (Loss)

Comprehensive income (loss) is defined as net income or loss and other changes in stockholders’ equity that do not represent transactions with stockholders or in the Company’s stock. Changes in accumulated other comprehensive income (loss) is as follows (in thousands):

	Total accumulated
	other			Cumulative
	comprehensive			translation				Pension
	income (loss)			adjustment				liability
Balance at December 31, 2012		(9,749	)			1,299				(11,048	)
Other comprehensive income		2,686				54				2,632
Amounts reclassified from other comprehensive income (loss) (1)		721				—				721
Balance at December 31, 2013	$	(6,342	)		$	1,353			$	(7,695	)
Other comprehensive loss		(10,488	)			(6,968	)			(3,520	)
Amounts reclassified from other comprehensive income (loss) (1)		374				—				374
Balance at December 31, 2014	$	(16,456	)		$	(5,615	)		$	(10,841	)
Other comprehensive income (loss)		(3,249	)			(4,083	)			834
Amounts reclassified from other comprehensive income (loss) (1)		875				—				875
Balance at December 31, 2015	$	(18,830	)		$	(9,698	)		$	(9,132	)

(1) The amounts reclassified from other comprehensive income (loss) were included in selling, general and administrative expenses in the consolidated statements of operations.

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Goodwill, Intangible Assets and Impairment Charges

12 Months Ended

Dec. 31, 2015

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill, Intangible Assets and Impairment Charges

6. Goodwill, Intangible Assets and Impairment Charges

Goodwill

The following table summarizes changes in goodwill during the year ended December 31, 2015 (in thousands):

	December 31, 2015
Balance at beginning of year	$	90,746
Goodwill acquired from the Applimotion acquisition		7,672
Goodwill acquired from the Lincoln Laser acquisition		3,367
Goodwill acquired from the Skyetek acquisition		1,671
Balance at end of year	$	103,456

Goodwill acquired from the Applimotion, Lincoln Laser and Skyetek acquisitions is reflected in the Precision Motion, Laser Products and Vision Technologies segments, respectively. Goodwill by reportable segment as of December 31, 2015 is as follows (in thousands):

	Reportable Segment
	Laser Products			Vision Technologies			Precision Motion			Total
Goodwill	$	136,321		$	84,401		$	33,963		$	254,685
Accumulated impairment of goodwill		(102,461	)		(31,722	)		(17,046	)		(151,229	)
Total	$	33,860		$	52,679		$	16,917		$	103,456

Goodwill by reportable segment as of December 31, 2014 is as follows (in thousands):

	Reportable Segment
	Laser Products			Vision Technologies			Precision Motion			Total
Goodwill	$	132,954		$	82,730		$	26,291		$	241,975
Accumulated impairment of goodwill		(102,461	)		(31,722	)		(17,046	)		(151,229	)
Total	$	30,493		$	51,008		$	9,245		$	90,746

Intangible Assets

Intangible assets as of December 31, 2015 and 2014, respectively, are summarized as follows (in thousands):

	December 31, 2015
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Remaining Life (Years)
Amortizable intangible assets:
Patents and acquired technologies	$	82,821	$	(66,297	)	$	16,524		7.7
Customer relationships		67,168		(36,914	)		30,254		13.6
Customer backlog		2,644		(2,589	)		55		1.0
Non-compete covenant		2,514		(882	)		1,632		3.2
Trademarks and trade names		10,711		(5,934	)		4,777		9.1
Amortizable intangible assets		165,858		(112,616	)		53,242		11.0
Non-amortizable intangible assets:
Trade names		13,027		—			13,027
Total	$	178,885	$	(112,616	)	$	66,269

	December 31, 2014
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Remaining Life (Years)
Amortizable intangible assets:
Patents and acquired technologies	$	78,253	$	(62,010	)	$	16,243		7.5
Customer relationships		63,029		(31,531	)		31,498		14.7
Customer backlog		1,810		(1,641	)		169		0.2
Non-compete covenant		1,830		(366	)		1,464		4.2
Trademarks and trade names		10,205		(5,364	)		4,841		9.8
Amortizable intangible assets		155,127		(100,912	)		54,215		11.8
Non-amortizable intangible assets:
Trade names		13,027		—			13,027
Total	$	168,154	$	(100,912	)	$	67,242

All definite-lived intangible assets are amortized either on a straight-line basis or an economic benefit basis over their remaining useful life. Amortization expense for customer relationships and definite-lived trademarks, trade names and other intangibles is included in operating expenses in the accompanying consolidated statements of operations. Amortization expense for patents and acquired technologies is included in cost of revenue in the accompanying consolidated statements of operations. Amortization expense is as follows (in thousands):

	Year Ended December 31,
	2015		2014		2013
Amortization expense – cost of revenue	$	4,712	$	6,143	$	5,280
Amortization expense – operating expenses		7,611		10,262		7,270
Total amortization expense	$	12,323	$	16,405	$	12,550

Estimated future amortization expense for each of the five succeeding years and thereafter is as follows (in thousands):

Year Ending December 31,	Cost of Revenue		Operating Expenses		Total
2016	$	3,963	$	7,498	$	11,461
2017		3,600		6,898		10,498
2018		2,080		6,306		8,386
2019		1,768		4,324		6,092
2020		1,501		2,418		3,919
Thereafter		3,612		9,274		12,886
Total	$	16,524	$	36,718	$	53,242

Impairment Charges

The most recent annual goodwill and indefinite-lived intangible asset impairment test was performed as of the beginning of the second quarter of 2015, noting no impairment. With the exception of our NDS reporting unit, implied fair values of all reporting units exceeded their carrying values by at least 20%.

During the fourth quarter of 2014, the Company completed its annual operating plan for the NDS business following the MEDICA and RSNA tradeshows, two main tradeshows for the NDS business. Expectations for sales and operating profit were lowered significantly versus prior forecasts. The lower expectations for sales and operating profit were driven by a strategic decision to discontinue certain NDS products, lack of seasonal uptick during the fourth quarter of 2014 attributable to slower than expected hospital capital expenditures, and lower than expected customer orders from the fourth quarter tradeshows.

In considering the above mentioned factors, the Company determined that a triggering event occurred in the fourth quarter of 2014 and that an interim impairment review of the goodwill and intangible assets related to the NDS reporting unit was necessary.  First, the Company performed a long-lived asset recoverability test in accordance with ASC 360-10-35-15, “Impairment or Disposal of Long-Lived Assets,” on the lowest level of identifiable cash flows, which was determined to be the NDS business.  The recoverability test compared the carrying value of the NDS business to the undiscounted cash flows. As a result of this recoverability test, the Company determined that the assets were not recoverable.  The Company then determined the fair value of the NDS business using a discounted cash flow methodology, which resulted in a $21.8 million intangible assets impairment charge in the fourth quarter of 2014. The impairment charge is reflected in the operating results of the Vision Technologies segment.  

Subsequent to impairing the NDS business’s long-lived assets, step one of the goodwill impairment analysis was performed.  As the carrying value of the NDS reporting unit exceeded its implied fair value, the Company performed the second step of the goodwill impairment test, comparing the implied fair value of the reporting unit’s goodwill with its carrying amount to measure the impairment loss. The implied fair value of goodwill is determined in the same manner as the amount of goodwill recognized in a business combination, whereby the estimated fair value of the reporting unit is allocated to all of the assets and liabilities of that reporting unit as if the reporting unit had been acquired in a business combination and the fair value of the reporting unit was the purchase price paid. If the carrying amount of the reporting unit’s goodwill exceeds its implied fair value, an impairment loss is recognized in an amount equal to that excess. After completing the second step of the goodwill impairment test, the Company recorded a $19.6 million goodwill impairment charge in the fourth quarter of 2014. The impairment charge is reflected in the operating results of the Vision Technologies segment.    

The results of the impairment review as of December 31, 2014 are summarized in the following table (in thousands):

	Pre-Impairment Net Carrying Value		Impairment Charge			Post-Impairment Net Carrying Value
Goodwill	$	110,321	$	(19,575	)	$	90,746
Intangible assets		89,109		(21,867	)		67,242
Total	$	199,430	$	(41,442	)	$	157,988

The Company did not have any goodwill or indefinite-lived intangible asset impairment charges during the year ended December 31, 2013.

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Fair Value Measurements

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurements

7. Fair Value Measurements

ASC 820, “Fair Value Measurement,” establishes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the third is considered unobservable:

Level 1: Quoted prices for identical assets or liabilities in active markets which the Company can access.

Level 2: Observable inputs other than those described in Level 1.

Level 3: Unobservable inputs.

Cash equivalents

The Company’s cash equivalents are investments in money market accounts, which represent the only asset the Company measures at fair value on a recurring basis. The Company determines the fair value of our cash equivalents using a market approach based on quoted prices in active markets. The fair values of cash, accounts receivable, income taxes receivable, accounts payable, income taxes payable and accrued expenses and other current liabilities approximate their carrying values because of their short-term nature.

Contingent consideration

Under the purchase and sale agreement for the Skyetek acquisition, the owners of Skyetek are eligible to receive contingent consideration based on the achievement of certain sales order commitment targets from October 2015 through June 2017. If such targets are achieved, the contingent consideration will be payable in 2017. The Company recognized an estimated fair value of $0.2 million as part of the purchase price as of the acquisition date. Subsequent changes in the estimated fair value of this contingent liability will be recorded in the consolidated statement of operations as acquisition related costs until the liability is fully settled. There have been no changes to the fair value of the contingent consideration since the acquisition date. The estimated fair value of the contingent consideration is reported as a long-term liability in the consolidated balance sheet.

Under the purchase and sale agreement for the Lincoln Laser acquisition, the shareholders of Lincoln Laser are eligible to receive contingent consideration based on the achievement of certain revenue targets for fiscal year 2016. If such targets are achieved, the contingent consideration will be payable in cash in one installment in 2017. The estimated fair value of the contingent consideration was determined based on the Monte Carlo valuation method and has been recorded as part of the purchase price as of the acquisition date. Subsequent changes in the estimated fair value of this contingent liability will be recorded in the consolidated statement of operations as acquisition related costs until the liability is fully settled. There have been no changes to the fair value of the contingent consideration since the acquisition date. The estimated fair value of the contingent consideration is reported as a long-term liability in the consolidated balance sheet.

The Company acquired Applimotion on February 19, 2015. The former shareholders of Applimotion are eligible to receive contingent consideration based on the achievement of certain revenue targets for fiscal years 2015 to 2017. If such targets are achieved, the contingent consideration will be payable in cash in two installments in 2017 and 2018, respectively. The estimated fair value of the contingent consideration was determined based on the Monte Carlo valuation method and has been recorded as part of the purchase price as of the acquisition date. Subsequent changes in the estimated fair value of this contingent liability will be recorded in the consolidated statement of operations until the liability is fully settled. In December 2015, a $0.4 million increase in the estimated fair value of this contingent liability was recorded in the consolidated statement of operations in restructuring, acquisition and divestiture related costs. The estimated fair value of the contingent consideration is reported as a long-term liability in the consolidated balance sheet.

The following table summarizes the fair values of our assets and liabilities measured at fair value on a recurring basis as of December 31, 2015 (in thousands):

			Quoted Prices in				Significant Other
			Active Markets for		Significant Other		Unobservable
			Identical Assets		Observable Inputs		Inputs
	Fair Value		(Level 1)		(Level 2)		(Level 3)
Assets
Cash equivalents	$	4,657	$	4,657	$	—	$	—
Liabilities
Contingent consideration	$	3,889	$	—	$	—	$	3,889

The following table summarizes the fair values of our financial assets as of December 31, 2014 (in thousands):

			Quoted Prices in				Significant Other
			Active Markets for		Significant Other		Unobservable
			Identical Assets		Observable Inputs		Inputs
	Fair Value		(Level 1)		(Level 2)		(Level 3)
Assets
Cash equivalents	$	2,255	$	2,255	$	—	$	—

Changes in the fair value of our Level 3 contingent consideration for the year ended December 31, 2015 were as follows (in thousands):

	Contingent Consideration
Balance at December 31, 2014	$	—
Acquisition of Applimotion		965
Fair value adjustment		430
Acquisition of Lincoln Laser		2,344
Acquisition of Skyetek		150
Balance at December 31, 2015	$	3,889

There were no Level 3 assets or liabilities during the year ended December 31, 2014.

The following table provides quantitative information associated with the fair value measurement of the Company’s Level 3 liabilities:

Liability	December 31, 2015 Fair Value (in thousands)	Valuation Technique	Unobservable Inputs	Percentage Applied
Contingent consideration (Applimotion)	$1,395	Monte Carlo method	Historical and projected revenues for fiscal years 2015 to 2017 Revenue volatility Cost of debt WACC	N/A 87.3% 2.82% 11.1%
Contingent consideration (Lincoln Laser)	$2,344	Monte Carlo method	Projected revenues for fiscal year 2016 Revenue volatility Cost of debt WACC	N/A 37.1% 4.7% 9.8%

Increases or decreases in the unobservable inputs noted above would result in a higher or lower fair value measurement.

Except for the assets and liabilities acquired from the Applimotion, Lincoln Laser and Skyetek acquisitions, as disclosed in Note 3, there were no assets and liabilities that were measured at fair value on a non-recurring basis during 2015. See Note 10 for discussion of the estimated fair value of the Company’s outstanding debt and Note 12 for discussion of the estimated fair value of the Company’s pension plan assets.

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Earnings (Loss) per Common Share

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Earnings (Loss) per Common Share

8. Earnings (Loss) per Common Share

Basic earnings (loss) per common share is computed by dividing net income (loss) by the weighted average number of common shares outstanding during the year. For diluted earnings (loss) per common share, the denominator also includes the dilutive effect of outstanding restricted stock units determined using the treasury stock method. Dilutive effects of contingently issuable shares are included in the weighted average dilutive share calculation when the contingencies have been resolved. For years in which net losses are generated, the dilutive potential common shares are excluded from the calculation of diluted earnings per share as the effect would be anti-dilutive.

The following table sets forth the computation of basic and diluted earnings (loss) per share (in thousands, except per share amounts):

	Year Ended December 31,
	2015			2014			2013
Numerators:
Income (loss) from continuing operations	$	35,628		$	(16,909	)	$	9,977
Consolidated loss from discontinued operations		(13	)		(7,333	)		(2,646	)
Less: income attributable to noncontrolling interest		—			(10	)		(22	)
Loss from discontinued operations attributable to GSI Group Inc.		(13	)		(7,343	)		(2,668	)
Net income (loss) attributable to GSI Group Inc.	$	35,615		$	(24,252	)	$	7,309
Denominators:
Weighted average common shares outstanding— basic		34,579			34,352			34,073
Dilutive potential common shares (1)		248			—			323
Weighted average common shares outstanding— diluted		34,827			34,352			34,396
Antidilutive common shares excluded from above		—			439			246
Basic Earnings (Loss) per Common Share:
From continuing operations	$	1.03		$	(0.49	)	$	0.29
From discontinued operations	$	(0.00	)	$	(0.21	)	$	(0.08	)
Basic earnings (loss) per share attributable to GSI Group Inc.	$	1.03		$	(0.70	)	$	0.21
Diluted Earnings (Loss) per Common Share:
From continuing operations	$	1.02		$	(0.49	)	$	0.29
From discontinued operations	$	(0.00	)	$	(0.21	)	$	(0.08	)
Diluted earnings (loss) per share attributable to GSI Group Inc.	$	1.02		$	(0.70	)	$	0.21

(1) Due to the Company’s net loss position for the year ended December 31, 2014, all potentially dilutive shares were excluded as their effect would have been anti-dilutive.

Common Stock Repurchases

In October 2013, the Company’s Board of Directors authorized a share repurchase plan under which the Company may repurchase outstanding shares of the Company’s common stock up to an aggregate amount of $10.0 million. The shares may be repurchased from time to time, at the Company’s discretion, based on ongoing assessment of the capital needs of the business, the market price of the Company’s common stock, and general market conditions. Shares may also be repurchased through an accelerated stock purchase agreement, on the open market or in privately negotiated transactions in accordance with applicable federal securities laws. Repurchases may be made under certain SEC regulations, which would permit common stock to be purchased when the Company would otherwise be prohibited from doing so under insider trading laws. The share repurchase plan does not obligate the Company to acquire any particular amount of common stock. No time limit was set for the completion of the share repurchase program, and the program may be suspended or discontinued at any time. The Company expects to fund the share repurchase through cash on hand and future cash flow from operations. During 2015, the Company repurchased 122 thousand shares in the open market for an aggregate purchase price of $1.6 million at an average price of $13.29 per share. As of December 31, 2015, the Company had repurchased an aggregate of 172 thousand shares for an aggregate purchase price of $2.2 million at an average price of $12.48 per share.

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Supplementary Balance Sheet Information

12 Months Ended

Dec. 31, 2015

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Supplementary Balance Sheet Information

9. Supplementary Balance Sheet Information

The following tables provide the details of selected balance sheet items as of the dates indicated (in thousands):

Inventories

	December 31,
	2015		2014
Raw materials	$	38,511	$	38,934
Work-in-process		10,138		9,899
Finished goods		9,266		11,945
Demo and consigned inventory		1,651		2,165
Total inventories	$	59,566	$	62,943

Property, Plant and Equipment, net

	December 31,
	2015			2014
Cost:
Land, buildings and improvements	$	48,154		$	46,222
Machinery and equipment		43,376			50,487
Total cost		91,530			96,709
Accumulated depreciation		(50,980	)		(56,621	)
Property, plant and equipment, net	$	40,550		$	40,088

As of December 31, 2015 and 2014, the Company has gross assets under capital lease of $13.2 and $12.7 million, respectively. The assets acquired under capital leases are included in land, buildings and improvements and machinery and equipment and the related amortization expense is included in depreciation expense. The Company also capitalized software development costs of $1.9 million, $0.2 million and $0.2 million in 2015, 2014 and 2013, respectively, in accordance with the guidance in ASC 350-40, “Internal-Use Software.” The following table summarizes depreciation expense on property, plant and equipment, including demo units and assets under capital leases (in thousands):

	Year Ended December 31,
	2015		2014		2013
Depreciation expense	$	7,873	$	8,016	$	7,400

The following table summarizes total accumulated depreciation on assets under capital leases as of the dates indicated (in thousands):

	December 31,
	2015		2014
Accumulated depreciation on assets under capital leases	$	3,798	$	2,741

Accrued Expenses and Other Current Liabilities

The following table summarizes accrued expenses and other current liabilities as of the dates indicated (in thousands):

	December 31,
	2015		2014
Accrued compensation and benefits	$	7,357	$	7,741
Accrued warranty		3,335		3,044
Accrued restructuring		1,652		109
Accrued professional services fees and other		8,838		8,507
Total	$	21,182	$	19,401

Accrued Warranty

The following table summarizes accrued warranty activities for the periods indicated (in thousands):

	Year Ended December 31,
	2015			2014
Balance at beginning of year	$	3,044		$	3,315
Provision charged to cost of revenue		2,025			1,684
Acquisition related warranty accrual		132			90
Use of provision		(1,454	)		(2,003	)
Divestiture of JK Lasers		(389	)		—
Foreign currency exchange rate changes		(23	)		(42	)
Balance at end of year	$	3,335		$	3,044

Other Long Term Liabilities

The following table summarizes other long term liabilities as of the dates indicated (in thousands):

	December 31,
	2015		2014
Capital lease obligations	$	9,173	$	9,507
Accrued pension liabilities		3,693		6,037
Accrued contingent considerations		3,889		—
Other		2,690		3,275
Total		19,445		18,819

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Debt

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Debt

10. Debt

Debt consisted of the following (in thousands):

	December 31,
	2015			2014
Senior Credit Facilities – term loan	$	7,500		$	7,500
Less: unamortized debt issuance costs		(115	)		(155	)
Total current portion of long-term debt	$	7,385		$	7,345
Senior Credit Facilities – term loan	$	20,000		$	27,500
Senior Credit Facilities – revolving credit facility		70,000			80,000
Less: unamortized debt issuance costs		(1,574	)		(2,470	)
Total long-term debt	$	88,426		$	105,030
Total Senior Credit Facilities	$	95,811		$	112,375

Senior Credit Facilities

On December 27, 2012, the Company entered into an amended and restated senior secured credit agreement (the “Amended and Restated Credit Agreement”) with new and existing lenders for an aggregate credit facility of $125.0 million, consisting of a $50.0 million, 5-year, term loan facility and a $75.0 million, 5-year, revolving credit facility (collectively, the “Senior Credit Facilities”). The Senior Credit Facilities mature in December 2017.

The borrowings outstanding under the credit facility bear interest at rates based on (a) the Eurodollar Rate, as defined in the Amended and Restated Credit Agreement, plus a rate ranging from 2.00% to 3.00% per annum or (b) the Base Rate, as defined in the Amended and Restated Credit Agreement, plus a rate ranging from 1.00% to 2.00% per annum, in each case based upon the Company’s consolidated leverage ratio. The Company is also required to pay a commitment fee on unused commitments under the revolving credit facility ranging between 0.250% and 0.625% per annum, which is based upon the Company’s consolidated leverage ratio.

The Amended and Restated Credit Agreement contains various customary representations, warranties and covenants applicable to the Company and its subsidiaries, including: (i) covenants regarding maximum consolidated leverage ratio and minimum consolidated fixed charge coverage ratio; (ii) limitations on restricted payments, including dividend payments and stock repurchases, provided that the Company may repurchase its outstanding common shares so long as, immediately after giving effect to the share repurchase, the Company’s consolidated leverage ratio is no more than 2.25:1.00, and the Company has unrestricted cash plus amounts available for borrowing under the Senior Credit Facilities of at least $25.0 million immediately after giving effect on the share repurchase; (iii) limitations on fundamental changes involving the Company; (iv) limitations on the disposition of assets; and (v) limitations on indebtedness, investments, and liens.

The Company’s obligations under the Senior Credit Facilities are secured on a senior basis by a lien on substantially all of the assets of the Company and its material United States (“U.S.”) and United Kingdom (“U.K.”) subsidiaries and guaranteed by the Company and its material U.S. and U.K. subsidiaries. The Amended and Restated Credit Agreement also contains customary events of default.

The Company entered into three amendments to the Amended and Restated Credit Agreement during 2013 and one amendment during 2014. The first and second amendments resulted in immaterial modifications. On September 13, 2013, the Company entered into a third amendment (the “Third Amendment”) which increased the accordion feature provided in the Amended and Restated Agreement from uncommitted $50.0 million to uncommitted $100.0 million in aggregate of the revolving credit facility and term loan. On February 10, 2014, the Company entered into a fourth amendment (the “Fourth Amendment”), which increased the revolving credit facility commitment under the Amended and Restated Credit Agreement by $100 million from $75 million to $175 million and reset the accordion feature to $100 million for future expansion. Additionally, the Fourth Amendment increased the maximum permitted consolidated leverage ratio from 2.75 to 3.00, and increased the maximum consolidated leverage ratio for permitted acquisitions and stock repurchases from 2.25 to 2.50. The Company was in compliance with these debt covenants as of December 31, 2015.

On January 22, 2016, the Company entered into a fifth amendment to the Amended and Restated Credit Agreement (the “Fifth Amendment”). The Fifth Amendment resulted in immaterial modifications.

The principal on the Company’s outstanding term loan matures as follows (in thousands):

	Term Loan
2016	$	7,500
2017		20,000
Total debt repayments	$	27,500

The Company may voluntarily prepay loans or reduce commitments under the Senior Credit Facilities, in whole or in part, without premium or penalty, subject to certain minimum principal amounts.

The Company may be required to prepay outstanding loans under the Amended and Restated Credit Agreement with the net proceeds of certain asset dispositions and incurrences of certain debt. At the election of the Company, and so long as no default shall have occurred, the Company may reinvest within a year all or any portion of the net proceeds from such asset dispositions or incurrences of debt.

As of December 31, 2015, the Company had $105.0 million available to be drawn under the revolving credit facility. Excluding commitment fees, the interest rate for the credit facility was approximately 2.9% as of December 31, 2015. The commitment fee rate for the unused commitments under the revolving credit facility was approximately 0.4% as of December 31, 2015.

Guarantees

Each Guarantor, as defined in the Amended and Restated Credit Agreement, jointly and severally, unconditionally guarantees the due and punctual payment of the principal, interest and fees under the Senior Credit Facilities, when due and payable, whether at maturity, by required prepayment, by acceleration or otherwise. In addition, Guarantors guarantee the due and punctual payment, fees and interest on the overdue principal of the Senior Credit Facilities and the due and punctual performance of all obligations of the Company in accordance with the terms of the Amended and Restated Credit Agreement. Furthermore, each Guarantor, jointly and severally, unconditionally guarantees that in the event of any extension, renewal, amendment, refinancing or modification of any of the Senior Credit Facilities or any of such other Obligations, as defined in the Amended and Restated Credit Agreement, amounts due will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, at stated maturity, by acceleration or otherwise.

The obligations of each Guarantor are limited to the maximum amount, after giving effect to all other contingent and fixed liabilities or any collections from or payments made by or on behalf of any other Guarantor. Each Guarantor that makes a payment or distribution under a Guarantee is entitled to a contribution from each other Guarantor of its Pro Rata Share, as defined in the Amended and Restated Credit Agreement, based on the adjusted net assets of each Guarantor. The Guarantees will continue to be effective or be reinstated, as the case may be, if at any time any payment of any of the obligations of the Guarantors is rescinded or must otherwise be returned upon the insolvency, bankruptcy or reorganization of the Company, a Guarantor or otherwise, all as though such payment had not been made.

Each Guarantor may be released from its obligations under its respective Guarantee and its obligations under the Amended and Restated Credit Agreement upon the occurrence of certain events, including, but not limited to: (i) the Guarantor ceases to be a subsidiary; and (ii) payment in full of the principal, accrued and unpaid interest on the Senior Credit Facilities and all other obligations.

As of December 31, 2015, the maximum potential amount of future payments the Guarantors could be required to make under the Guarantee is the principal amount of the Senior Credit Facilities plus all accrued unpaid interest thereon. However, as of December 31, 2015, the Guarantors are not expected to be required to perform under the Guarantee.

Mortgages

In connection with the Amended and Restated Credit Agreement and as required thereby, GSI Group Corporation and Excel Technology, Inc. (“Excel”), each a subsidiary of the Company, continues to be subject to an Open-End Deed of Trust, Assignment of Leases and Rents, Security Agreement and Fixture Filing, dated as of October 19, 2011, in favor of or for the benefit of the Trustee, wherein GSI Group Corporation and Excel mortgaged, granted, bargained, assigned, sold and conveyed their respective interest in the property located in Mukilteo, Washington, Chatsworth, California, Orlando, Florida and Phoenix, Arizona, respectively, to secure (a) the payment of all of the obligations of the Borrower and the Guarantors under the Amended and Restated Credit Agreement, the respective mortgages and the other Security Documents (as defined in the respective mortgage), and (b) the performance of all terms, covenants, conditions, provisions, agreements and liabilities contained in the credit agreement.

Fair Value of Debt

As of December 31, 2015 and 2014, the outstanding balance of the Company’s debt approximated fair value based on current rates available to the Company for debt of the same maturities.

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Share-Based Compensation

12 Months Ended

Dec. 31, 2015

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-Based Compensation

11. Share-Based Compensation

Capital Stock

The authorized capital of the Company consists of an unlimited number of common shares without nominal or par value. Holders of common shares are entitled to one vote per share. Holders of common shares are entitled to receive dividends, if and when declared by the Board of Directors, and to share ratably in its assets legally available for distribution to the stockholders in the event of liquidation. Holders of common shares have no redemption or conversion rights.

2010 Incentive Award Plan

In November 2010, the Company’s stockholders approved the 2010 Incentive Award Plan (the “2010 Incentive Plan”), under which the Company may grant share-based compensation awards to employees, consultants and directors. In May 2014, the Company’s stockholders approved the amended and restated 2010 Incentive Award Plan (the “Amended and Restated 2010 Incentive Plan”). The maximum number of shares which can be issued pursuant to the Amended and Restated 2010 Incentive Plan is 4,398,613, subject to adjustment as set forth in the Amended and Restated 2010 Incentive Plan. The Amended and Restated 2010 Incentive Plan provides for the grant of incentive stock options, non-qualified stock options, restricted stock, restricted stock units, stock appreciation rights, deferred stock, deferred stock units, dividends equivalents, performance awards and stock payments (collectively referred to as “Awards”). The Amended and Restated 2010 Incentive Plan allows the Company to continue to grant awards intended to constitute “performance-based compensation” for purposes of Section 162(m) of the Internal Revenue Code of 1986, as amended, and includes certain provisions that reflect good corporate governance practices. The Amended and Restated 2010 Incentive Plan provides for specific limits on the number of shares with respect to Awards that may be granted to any person during any calendar year and the amount of cash that can be paid with respect to Awards to any one person during any calendar year. The Amended and Restated 2010 Incentive Plan will expire and no further Awards may be granted after April 9, 2024. As of December 31, 2015, there were 1,986,154 shares available for future awards under the Amended and Restated 2010 Incentive Plan.

Restricted stock units represent the right to receive common shares or the fair market value of such shares in cash as determined by the administrator of the Amended and Restated 2010 Incentive Plan at a specified date in the future, subject to forfeiture of such right. The purchase price for restricted stock units, if any, will be determined by the administrator of the Amended and Restated 2010 Incentive Plan on an award-by-award basis. Deferred stock units entitle the recipient thereof to receive one share of common stock on the date such deferred stock unit becomes vested and other conditions are removed or expire, if applicable, or upon a specified settlement date thereafter. Deferred stock units are typically awarded without payment of consideration.

Shares subject to Awards that have expired, forfeited or settled in cash, or repurchased by the Company at the same price paid by the awardee may be added back to the number of shares available for grant under the Amended and Restated 2010 Incentive Plan and may be granted as new Awards. Shares that are used to pay the exercise price for an option, shares withheld to pay taxes, shares subject to a stock appreciation right that are not issued in connection with the stock settlement of the stock appreciation right on exercise thereof, and shares purchased on the open market with the cash proceeds from the exercise of options will not be added back to the number of shares available for grant under the Amended and Restated 2010 Incentive Plan. Shares issued to satisfy Awards under the Amended and Restated 2010 Incentive Plan may be previously authorized but unissued shares, treasury shares or shares repurchased on the open market.

The table below summarizes activities relating to restricted and deferred stock units issued and outstanding under the Amended and Restated 2010 Incentive Plan during the year ended December 31, 2015:

	Restricted and Deferred Stock Units (In thousands)			Weighted Average Grant Date Fair Value		Weighted Average Remaining Vesting Period (in years)	Aggregate Intrinsic Value (1) (In thousands)
Unvested at December 31, 2014		749		$	10.80
Granted		345		$	13.46
Vested		(428	)	$	10.73
Forfeited		(47	)	$	11.11
Unvested at December 31, 2015		619		$	12.32	0.88 years	$	8,429
Expected to vest as of December 31, 2015		605		$	12.31	0.88 years	$	8,243

(1) The aggregate intrinsic value is calculated based on the fair value of $13.62 per share of the Company’s common stock on December 31, 2015 due to the fact that the restricted stock units carry a $0 purchase price.

The total fair value of restricted stock units that vested in 2015, based on the market price of the underlying stock on the day of vesting, was $5.1 million.

Other Issuances

In March 2014, the Company granted restricted stock units in an aggregate of 180,000 shares as employment inducement awards related to an acquisition. These restricted stock units are performance-based awards and would vest after two years if certain financial targets and service conditions have been achieved. In 2015, these financial targets were no longer deemed probable and the cumulative expense recognized in the prior year was reversed. The share-based compensation expense and related adjustments for these awards are recorded in restructuring, acquisition and divestiture related costs in the consolidated statement of operations.

Share-Based Compensation Expense

The table below summarizes share-based compensation expense recorded in income from continuing operations (in thousands):

	Year Ended December 31,
	2015			2014		2013
Selling, general and administrative	$	3,960		$	3,967	$	5,144
Research and development and engineering		170			196		180
Cost of revenue		257			166		118
Restructuring, acquisition and divestiture related costs		(322	)		322		125
Total share-based compensation expense	$	4,065		$	4,651	$	5,567

The expense recorded during each of the years ended December 31, 2015, 2014 and 2013 included $0.5 million, related to deferred stock units granted to the members of the Company’s Board of Directors pursuant to the Company’s Amended and Restated 2010 Incentive Plan. The expense associated with the respective deferred stock units was recognized in full on the respective date of grant, as the deferred stock units were fully vested and nonforfeitable upon grant.

The Company’s restricted stock unit awards have generally been issued with a three-year vesting period and vest based solely on service conditions. Accordingly, the Company generally recognizes compensation expense on a straight-line basis over the requisite service period. The Company reduces the compensation expense by an estimated forfeiture rate which is based on anticipated forfeitures and actual experience.

As of December 31, 2015, the Company’s outstanding equity awards for which compensation expense will be recognized in the future consist of time-based restricted stock units granted under the Amended and Restated 2010 Incentive Plan. The Company expects to record aggregate share-based compensation expense of $4.9 million, net of estimated forfeitures, subsequent to December 31, 2015, over a weighted average period of 1.9 years, for all outstanding equity awards.

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Employee Benefit Plans

12 Months Ended

Dec. 31, 2015

Compensation And Retirement Disclosure [Abstract]

Employee Benefit Plans

12. Employee Benefit Plans

Defined Benefit Plans

The Company maintains a defined benefit pension plan in the United Kingdom (the “U.K. Plan”). In 1997, membership to the U.K. Plan was closed. In 2003, the Company was allowed to stop accruing additional benefits to the participants. Benefits under the U.K. Plan were based on the employees’ years of service and compensation as of 2003. The Company continues to fund the plan in sufficient amounts to cover current benefit payments as well as to fund a portion of the unfunded pension obligations based on periodic agreements with the trustees of the U.K. Plan.

The net periodic pension cost included the following components (in thousands):

	Year Ended December 31,
	2015			2014			2013
Components of the net periodic pension cost:
Interest cost	$	1,340		$	1,589		$	1,403
Expected return on plan assets		(1,844	)		(1,958	)		(1,595	)
Amortization of actuarial losses		875			374			668
Net periodic pension cost	$	371		$	5		$	476

The actuarial assumptions used to compute the net periodic pension cost for the years ended December 31, 2015, 2014 and 2013, respectively, for the U.K. Plan were as follows:

	Year Ended December 31,
	2015			2014			2013
Weighted-average discount rate		3.5	%		4.6	%		4.3	%
Weighted-average long-term rate of return on plan assets		5.6	%		5.9	%		5.7	%

The actuarial assumptions used to compute the funded status of the U.K. Plan as of December 31, 2015 and 2014, respectively,  were as follows:

	December 31,
	2015			2014
Weighted-average discount rate		3.8	%		3.5	%
Rate of inflation		2.8	%		2.7	%

The discount rates used are derived from (AA) corporate bonds that have maturities approximating the terms of the related obligations. In estimating the expected return on plan assets, the Company considered the historical performance of the major asset classes held and current forecasts of future rates of return for these asset classes.

The following table provides a reconciliation of benefit obligations and plan assets of the U.K. Plan (in thousands):

	December 31,
	2015			2014
Change in benefit obligation:
Projected benefit obligation at beginning of year	$	39,421		$	35,193
Interest cost		1,340			1,589
Actuarial (gains) losses		(2,083	)		6,060
Benefits paid		(798	)		(1,006	)
Foreign currency exchange rate changes		(1,966	)		(2,415	)
Projected benefit obligation at end of year	$	35,914		$	39,421
Accumulated benefit obligation at end of year	$	35,914		$	39,421
Change in plan assets:
Fair value of plan assets at beginning of year	$	33,610		$	33,457
Actual return on plan assets		342			2,234
Employer contributions		955			1,000
Benefits paid		(798	)		(1,006	)
Foreign currency exchange rate changes		(1,735	)		(2,075	)
Fair value of plan assets at end of year	$	32,374		$	33,610
Funded status at end of year	$	(3,540	)	$	(5,811	)
Amounts included in accumulated other comprehensive loss not yet recognized in net periodic pension cost:
Net actuarial loss	$	(9,874	)	$	(11,890	)
Amounts expected to be amortized from accumulated other comprehensive loss into net periodic pension cost over the next fiscal year consists of:
Net actuarial loss	$	794		$	892

The funded status of the U.K. Plan is included in other long term liabilities in the accompanying consolidated balance sheets.

The following table reflects the total expected benefit payments to plan participants and have been estimated based on the same assumptions used to measure the Company’s benefit obligations as of December 31, 2015 (in thousands):

	Amount
2016	$	941
2017		1,043
2018		868
2019		1,244
2020		1,428
2021-2025		8,135
Total	$	13,659

In the U.K., funding valuations are conducted every three years in order to determine the future level of contributions. Based on the results of the most recent valuation completed in the fourth quarter 2015, the Company’s annual contributions will be approximately $1.0 million per year in 2016 and will increase by 2.9% per year thereafter.

Fair Value of Plan Assets

The Company’s overall objective is to invest plan assets in a portfolio of diversified assets, primarily through the use of institutional collective funds, to achieve long-term growth. The strategic asset allocation uses a combination of risk controlled and index strategies in fixed income and global equities. The target allocations are approximately 60% to funds investing in global equities, approximately 18% to funds investing in global bonds, approximately 9% to alternative assets (including private equity, real estate and hedge funds), and approximately 13% in cash.

The following table summarizes the fair values of Plan assets by asset category as of December 31, 2015 (in thousands):

Asset Category	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)
Mutual Funds:
Balanced (1)	$	15,611	$	—	$	15,611	$	—
Growth (2)		16,583		—		16,583		—
Cash		180		180		—		—
Total	$	32,374	$	180	$	32,194	$	—

(1) This class comprises a diversified portfolio of global investments which seeks a balanced return between capital growth and fixed income and is allocated on a weighted average basis as follows: equities (52%), bonds (24%), other assets (9%) and cash (15%).

(2) This class comprises a diversified portfolio of global investments which seeks long-term capital growth and is allocated on a weighted average basis as follows: equities (67%), bonds (12%), other assets (9%) and cash (12%).

The following table summarizes the fair values of Plan assets by asset category as of December 31, 2014 (in thousands):

Asset Category	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)
Mutual Funds:
Balanced (1)	$	16,287	$	—	$	16,287	$	—
Growth (2)		17,149		—		17,149		—
Cash		174		174		—		—
Total	$	33,610	$	174	$	33,436	$	—

(1) This class comprises a diversified portfolio of global investments which seeks a balanced return between capital growth and fixed income and is allocated on a weighted average basis as follows: equities (54%), bonds (32%), other assets (5%) and cash (9%).

(2) This class comprises a diversified portfolio of global investments which seeks long-term capital growth and is allocated on a weighted average basis as follows: equities (67%), other assets (15%), bonds (8%), and cash (10%).

The tables above present the fair value of plan assets in accordance with the fair value hierarchy. Certain pension plan assets are measured using net asset value per share (or its equivalent) and are reported as a level 2 investment above. These investments have quoted prices in inactive markets and there are significant other observable inputs which can be corroborated by observable market data for substantially the full term of the plan assets.

Defined Contribution Plans

The Company has defined contribution employee savings plans in the U.K., Japan, and the U.S. The Company matches the contributions of participating employees on the basis of percentages specified in each plan. Company matching contributions to the plans were $2.7 million, $2.6 million and $1.7 million for the years ended December 31, 2015, 2014 and 2013, respectively.

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Income Taxes

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Income Taxes

13. Income Taxes

Components of the Company’s income (loss) from continuing operations before income taxes are as follows (in thousands):

	Year Ended December 31,
	2015			2014			2013
Income (loss) from continuing operations before income taxes:
Canadian	$	(1,674	)	$	(20,212	)	$	(5,366	)
U.S.		23,298			(9,661	)		12,838
Other		24,398			11,958			8,705
Total	$	46,022		$	(17,915	)	$	16,177

Components of the Company’s income tax provision (benefit) are as follows (in thousands):

	Year Ended December 31,
	2015			2014			2013
Current
Canadian	$	96		$	175		$	—
U.S.		8,136			3,615			1,662
Other		3,854			1,940			652
		12,086			5,730			2,314
Deferred
Canadian		—			—			—
U.S.		(3,239	)		(6,731	)		2,206
Other		1,547			(5	)		1,680
		(1,692	)		(6,736	)		3,886
Total	$	10,394		$	(1,006	)	$	6,200

The Company is incorporated in Canada and therefore uses the Canadian statutory rate for income tax disclosure. The reconciliation of the statutory Canadian tax rate to the effective tax rate related to income before income taxes from continuing operations is as follows (in thousands, except percentage data):

	Year Ended December 31,
	2015			2014			2013
Statutory Canadian tax rate		27.00	%		27.00	%		26.00	%
Expected income tax provision at Canadian statutory tax rate	$	12,426		$	(4,837	)	$	4,206
International tax rate differences		304			(1,132	)		156
State income taxes, net		453			(271	)		148
Withholding and other taxes		680			421			321
Permanent differences		1,130			486			106
Section 199 deduction		(1,188	)		(574	)		—
Change in valuation allowance		(612	)		4,809			(3,076	)
Provision to return differences		(617	)		962			(312	)
Tax credits		(990	)		(1,678	)		(938	)
Net operating loss expirations		—			—			4,538
Statutory tax rate change		95			(13	)		354
Uncertain tax positions		121			134			259
IRS audit		(748	)		241			680
JK Lasers divestiture		(1,432	)		—			—
Goodwill impairment		—			330			—
Other		772			116			(242	)
Reported income tax provision (benefit)	$	10,394		$	(1,006	)	$	6,200
Effective tax rate		22.6	%		5.6	%		38.3	%

Deferred income taxes result principally from temporary differences in the recognition of certain revenue and expense items and operating loss and tax credit carryforwards for financial and tax reporting purposes. Significant components of the Company’s deferred tax assets and liabilities as of December 31, 2015 and 2014 are as follows (in thousands):

	December 31,
	2015			2014
Deferred tax assets:
Losses & IRC Section 163(j) carryforwards	$	9,985		$	12,742
Compensation related deductions		2,915			3,749
Tax credits		2,409			3,502
Restructuring related liabilities		294			64
Inventory		4,415			4,495
Depreciation		503			683
Amortization		3,205			—
Warranty		1,127			876
Other		1,281			2,206
Total deferred tax assets		26,134			28,317
Valuation allowance for deferred tax assets		(12,537	)		(14,495	)
Net deferred tax assets	$	13,597		$	13,822
Deferred tax liabilities:
Equity investment	$	(1,733	)	$	(1,594	)
Depreciation		—			(341	)
Amortization		(2,791	)		(36	)
Unrealized currency gain/loss		(1,292	)		(2,595	)
Other		(345	)		(525	)
Total deferred tax liabilities	$	(6,161	)	$	(5,091	)
Net deferred income tax assets (liabilities)	$	7,436		$	8,731

In determining its income tax provisions, the Company calculated deferred tax assets and liabilities for each separate jurisdiction. The Company then considered a number of factors, including positive and negative evidence related to the realization of its deferred tax assets, to determine whether a valuation allowance should be recognized with respect to its deferred tax assets.

In 2015, the Company recorded valuation allowance of $0.8 million against its current year net operating losses in certain tax jurisdictions. Further, the Company released $0.8 million of valuation allowance recorded on certain U.S. state tax net operating losses and utilized $0.6 million of its U.S. capital loss carryforward against the current year net capital gain.

In 2014, the Company recorded valuation allowance of $0.3 million against its current year net operating losses in certain tax jurisdictions and increased valuation allowance recorded on certain U.S. state tax net operating losses by $0.3 million and capital loss carryforwards by $0.4 million.

In 2013, the Company adjusted a portion of its Canadian loss carryforward and the related valuation allowance of $4.8 million. The Company also recorded $1.3 million valuation allowances against its 2013 net operating losses in certain other tax jurisdictions and released valuation allowance of $0.3 million previously recorded on certain U.S. state tax credits. Additionally, the Company adjusted the carrying value of deferred tax assets on net operating losses and tax credits and their related valuation allowance in Canada and the U.K. as a result of changes in statutory tax rates amounting to $0.7 million in 2013.

Valuation allowance continues to be provided on the remaining balances of the U.S. capital loss, certain U.S. state net operating loss and certain foreign tax attributes that the Company has determined that it is more likely than not that they will not be realized. In conjunction with the Company’s ongoing review of its actual results and anticipated future earnings, the Company continuously reassesses the possibility of releasing the valuation allowance currently in place on its deferred tax assets.

As of December 31, 2015, the Company had net operating loss carryforwards of $4.9 million (tax effected) available to reduce future taxable income. Of this amount, approximately $1.6 million relates to the U.S. and expires through 2034; $2.4 million relates to Canada and expires starting in 2031; $0.7 million relates to the U.K. and can be carried forward indefinitely; and other countries of $0.2 million, which will start expiring in 2020.

As of December 31, 2014, the Company had net operating loss carryforwards of $4.5 million (tax effected) available to reduce future taxable income. Of this amount, approximately $1.4 million relates to the U.S. and expires through 2033; $2.3 million relates to Canada and expires starting in 2015; and $0.8 million relates to the U.K. and can be carried forward indefinitely.

As of December 31, 2015, the Company had tax credit carryforwards of approximately $2.4 million available to reduce income taxes in future years. Approximately $0.7 million relates to the U.S. state tax attributes, of which $0.6 million will expire through 2030 and $0.1 million can be carried forward indefinitely. The remaining $1.7 million tax credit carryforwards were related to Canada, of which $1.1 million expires through 2022 and $0.6 million can be carried forward indefinitely.

As of December 31, 2014, the Company had tax credit carryforwards of approximately $4.2 million available to reduce income taxes in future years. Approximately $2.1 million relates to the U.S. tax attributes (both federal and state) and expires through 2034. The remaining $2.1 million relates to Canada, of which $0.8 million expires through 2021 and $1.3 million can be carried forward indefinitely.

Income and foreign withholding taxes have not been recognized on the excess of the amount for financial reporting purposes over the tax basis of investments in foreign subsidiaries that are essentially permanent in nature. This amount becomes taxable upon a repatriation of assets from a subsidiary or a sale or liquidation of a subsidiary. The amount of undistributed earnings of foreign subsidiaries totaled $18.2 million as of December 31, 2015. The estimated unrecognized deferred income tax liabilities on this temporary difference is approximately $0.4 million.

As of December 31, 2015, the Company’s total amount of gross unrecognized tax benefits was $5.5 million, of which $4.1 million would favorably affect its effective tax rate. Over the next twelve months, the Company may need to record up to $1.2 million of previously unrecognized tax benefits in the event of statute of limitations closures. The Company believes there are no other jurisdictions in which the outcome of unresolved issues or claims is likely to be material to its results of operations, financial position or cash flows. Furthermore, the Company believes it has adequately provided for all income tax uncertainties.

As of December 31, 2014, the Company’s total amount of gross unrecognized tax benefits was $6.3 million, of which $4.1 million would favorably affect its effective tax rate, if recognized. As of December 31, 2013, the Company’s total amount of gross unrecognized tax benefits was $7.1 million, of which $4.9 million would favorably affect its effective tax rate, if recognized.

The reconciliation of the total amounts of unrecognized tax benefits is as follows (in thousands):

Balance at December 31, 2012	$	7,554
Additions based on tax positions related to the current year		508
Additions for tax positions of prior years		1,475
Reductions for tax positions of prior years		(1,888	)
Reductions to tax positions resulting from a lapse of the applicable statute of limitations		(575	)
Balance at December 31, 2013		7,074
Additions based on tax positions related to the current year		1,180
Additions for tax positions of prior years		2,601
Reductions for tax positions of prior years		(2,404	)
Reductions to tax positions resulting from a lapse of the applicable statute of limitations		(2,177	)
Balance at December 31, 2014		6,274
Additions based on tax positions related to the current year		752
Additions for tax positions of prior years		78
Reductions for tax positions of prior years		(626	)
Reductions to tax positions resulting from a lapse of the applicable statute of limitations		(226	)
Settlements with tax authorities		(762	)
Balance at December 31, 2015	$	5,490

The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. As of each of December 31, 2015 and 2014, the Company had approximately $0.9 million of accrued interest and penalties related to uncertain tax positions. During the year ended December 31, 2015, the Company recognized less than $0.1 million of expense for an increase in interest and penalties related to uncertain tax positions. During the year ended December 31, 2014, the Company recognized approximately $0.3 million of expense for an increase in interest and penalties related to uncertain tax positions.

The Company files income tax returns in Canada, the U.S., and various states and foreign jurisdictions. Generally, the Company is no longer subject to U.S. or foreign income tax examinations by tax authorities for the years before 2007.

The Company’s income tax returns may be reviewed by tax authorities in the following countries for the following periods under the appropriate statute of limitations:

United States	2009 -  Present
Canada	2010 -  Present
United Kingdom	2014 -  Present
Germany	2008 -  Present
Netherlands	2010 -  Present
China	2012 -  Present
Japan	2011 -  Present

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Restructuring, Acquisition and Divestiture Related Costs

12 Months Ended

Dec. 31, 2015

Restructuring And Related Activities [Abstract]

Restructuring, Acquisition and Divestiture Related Costs

14. Restructuring, Acquisition and Divestiture Related Costs

The following table summarizes restructuring, acquisition and divestiture related costs recorded in the accompanying consolidated statements of operations (in thousands):

	Year Ended December 31,
	2015		2014		2013
2016 restructuring	$	3,148	$	—	$	—
2015 restructuring		1,484		—		—
2013 restructuring		—		25		2,463
2011 restructuring		1,208		389		1,287
Germany restructuring		—		—		7
Total restructuring charges	$	5,840	$	414	$	3,757
Acquisition and related charges	$	1,301	$	1,521	$	1,630
Divestiture related charges		1,113		—		—
Total acquisition and divestiture related charges	$	2,414	$	1,521	$	1,630
Total restructuring, acquisition and divestiture related costs	$	8,254	$	1,935	$	5,387

2016 Restructuring

During the third quarter of 2015, the Company initiated the 2016 restructuring program, which includes consolidating certain of our manufacturing operations to optimize our facility footprint and better utilize resources, and reducing redundant costs due to productivity cost savings and business volume reductions. Restructuring costs incurred in 2015 of $2.6 million, $0.3 million and $0.2 million were related to severance, facility, and other, respectively. We anticipate completing the 2016 restructuring program during the second quarter of 2016.

The following table summarizes restructuring costs associated with the 2016 restructuring program for each segment and unallocated corporate costs for the year ended December 31, 2015 (in thousands):

	Year Ended
	December 31, 2015		Expected Cumulative Costs
Laser Products	$	55	$300  ̶  $400
Vision Technologies		2,200	3,200  ̶  3,700
Precision Motion		833	700  ̶  1,000
Unallocated Corporate and Shared Services		60		300  ̶  400
Total	$	3,148	$4,500   ̶  $5,500

2015 Restructuring

During the first quarter of 2015, the Company implemented a program to eliminate redundant costs, as a result of acquisition and divestiture activities, to better align our operations to our strategic growth plans, to further integrate our business lines, and as a consequence of our productivity initiatives. Restructuring costs incurred in 2015 of $1.4 million and $0.1 million were related to severance and other, respectively. The plan was substantially completed during 2015.

The following table summarizes the total costs for each segment and unallocated corporate costs related to the 2015 restructuring plan (in thousands):

	Year Ended
	December 31, 2015
Laser Products	$	542
Vision Technologies		525
Precision Motion		79
Unallocated Corporate and Shared Services		338
Total	$	1,484

2013 Restructuring

During the first half of 2013, the Company initiated a program following our acquisition of NDS to integrate the NDS business into our operating structure and further reduce manufacturing and operating costs across businesses to leverage our infrastructure and further integrate our product lines.

The following table summarizes restructuring costs for each segment and unallocated corporate costs related to the 2013 restructuring program (in thousands):

	Year Ended
	December 31, 2013
Laser Products	$	836
Vision Technologies		806
Precision Motion		378
Unallocated Corporate and Shared Services		443
Total	$	2,463

2011 Restructuring

In November 2011, the Company announced a strategic initiative (“2011 restructuring”) which aimed to consolidate operations to reduce the Company’s cost structure and improve operational efficiency. In total, eleven facilities have been exited as part of the 2011 restructuring plan. These eliminations resulted in the consolidation of the manufacturing facilities of the Scientific Lasers business and the optics products, the consolidation of the Company’s German operations into one facility, the consolidation of the laser scanners business into the Company’s Bedford, Massachusetts facility and the consolidation of the Company’s Japan operation into one facility. Included in the eleven facilities exited are five facilities exited as part of the Semiconductor and Laser Systems business divestitures. The restructuring costs for the Semiconductor and Laser Systems businesses have been excluded from the table below as they have been reported as part of the operating results from discontinued operations. The Company substantially completed the 2011 restructuring program in 2013. Restructuring costs from the 2011 restructuring program recognized in 2014 and 2015 are primarily depreciation and other costs for the idle facility that was vacated by the Laser Systems business.

The following table summarizes restructuring costs for each segment and unallocated corporate costs related to the 2011 restructuring plan (in thousands):

								Cumulative
	Year Ended December 31,							Costs as of
	2015		2014			2013		December 31, 2015
Laser Products	$	—	$	(106	)	$	1,042	$	1,939
Vision Technologies		—		—			48		48
Precision Motion		—		—			5		122
Unallocated Corporate and Shared Services		1,208		495			192		3,153
Total	$	1,208	$	389		$	1,287	$	5,262

Presented below are actual cash charges, including severance, relocation, facility closure and consulting costs, and non-cash charges for depreciation related to the 2011 restructuring plan (in thousands):

								Cumulative
	Year Ended December 31,							Costs as of
	2015		2014			2013		December 31, 2015
Cash charges	$	126	$	(235	)	$	1,037	$	3,174
Non-cash charges		1,082		624			250		2,088
Total restructuring costs	$	1,208	$	389		$	1,287	$	5,262

Rollforward of Accrued Expenses Related to Restructuring

The following table summarizes the accrual activities, by component, related to the Company’s restructuring charges recorded in the accompanying consolidated balance sheets (in thousands):

	Total			Severance			Facility			Depreciation			Other
Balance at December 31, 2013	$	1,374		$	687		$	648		$	—		$	39
Restructuring charges		414			(83	)		(247	)		624			120
Cash payments		(933	)		(502	)		(293	)		—			(138	)
Non-cash write-offs and other adjustments		(624	)		—			—			(624	)		—
Balance at December 31, 2014		231			102			108			—			21
Restructuring charges		5,840			3,918			441			1,082			399
Cash payments		(3,126	)		(2,668	)		(156	)		—			(302	)
Non-cash write-offs and other adjustments		(1,063	)		6			13			(1,082	)		—
Balance at December 31, 2015	$	1,882		$	1,358		$	406		$	—		$	118

The Company expects to make $1.8 million in cash payments during the twelve months ending December 31, 2016.

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2015

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

15. Commitments and Contingencies

Operating Leases

The Company leases certain equipment and facilities under operating lease agreements. Most of these lease agreements expire between 2017 and 2019. In the U.K., where longer lease terms are more common, the Company has a land lease that extends through 2078. During the years ended December 31, 2015, 2014 and 2013, the Company recorded lease expense of $4.5 million, $4.1 million and $4.9 million, respectively. In addition to the base rent, the Company is generally required to pay insurance, real estate taxes and maintenance costs which is recorded in lease expense.  

In connection with the sale of the Scientific Lasers business in 2014, the Company assigned to the buyer the lease for the facility in San Jose, California, where the Scientific Lasers business operated. The buyer assumed all of our rights and obligations under the original lease, including the duty to pay the rent for the remainder term of the lease. So long as the buyer performs its obligations as the tenant, as required by the Asset and Equity Purchase Agreement for its acquisition of the Scientific Lasers business, the Company has no responsibilities for the lease. Should the buyer cease performance under the lease, however, the landlord could still pursue the Company as the original tenant until February 28, 2019, the end of the lease term. In the meantime, the Company has indemnification rights against the buyer under the Asset and Equity Purchase Agreement for such buyer’s default. The lease associated with this facility has been excluded from the operating lease commitments table below.

Capital Leases

     As of December 31, 2015 and 2014, the Company has gross assets under capital lease of $13.2 and $12.7 million, respectively.  

  Future Lease Payments

     Future minimum lease payments under operating and capital leases expiring subsequent to December 31, 2015, including operating leases associated with facilities that have been vacated as a result of the Company’s restructuring actions, are as follows (in thousands):

Year Ending December 31,	Operating Lease		Capital Lease(1)
2016	$	4,973	$	1,498
2017		3,536		1,398
2018		2,723		968
2019		1,735		935
2020		154		907
Thereafter		5,361		8,139
Total minimum lease payments	$	18,482	$	13,845

(1) Capital lease payments include interest payments of $3.8 million.

Purchase Commitments

As of December 31, 2015, the Company had unconditional commitments primarily for inventory purchases of $35.9 million. These purchase commitments are expected to be incurred as follows: $34.1 million in 2016, $1.5 million in 2017, and $0.3 million in 2018.

Legal Proceedings

The Company is subject to various legal proceedings and claims that arise in the ordinary course of business. The Company does not believe that the outcome of these claims will have a material adverse effect upon its consolidated financial statements but there can be no assurance that any such claims, or any similar claims, would not have a material adverse effect upon its consolidated financial statements.

Guarantees and Indemnifications

In the normal course of its operations, the Company executes agreements that provide for indemnification and guarantees to counterparties in transactions such as business dispositions, sale of assets, sale of products and operating leases. Additionally, the by-laws of the Company require it to indemnify certain current or former directors, officers, and employees of the Company against expenses incurred by them in connection with each proceeding in which he or she is involved as a result of serving or having served in certain capacities. Indemnification is not available with respect to a proceeding as to which it has been adjudicated that the person did not act in good faith in the reasonable belief that the action was in the best interests of the Company. Certain of our officers and directors are also a party to indemnification agreements with the Company. These indemnification agreements provide, among other things, that the director and officer shall be indemnified to the fullest extent permitted by applicable law against all expenses, judgments, fines and amounts paid in settlement actually and reasonably incurred by such officer or director in connection with any proceeding by reason of his or her relationship with the Company. In addition, the indemnification agreements provide for the advancement of expenses incurred by such director or officer in connection with any proceeding covered by the indemnification agreement, subject to the conditions set forth therein and to the extent such advancement is not prohibited by law. The indemnification agreements also set out the procedures for determining entitlement to indemnification, the requirements relating to notice and defense of claims for which indemnification is sought, the procedures for enforcement of indemnification rights, the limitations on and exclusions from indemnification, and the minimum levels of directors’ and officers’ liability insurance to be maintained by the Company.

On July 1, 2013, the Company provided a Guarantee (the “Guarantee”) in favor of the trustees of the U.K. Plan with respect to all present and future obligations and liabilities (whether actual or contingent and whether owed jointly or severally and in any capacity whatsoever) of GSI Group Limited, a wholly owned subsidiary of GSI Group Inc.

Credit Risks and Other Uncertainties

The Company maintains financial instruments such as cash and cash equivalents and trade receivables. From time to time, certain of these instruments may subject the Company to concentrations of credit risk whereby one institution may hold a significant portion of the cash and cash equivalents, or one customer may represent a large portion of the accounts receivable balances.

There was no significant concentration of credit risk related to the Company’s position in trade accounts receivable as no individual customer represented 10% or more of the Company’s outstanding accounts receivable at December 31, 2015 and 2014. Credit risk with respect to trade accounts receivables is generally minimized because of the diversification of the Company’s operations, as well as its large customer base and its geographical dispersion.

Certain of the components and materials included in the Company’s products are currently obtained from single source suppliers. There can be no assurance that a disruption of this outside supply would not create substantial manufacturing delays and additional cost to the Company.

The Company’s operations involve a number of other risks and uncertainties including, but not limited to, the effects of general economic conditions, rapidly changing technology, and international operations.

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Segment Information

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Segment Information

16. Segment Information

Reportable Segments

The Company evaluates the performance of, and allocates resources to, its segments based on revenue, gross profit and operating profit. The Company’s reportable segments have been identified based on commonality and adjacency of technologies, applications and customers amongst the Company’s individual product lines.

We operate in three reportable segments: Laser Products, Vision Technologies (formerly known as Medical Technologies), and Precision Motion. The reportable segments and their principal activities consist of the following:

Laser Products

The Laser Products segment designs, manufactures and markets photonics-based solutions, including CO2 laser sources, laser scanning and beam delivery products, to customers worldwide. The segment serves highly demanding photonics-based applications such as industrial material processing, metrology, medical and life science imaging, and medical laser procedures. The vast majority of the segment’s product offerings are sold to OEM customers. The segment sells these products both directly, utilizing a highly technical sales force, and indirectly, through resellers and distributors.

Vision Technologies

The Vision Technologies segment designs, manufactures and markets a range of medical grade technologies, including visualization solutions, imaging informatics products, optical data collection and machine vision technologies, radio frequency identification technologies (RFID), thermal printers, and light and color measurement instrumentation to customers worldwide. The vast majority of the segment’s product offerings are sold to OEM customers. The segment sells these products both directly, utilizing a highly technical sales force, and indirectly, through resellers and distributors.

Precision Motion

The Precision Motion segment designs, manufactures and markets optical encoders, precision motor and motion control technology, air bearing spindles and precision machined components to customers worldwide. The vast majority of the segment’s product offerings are sold into the advanced industrial market and the medical market. The segment sells these products both directly, utilizing a highly technical sales force, and indirectly, through resellers and distributors.

Reportable Segment Financial Information

Revenue, gross profit, operating income (loss) from continuing operations, depreciation and amortization, accounts receivable and inventory by reportable segments are as follows (in thousands):

	Year Ended December 31,
	2015		2014		2013
Revenue
Laser Products	$	168,331	$	177,726	$	166,598
Vision Technologies		124,725		122,187		90,276
Precision Motion		80,542		64,793		60,036
Total	$	373,598	$	364,706	$	316,910

	Year Ended December 31,
	2015			2014			2013
Gross Profit
Laser Products	$	73,602		$	74,224		$	68,819
Vision Technologies		48,966			48,678			35,824
Precision Motion		36,709			28,333			27,778
Unallocated Corporate and Shared Services		(1,387	)		(1,068	)		(194	)
Total	$	157,890		$	150,167		$	132,227

	Year Ended December 31,
	2015			2014			2013
Operating Income (Loss) from Continuing Operations
Laser Products	$	35,971		$	33,053		$	25,143
Vision Technologies		(2,057	)		(43,079	)		3,566
Precision Motion		16,877			13,023			12,062
Unallocated Corporate and Shared Services		(21,858	)		(19,803	)		(21,325	)
Total	$	28,933		$	(16,806	)	$	19,446

	Year Ended December 31,
	2015		2014		2013
Depreciation and Amortization
Laser Products	$	6,083	$	6,481	$	6,335
Vision Technologies		8,599		13,254		8,808
Precision Motion		2,533		1,943		1,979
Unallocated Corporate and Shared Services		2,981		2,743		2,828
Total	$	20,196	$	24,421	$	19,950

	December 31,
	2015		2014
Accounts Receivable
Laser Products		21,763		24,083
Vision Technologies		21,691		18,922
Precision Motion		13,734		8,489
Total accounts receivable		57,188		51,494
Inventory
Laser Products		29,501		34,947
Vision Technologies		19,583		19,596
Precision Motion		10,482		8,400
Total inventory		59,566		62,943
Total segment assets		116,754		114,437

	December 31,
	2015		2014
Total Assets
Total segment assets		116,754		114,437
Cash and cash equivalents		59,959		51,146
Income taxes receivable		2,510		5,906
Deferred tax assets		—		5,971
Prepaid expenses and other current assets		5,989		5,081
Assets of discontinued operations		—		631
Property, plant and equipment, net		40,550		40,088
Deferred tax assets		7,885		2,912
Other assets		12,673		12,134
Intangible assets, net		66,269		67,242
Goodwill		103,456		90,746
Total	$	416,045	$	396,294

Geographic Information

The Company aggregates geographic revenue based on the customer location where products are shipped. Revenue to these customers is as follows (in thousands, except percentage data):

	Year Ended December 31,
	2015					2014					2013
	Revenue		% of Total			Revenue		% of Total			Revenue		% of Total
United States	$	154,825		41.4	%	$	140,973		38.7	%	$	107,892		34.0	%
Germany		54,743		14.7			59,029		16.2			56,287		17.8
Rest of Europe		48,277		12.9			54,308		14.9			45,698		14.4
China		38,491		10.3			40,792		11.2			37,651		11.9
Rest of Asia-Pacific		62,467		16.7			58,830		16.1			57,802		18.2
Other		14,795		4.0			10,774		2.9			11,580		3.7
Total	$	373,598		100.0	%	$	364,706		100.0	%	$	316,910		100.0	%

Long-lived assets consist of property, plant and equipment, net, and are aggregated based on the location of the assets. A summary of these long-lived assets is as follows (in thousands):

	December 31,
	2015		2014
United States	$	34,907	$	32,988
Europe		4,014		5,318
China		1,593		1,705
Asia-Pacific and other		36		77
Total	$	40,550	$	40,088

Significant Customers

No customer accounted for greater than 10% of the Company’s sales during the years ended December 31, 2015, 2014 or 2013.

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Supplementary Information

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Supplementary Information

Supplementary Information

(Unaudited)

The Company’s interim financial statements are prepared on a quarterly basis ending on the Friday closest to the end of the calendar quarter, with the exception of the fourth quarter which always ends on December 31.

On April 15, 2015, the Company completed the sale of certain assets and liabilities of the JK Lasers business for $29.6 million in cash, net of the final working capital adjustments and transaction costs, and recorded a pre-tax gain on sale of $19.6 million.

In December 2014, the Company determined that an impairment test of the NDS goodwill and intangible assets was required, resulting in an impairment charge of $41.4 million in operating expenses.

On March 14, 2014, the Company acquired JADAK and started to include the operating results of JADAK in the consolidated financial statements as of the acquisition date. In July 2014, the Company completed the sale of certain assets and liabilities of the Scientific Lasers business for $6.5 million in cash, net of working capital adjustments, and recorded a $1.7 million loss on sale.

The following tables reflect the Company’s unaudited condensed consolidated statements of operations (in thousands except per share data):

	Three Months Ended
	December 31,			October 2,		July 3,			April 3,
	2015			2015		2015			2015
Revenue	$	90,219		$	92,271	$	96,494		$	94,614
Cost of revenue		53,590			52,361		55,149			54,608
Gross profit		36,629			39,910		41,345			40,006
Operating expenses:
Research and development and engineering		7,295			7,693		7,840			8,215
Selling, general and administrative		19,080			19,979		20,922			22,068
Amortization of purchased intangible assets		2,018			1,852		1,852			1,889
Restructuring, acquisition and divestiture related costs		4,022			1,379		416			2,437
Total operating expenses		32,415			30,903		31,030			34,609
Operating income from continuing operations		4,214			9,007		10,315			5,397
Interest income (expense), foreign exchange transaction gains (losses), other income (expense), net and gain on disposal of business		1,721			13		15,506			(151	)
Income from continuing operations before income taxes		5,935			9,020		25,821			5,246
Income tax provision (benefit)		(168	)		2,452		6,310			1,800
Income from continuing operations		6,103			6,568		19,511			3,446
Loss from discontinued operations, net of tax		—			—		(13	)		—
Consolidated net income	$	6,103		$	6,568	$	19,498		$	3,446
Earnings per common share from continuing operations:
Basic	$	0.18		$	0.19	$	0.56		$	0.10
Diluted	$	0.18		$	0.19	$	0.56		$	0.10
Loss per common share from discontinued operations:
Basic	$	—		$	—	$	(0.00	)	$	—
Diluted	$	—		$	—	$	(0.00	)	$	—
Earnings per common share attributable to GSI Group Inc.
Basic	$	0.18		$	0.19	$	0.56		$	0.10
Diluted	$	0.18		$	0.19	$	0.56		$	0.10

	Three Months Ended
	December 31,			September 26,			June 27,			March 28,
	2014			2014			2014			2014
Revenue	$	94,012		$	94,656		$	96,905		$	79,133
Cost of revenue		54,284			54,973			58,254			47,028
Gross profit		39,728			39,683			38,651			32,105
Operating expenses:
Research and development and engineering		7,837			7,735			7,525			5,857
Selling, general and administrative		21,840			21,512			21,410			19,618
Amortization of purchased intangible assets		2,799			2,843			2,876			1,744
Restructuring, acquisition and divestiture related costs		(14	)		771			360			818
Impairment of goodwill and intangible assets		41,442			—			—			—
Total operating expenses		73,904			32,861			32,171			28,037
Operating income (loss) from continuing operations		(34,176	)		6,822			6,480			4,068
Interest income (expense), foreign exchange transaction gains (losses) and other income (expense), net		(127	)		310			(1,017	)		(275	)
Income (loss) from continuing operations before income taxes		(34,303	)		7,132			5,463			3,793
Income tax provision (benefit)		(6,013	)		2,013			2,057			937
Income (loss) from continuing operations		(28,290	)		5,119			3,406			2,856
Loss from discontinued operations, net of tax		(790	)		(273	)		(2,678	)		(1,866	)
Loss on disposal of discontinued operations, net of tax		(1,405	)		(321	)		—			—
Consolidated net income (loss)		(30,485	)		4,525			728			990
Less: Net income attributable to noncontrolling interest		—			—			(3	)		(7	)
Net income (loss) attributable to GSI Group Inc.	$	(30,485	)	$	4,525		$	725		$	983
Earnings (loss) per common share from continuing operations:
Basic	$	(0.82	)	$	0.15		$	0.10		$	0.08
Diluted	$	(0.82	)	$	0.15		$	0.10		$	0.08
Loss per common share from discontinued operations:
Basic	$	(0.06	)	$	(0.02	)	$	(0.08	)	$	(0.05	)
Diluted	$	(0.06	)	$	(0.02	)	$	(0.08	)	$	(0.05	)
Earnings (loss) per common share attributable to GSI Group Inc.
Basic	$	(0.88	)	$	0.13		$	0.02		$	0.03
Diluted	$	(0.88	)	$	0.13		$	0.02		$	0.03

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Organization and Presentation (Policies)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

These consolidated financial statements have been prepared by the Company in U.S. dollars and in accordance with U.S. generally accepted accounting principles, applied on a consistent basis.

The consolidated financial statements include the accounts of GSI Group Inc. and its wholly owned subsidiaries. Intercompany accounts and transactions have been eliminated. In 2015, the Company’s 50% owned joint venture, Excel Laser Technology Private Limited (the “India JV”), was deconsolidated as the Company sold 100% of its interest in the India JV. The accounts of the India JV were previously included in discontinued operations in the consolidated financial statements.  

The Company has a 41% ownership interest in Laser Quantum Ltd. (“Laser Quantum”), a privately held company located in the United Kingdom. The Company records the results of this entity under the equity method as it does not have a controlling interest in the entity.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the dates of the financial statements, and the reported amounts of revenue and expenses during the reporting periods. The Company evaluates its estimates based on historical experience, current conditions and various other assumptions that it believes are reasonable under the circumstances. Estimates and assumptions are reviewed on an on-going basis and the effects of revisions are reflected in the period in which they are deemed to be necessary. Actual results could differ significantly from those estimates.

Foreign Currency Translation

Foreign Currency Translation

The financial statements of the Company and its subsidiaries outside the United States have been translated into U.S. dollars. Assets and liabilities of foreign operations are translated from foreign currencies into U.S. dollars at the exchange rates in effect on the balance sheet date. Revenue and expenses are translated at the average exchange rate in effect for the period. Accordingly, gains and losses resulting from translating foreign currency financial statements are reported as cumulative translation adjustment, a separate component of other comprehensive income (loss) in stockholders’ equity. Foreign currency transaction gains and losses, primarily from transactions denominated in currencies other than the functional currency, are included in the accompanying consolidated statements of operations.

Cash and Cash Equivalents

Cash and Cash Equivalents

Cash equivalents, primarily money market accounts, are highly liquid investments with original maturities of three months or less. These investments are carried at cost, which approximates fair value.

Long-Term Investments

Long-Term Investments

At December 31, 2015 and 2014, the Company had a 41% equity investment in Laser Quantum, a privately held company located in the United Kingdom. During the second quarter of 2013, the Company’s ownership percentage increased from 25% to 41% as a result of a stock buyback program by Laser Quantum. The Company continues to use the equity method to record the results of this entity as it does not have a controlling interest in the entity. The Company recognized investment income of $2.7 million, $2.7 million and $1.5 million during 2015, 2014 and 2013, respectively, which is included in other income (expense) in the accompanying consolidated statements of operations. The Company’s net investment in Laser Quantum was $10.1 million and $8.0 million at December 31, 2015 and 2014, respectively, and is included in other long-term assets in the accompanying consolidated balance sheets.

The summarized financial information for Laser Quantum is as follows (in thousands):

	Year Ended December 31,
	2015		2014		2013
Revenue	$	25,599	$	23,013	$	16,269
Income from operations	$	7,362	$	7,434	$	4,720
Net income	$	6,925	$	6,627	$	3,745

	December 31,
	2015		2014
Total assets (1)	$	30,159	$	25,423
Total liabilities	$	2,552	$	2,482

(1) Total assets at December 31, 2015 and 2014 included cash and cash equivalent of $21.0 million and $17.1 million, respectively.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable are recorded at the invoiced amount. The Company maintains an allowance for doubtful accounts based on the Company’s best estimate of probable credit losses resulting from the inability of the Company’s customers to make required payments. The Company determines the allowance based on a variety of factors, including the age of amounts outstanding relative to their contractual due date, specific customer factors, and other known risks and economic trends. Charges related to the allowance for doubtful accounts are included as selling, general and administrative expenses and are recorded in the period that the outstanding receivables are determined to be uncollectible. Account balances are charged off against the allowance when the Company believes it is probable that the receivable will not be recovered.

For the years ended December 31, 2015, 2014 and 2013, changes in the allowance for doubtful accounts were as follows (in thousands):

	2015			2014			2013
Balance at beginning of year	$	282		$	575		$	294
Provision charged to selling, general and administrative expenses		285			30			301
Allowance resulting from acquisitions		5			52			117
Write-offs, net of recoveries of amounts previously reserved		(29	)		(352	)		(159	)
Divestiture of JK Lasers		(30	)		—			—
Exchange rate changes		(13	)		(23	)		22
Balance at end of year	$	500		$	282		$	575

Inventories

Inventories

Inventories, which include materials and conversion costs, are stated at the lower of cost or market, using the first-in, first-out method. Market is defined as replacement cost for raw materials and net realizable value for other inventories. Demo inventory is recorded at the lower of cost or its net realizable value. The Company periodically reviews quantities of inventories on hand and compares these amounts to the expected use of each product. The Company records a charge to cost of revenue for the amount required to reduce the carrying value of inventory to net realizable value. Costs associated with the procurement of inventories such as inbound freight charges, purchasing and receiving costs are capitalized in inventory on the consolidated balance sheets.

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment are recorded at cost, adjusted for any impairment, less accumulated depreciation. The Company uses the straight-line method to calculate the depreciation of its fixed assets over their estimated useful lives. Estimated useful lives range from 3 to 30 years for buildings and building improvements and 1 to 10 years for machinery and equipment. Leasehold improvements are depreciated over the lesser of their useful lives or lease terms, including any renewal period options that are reasonably assured of being exercised. Repairs and maintenance costs are expensed as incurred. Certain costs to develop software for internal use are capitalized when the criteria under Accounting Standards Codification (“ASC”) 350-40, “Internal-Use Software,” are met. Lease arrangements meeting the criteria of ASC 840-30, “Leases – Capital Leases,” are capitalized based on the present value of future lease payments and depreciated over the term of the lease.

Goodwill, Intangibles and Long-Lived Assets

Goodwill, Intangibles and Long-Lived Assets

Goodwill represents the excess of the purchase price over the tangible assets, identifiable intangible assets and assumed liabilities acquired in a business combination. Allocations of the purchase price are based upon a valuation of assets and liabilities acquired. Assets acquired and liabilities assumed are recorded at their estimated fair values as of the acquisition date. The fair values of intangible assets are based on valuations using an income approach, with estimates and assumptions provided by management of the acquired companies and the Company. Goodwill and indefinite-lived intangibles are not amortized but are assessed for impairment at least annually to ensure their current fair values exceed their carrying values.

The Company’s most significant intangible assets are patents and acquired technologies, customer relationships, trademarks and trade names. All definite-lived intangible assets are amortized over the periods in which their economic benefits are expected to be realized. The Company reviews the useful life assumptions, including the classification of certain intangible assets as “indefinite-lived”, on a periodic basis to determine if changes in circumstances warrant revisions to them.

The Company’s product lines generally correspond with its reporting units which is the level at which the Company evaluates its goodwill, intangible assets and other long-lived assets for impairment.

Impairment Charges

Impairment Charges

Impairment analyses of goodwill and indefinite-lived intangible assets are conducted in accordance with ASC 350, “Intangibles—Goodwill and Other”. This guidance specifies that goodwill and other intangible assets must be periodically tested for impairment. The Company tests its goodwill balances annually as of the beginning of the second quarter or more frequently if indicators are present or changes in circumstances suggest that an impairment may exist. The Company utilizes a quantitative analysis to test goodwill for impairment. This two-step approach requires a comparison of the carrying value of each of the Company’s reporting units to the fair value of these reporting units. The fair value of a reporting unit is primarily based on a discounted cash flow (“DCF”) method with a weighted average cost of capital. If the carrying value of a reporting unit exceeds its fair value, the Company calculates the implied fair value of the reporting unit’s goodwill and compares it to the goodwill’s carrying value. If the carrying value of the goodwill exceeds its implied fair value, an impairment charge is recorded for the difference.

The Company assesses indefinite-lived intangible assets for impairment on an annual basis as of the beginning of the second quarter, and more frequently if indicators are present or changes in circumstances suggest that an impairment may exist. The Company will also reassess the continuing classification of these indefinite-lived intangible assets as indefinite-lived when circumstances change such that the useful life may no longer be indefinite. The fair values of the Company’s indefinite-lived intangible assets are determined using the relief from royalty method, based on forecasted revenues. If the fair value of an indefinite-lived intangible asset is less than its carrying value, an impairment charge is recorded for the difference between the carrying value and the fair value of the impaired asset.

The carrying amounts of definite-lived long-lived assets are reviewed for impairment whenever changes in events or circumstances indicate that their carrying values may not be recoverable. The recoverability of carrying value is generally determined by comparison of the asset group’s carrying value to its undiscounted future cash flows. When this test indicates the potential for impairment, a fair value assessment is performed. Once an impairment is determined and measured, an impairment charge is recorded for the difference between the carrying value and the fair value of the impaired asset.

Revenue Recognition

Revenue Recognition

The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred, price is fixed or determinable, and collection of the resulting receivable is reasonably assured. Revenue recognition requires judgment and estimates, which may affect the amount and timing of revenue recognized in any given period.

The Company’s revenue transactions are comprised of both single-element and multiple-element transactions. Multiple-element transactions may include two or more products and occasionally non-standard/extended warranties, or preventative maintenance plans. For multiple-element transactions, revenue is generally recognized upon shipment, using the relative selling price method in accordance with ASC 605-25 “Revenue – Multiple-Element Arrangements”. Single-element transactions are typically recognized upon shipment at their contractually stated prices.

The Company generally provides warranties for its products. The standard warranty period is typically 12 months to 24 months for the Laser Products and Precision Motion segments and 12 months to 36 months for the Vision Technologies segment. The standard warranty period for product sales is accounted for under the provisions of ASC 450 “Contingencies,” as the Company has the ability to ascertain the likelihood of the liability, and can estimate the amount of the liability. A provision for the estimated cost related to warranty is recorded to cost of revenue at the time revenue is recognized. The Company’s estimate of costs to service the warranty obligations is based on historical experience and expectations of future conditions. To the extent the Company experiences warranty claims or costs associated with servicing those claims that differ from the original estimates, revisions to the estimated warranty liability are recorded at that time.

The Company occasionally sells optional non-standard/extended warranty services and preventative maintenance contracts to customers. The Company accounts for these agreements in accordance with provisions of ASC 605-20-25-3, “Separately Priced Extended Warranty and Product Maintenance Contracts,” under which it recognizes the separately priced extended warranty and preventative maintenance fees ratably over the associated period.

The Company, at the request of its customers, may perform professional services, generally for the maintenance and repair of products previously sold to those customers. These services are usually in the form of time and materials based contracts which are short in duration. Revenue for time and materials services is recorded at the completion of services requested under a customer’s purchase order.

Research and Development and Engineering Costs

Research and Development and Engineering Costs

Research and development and engineering (“R&D”) expenses are primarily comprised of employee related expenses and cost of materials for R&D projects. These costs are expensed as incurred.

Share-Based Compensation

Share-Based Compensation

The Company records the expense associated with share-based compensation awards to employees and directors based on the fair value of awards as of the grant date. For stock-based compensation awards that vest over time based on employment, the associated expenses are recognized in the consolidated statements of operations ratably over the vesting period of the award, net of estimated forfeitures. For performance-based restricted stock units, stock-based compensation expenses are recognized ratably over the vesting period when it is probable that the performance targets are expected to be achieved based on management’s projections. Management’s projections are revised, if necessary, in subsequent periods when underlying factors change the evaluation of the probability of achieving the performance targets. Accordingly, share-based compensation expense associated with performance-based restricted stock units may differ significantly from period to period based on changes to the probability of achieving performance targets.

Shipping & Handling Costs

Shipping & Handling Costs

Shipping and handling costs are recorded in cost of revenue.

Advertising Costs

Advertising Costs

Advertising costs are expensed to selling, general and administrative expenses as incurred and were not material for 2015, 2014 and 2013.

Restructuring, Acquisition and Divestiture Related Costs

Restructuring, Acquisition and Divestiture Related Costs

The Company accounted for its restructuring activities in accordance with the provisions of ASC 420, “Exit or Disposal Cost Obligations.” The Company makes assumptions related to the amounts of employee severance benefits and related costs, the time period over which facilities will remain vacant, useful lives and residual value of long-lived assets, sublease terms, sublease rates and discount rates. Estimates and assumptions are based on the best information available at the time the obligation is recognized. These estimates are reviewed and revised as facts and circumstances dictate.

Acquisition related costs incurred to effect a business combination, including finders’ fees, legal, valuation and other professional or consulting fees, are expensed as incurred. Acquisition related costs also include expenses recognized under earn-out agreements in connection with acquisitions. Expenses associated with divestiture activities, including legal and professional fees directly related to the completion of a business divestiture, are expensed as incurred.

Accounting for Income Taxes

Accounting for Income Taxes

The asset and liability method is used to account for income taxes. Under the asset and liability method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to temporary differences between the financial statement carrying amounts of assets and liabilities and their respective tax bases. This method also requires the recognition of future tax benefits, such as net operating loss carryforwards, to the extent that it is more likely than not that such benefits will be realized. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which the temporary differences are expected to be recovered or settled. A valuation allowance is established to reduce the deferred tax assets if it is more likely than not that some or all of the related tax benefits will not be realized in the future and is reassessed periodically to determine whether it is more likely than not that the tax benefits will be realized in the future and that such valuation should be released.

The majority of the Company’s business activities are conducted through its subsidiaries outside of Canada. Earnings from these subsidiaries are generally indefinitely reinvested in the local businesses. Further, local laws and regulations may also restrict certain subsidiaries from paying dividends to their parents. As such, the Company generally does not accrue income taxes for the repatriation of such earnings in accordance with ASC 740, “Income Taxes.” To the extent that there are excess accumulated earnings that the Company intends to repatriate from any such subsidiaries, the Company recognizes deferred tax liabilities on such foreign earnings.

The Company assesses its income tax positions and records tax benefits for all years subject to examination based on the evaluation of the facts, circumstances, and information available at each reporting date. For those tax positions with a greater than 50 percent likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information, the Company records a tax benefit. For those income tax positions that are not likely to be sustained, no tax benefit is recognized in the consolidated financial statements. The Company recognizes interest and penalties related to uncertain tax positions as part of the provision for income taxes.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity

In April 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity.” ASU 2014-08 provides guidance on determining when disposals can be presented as discontinued operations. ASU 2014-08 requires that only disposals representing a strategic shift that has (or will have) a major effect on an entity’s operations and financial results should be presented as discontinued operations. A strategic shift may include a disposal of a major line of business, a major equity method investment or a major part of an entity. Additionally, ASU 2014-08 requires expanded disclosures regarding discontinued operations. ASU 2014-08 is effective prospectively for reporting periods beginning after December 15, 2014. The Company adopted this pronouncement in January 2015.

Simplifying the Presentation of Debt Issuance Costs

In April 2015, the FASB issued ASU 2015-03, “Simplifying the Presentation of Debt Issuance Costs.” ASU 2015-03 requires debt issuance related costs to be presented in the balance sheet as a direct reduction to the carrying amount of the associated debt liability, consistent with the presentation of a debt discount. The Company adopted the provisions of ASU 2015-03 retrospectively as of the fiscal quarter ended October 2, 2015. Prior period amounts have been reclassified to conform to the current period presentation. As of December 31, 2014, $0.2 million of debt issuance costs were reclassified from prepaid expenses and other current assets to current portion of long-term debt and $2.5 million was reclassified from other long-term assets to long-term debt in the consolidated balance sheet. Other than these reclassifications, the adoption of ASU 2015-03 did not have an impact on the Company’s consolidated financial statements.

Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement

In April 2015, the FASB issued ASU 2015-05, “Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement,” which provides guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. ASU 2015-05 will be effective for annual and interim reporting periods beginning after December 15, 2015, with early adoption permitted. Upon adoption, an entity may apply the new guidance either retrospectively or prospectively to all arrangements entered into or materially modified after the effective date. The Company does not expect the adoption of ASU 2015-05 to have a material impact on the Company’s consolidated financial statements.

Business Combinations

In September 2015, the FASB issued ASU 2015-16, “Business Combinations,” which requires an acquirer to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 requires an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment had been recognized at the acquisition date. ASU 2015-16 will be effective prospectively for reporting periods beginning after December 15, 2015. The Company does not expect the adoption of ASU 2015-06 to have a material impact on the Company’s consolidated financial statements.

Balance Sheet Classification of Deferred Taxes

In November 2015, the FASB issued ASU 2015-17, “Income Taxes – Balance Sheet Classification of Deferred Taxes,” which simplifies the presentation of deferred income taxes. Under the new standard, both deferred tax assets and liabilities are required to be classified as noncurrent in a classified balance sheet. ASU 2015-17 will become effective for annual and interim reporting periods beginning after December 15, 2016, with early adoption allowed. The Company elected to early adopt the provisions of ASU 2015-17 using the prospective method and reported both current and noncurrent deferred tax assets and liabilities as noncurrent on the accompanying consolidated balance sheet as of December 31, 2015. The prior year balances were not retrospectively adjusted.

Leases

In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842),” which provides comprehensive lease accounting guidance.  The standard requires entities to recognize lease assets and liabilities on the balance sheet and to disclose key information about leasing arrangements.   ASU 2016-02 will become effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption allowed.  The Company is currently evaluating the impact of the new guidance on our consolidated financial statements.

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers,” which provides guidance for revenue recognition. ASU 2014-09 supersedes the revenue recognition requirements in ASC 605, “Revenue Recognition,” and requires entities to recognize revenue in a way that depicts the transfer of goods or services to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 will be effective for annual and interim reporting periods beginning after December 15, 2016. Early adoption is not permitted. Upon adoption, an entity may apply the new guidance either retrospectively to each prior reporting period presented or retrospectively only to customer contracts not yet completed as of the date of adoption with the cumulative effect of initially applying the standard recognized in beginning retained earnings at the date of the initial application. In August 2015, the FASB issued ASU 2015-14, “Revenue from Contracts with Customers – Deferral of the Effective Date,” which defers the effective date of ASU 2014-09 by one year, with the option of early adoption as of the original effective date. The amendment in ASU 2015-14 will result in ASU 2014-09 being effective for annual and interim reporting periods beginning after December 15, 2017. The Company is currently evaluating the impact of the new standard on the Company’s consolidated financial statements.

Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern

In August 2014, the FASB issued ASU 2014-15, "Presentation of Financial Statements - Going Concern (Subtopic 205-40)," which requires management to assess a company’s ability to continue as a going concern and to provide related footnote disclosures in certain circumstances. ASU 2014-15 will be effective for annual reporting periods ending after December 15, 2016. Early application is permitted. The Company does not expect the adoption of ASU 2014-15 to have an impact on the Company’s consolidated financial statements.

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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Changes in Allowance for Doubtful Accounts

For the years ended December 31, 2015, 2014 and 2013, changes in the allowance for doubtful accounts were as follows (in thousands):

	2015			2014			2013
Balance at beginning of year	$	282		$	575		$	294
Provision charged to selling, general and administrative expenses		285			30			301
Allowance resulting from acquisitions		5			52			117
Write-offs, net of recoveries of amounts previously reserved		(29	)		(352	)		(159	)
Divestiture of JK Lasers		(30	)		—			—
Exchange rate changes		(13	)		(23	)		22
Balance at end of year	$	500		$	282		$	575

Laser Quantum

Summary of Financial Information of Laser Quantum - Income Statement

The summarized financial information for Laser Quantum is as follows (in thousands):

	Year Ended December 31,
	2015		2014		2013
Revenue	$	25,599	$	23,013	$	16,269
Income from operations	$	7,362	$	7,434	$	4,720
Net income	$	6,925	$	6,627	$	3,745

Summary of Financial Information of Laser Quantum - Balance Sheet

	December 31,
	2015		2014
Total assets (1)	$	30,159	$	25,423
Total liabilities	$	2,552	$	2,482

(1) Total assets at December 31, 2015 and 2014 included cash and cash equivalent of $21.0 million and $17.1 million, respectively.

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Business Combinations (Tables)

12 Months Ended

Dec. 31, 2015

Skyetek, Lincoln Laser and Applimotion

Summary of Fair Values of Assets Acquired and Liabilities Assumed Purchase Price Allocation

The purchase price for Skyetek, Lincoln Laser and Applimotion was allocated as follows (in thousands):

	Amount
Cash	$	331
Accounts receivable		3,166
Inventory		3,544
Prepaid expenses and other current assets		148
Property and equipment		3,220
Intangible assets		11,370
Goodwill		12,710
Other assets		10
Total assets acquired		34,499
Accounts payable		1,681
Other liabilities		1,197
Deferred tax liabilities		2,308
Total liabilities assumed		5,186
Total assets acquired, net of liabilities assumed		29,313
Less: cash acquired		331
Plus: working capital adjustments		464
Total purchase price, net of cash acquired		29,446
Less: contingent consideration		3,459
Net cash used for acquisition of businesses	$	25,987

Fair Value of Intangible Assets

The fair value of intangible assets for Skyetek, Lincoln Laser and Applimotion is comprised of the following (dollar amounts in thousands):

			Weighted Average
	Estimated Fair		Amortization
	Value		Period
Customer relationships	$	4,266	12 years
Developed technology		4,993	10 years
Trademarks and trade names		593	9 years
Non-compete covenant		684	4 years
Backlog		834	1 year
Total	$	11,370

JADAK Acquisition

Summary of Fair Values of Assets Acquired and Liabilities Assumed Purchase Price Allocation

The final purchase price allocation is as follows (in thousands):

	Amount
Cash	$	1,140
Accounts receivable		7,907
Inventory		6,865
Property and equipment		904
Intangible assets		40,250
Goodwill		44,584
Other assets		2,064
Total assets acquired		103,714
Accounts payable		3,057
Other liabilities		2,380
Deferred tax liabilities		3,481
Total liabilities assumed		8,918
Total assets acquired and liabilities assumed		94,796
Less: cash acquired		1,140
Total purchase price, net of cash acquired	$	93,656

Fair Value of Intangible Assets

The fair value of JADAK intangible assets is comprised of the following (in thousands):

			Weighted Average
	Estimated Fair		Amortization
	Value		Period
Customer relationships	$	23,570	20 years
Developed technology		10,910	10 years
Trademarks and trade names		2,130	10 years
Backlog		1,810	1 year
Non-compete covenant		1,830	5 years
Total	$	40,250

Pro forma Financial Information

The following unaudited pro forma information presents the combined financial results for the Company and JADAK as if the acquisition of JADAK had been completed as of January 1, 2013 (in thousands, except per share information):

	Year Ended December 31,
	2014			2013
Revenue	$	375,737		$	370,462
Income (loss) from continuing operations	$	(16,067	)	$	11,900
Earnings per share from continuing operations - Basic	$	(0.47	)	$	0.35
Earnings per share from continuing operations - Diluted	$	(0.47	)	$	0.35

NDS Acquisition

Summary of Fair Values of Assets Acquired and Liabilities Assumed Purchase Price Allocation

The total final purchase price allocation for the NDS acquisition was as follows (in thousands):

	Amount
Accounts receivable	$	10,327
Inventory		14,144
Property and equipment		2,426
Intangible assets		37,817
Goodwill		21,160
Other assets		1,782
Total assets acquired		87,656
Accounts payable		4,768
Other liabilities		7,149
Deferred tax liabilities		384
Total liabilities assumed		12,301
Total purchase price	$	75,355

Fair Value of Intangible Assets

The fair value of NDS intangible assets is comprised of the following (in thousands):

			Weighted Average
	Estimated Fair		Amortization
	Value		Period
Customer relationships	$	22,294	20 years
Developed technology		6,689	10 years
Trademarks and trade names		7,565	20 years
Backlog		1,269	1 year
Total	$	37,817

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Discontinued Operations and Divestitures (Tables)

12 Months Ended

Dec. 31, 2015

Discontinued Operations And Disposal Groups [Abstract]

Components of Assets and Liabilities and Operating Results of Discontinued Operations

The major components of the assets and liabilities of discontinued operations as of December 31, 2014, respectively, were as follows (in thousands):

	2014
Accounts receivable, net	$	95
Inventories		161
Other assets		375
Assets of discontinued operations	$	631
Accounts payable	$	16
Accrued expenses and other current liabilities		74
Other liabilities		234
Liabilities of discontinued operations	$	324

The following table presents the operating results which are reported as discontinued operations in the Company’s consolidated statements of operations (in thousands):

	Year Ended December 31,
	2015			2014			2013
Revenue from discontinued operations	$	—		$	10,514		$	33,792
Loss from discontinued operations, before income tax	$	(13	)	$	(8,059	)	$	(3,361	)
Loss from discontinued operations, net of tax	$	(13	)	$	(5,607	)	$	(2,054	)
Loss on disposal of discontinued operations, net of tax	$	—		$	(1,726	)	$	(592	)

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Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Components of Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss) is as follows (in thousands):

	Total accumulated
	other			Cumulative
	comprehensive			translation				Pension
	income (loss)			adjustment				liability
Balance at December 31, 2012		(9,749	)			1,299				(11,048	)
Other comprehensive income		2,686				54				2,632
Amounts reclassified from other comprehensive income (loss) (1)		721				—				721
Balance at December 31, 2013	$	(6,342	)		$	1,353			$	(7,695	)
Other comprehensive loss		(10,488	)			(6,968	)			(3,520	)
Amounts reclassified from other comprehensive income (loss) (1)		374				—				374
Balance at December 31, 2014	$	(16,456	)		$	(5,615	)		$	(10,841	)
Other comprehensive income (loss)		(3,249	)			(4,083	)			834
Amounts reclassified from other comprehensive income (loss) (1)		875				—				875
Balance at December 31, 2015	$	(18,830	)		$	(9,698	)		$	(9,132	)

(1) The amounts reclassified from other comprehensive income (loss) were included in selling, general and administrative expenses in the consolidated statements of operations.

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Goodwill, Intangible Assets and Impairment Charges (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Changes in Goodwill

The following table summarizes changes in goodwill during the year ended December 31, 2015 (in thousands):

	December 31, 2015
Balance at beginning of year	$	90,746
Goodwill acquired from the Applimotion acquisition		7,672
Goodwill acquired from the Lincoln Laser acquisition		3,367
Goodwill acquired from the Skyetek acquisition		1,671
Balance at end of year	$	103,456

Goodwill by Reportable Segment

Goodwill by reportable segment as of December 31, 2015 is as follows (in thousands):

	Reportable Segment
	Laser Products			Vision Technologies			Precision Motion			Total
Goodwill	$	136,321		$	84,401		$	33,963		$	254,685
Accumulated impairment of goodwill		(102,461	)		(31,722	)		(17,046	)		(151,229	)
Total	$	33,860		$	52,679		$	16,917		$	103,456

Goodwill by reportable segment as of December 31, 2014 is as follows (in thousands):

	Reportable Segment
	Laser Products			Vision Technologies			Precision Motion			Total
Goodwill	$	132,954		$	82,730		$	26,291		$	241,975
Accumulated impairment of goodwill		(102,461	)		(31,722	)		(17,046	)		(151,229	)
Total	$	30,493		$	51,008		$	9,245		$	90,746

Intangible Assets

Intangible assets as of December 31, 2015 and 2014, respectively, are summarized as follows (in thousands):

	December 31, 2015
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Remaining Life (Years)
Amortizable intangible assets:
Patents and acquired technologies	$	82,821	$	(66,297	)	$	16,524		7.7
Customer relationships		67,168		(36,914	)		30,254		13.6
Customer backlog		2,644		(2,589	)		55		1.0
Non-compete covenant		2,514		(882	)		1,632		3.2
Trademarks and trade names		10,711		(5,934	)		4,777		9.1
Amortizable intangible assets		165,858		(112,616	)		53,242		11.0
Non-amortizable intangible assets:
Trade names		13,027		—			13,027
Total	$	178,885	$	(112,616	)	$	66,269

	December 31, 2014
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Remaining Life (Years)
Amortizable intangible assets:
Patents and acquired technologies	$	78,253	$	(62,010	)	$	16,243		7.5
Customer relationships		63,029		(31,531	)		31,498		14.7
Customer backlog		1,810		(1,641	)		169		0.2
Non-compete covenant		1,830		(366	)		1,464		4.2
Trademarks and trade names		10,205		(5,364	)		4,841		9.8
Amortizable intangible assets		155,127		(100,912	)		54,215		11.8
Non-amortizable intangible assets:
Trade names		13,027		—			13,027
Total	$	168,154	$	(100,912	)	$	67,242

Amortization Expense of Intangible Assets

Amortization expense is as follows (in thousands):

	Year Ended December 31,
	2015		2014		2013
Amortization expense – cost of revenue	$	4,712	$	6,143	$	5,280
Amortization expense – operating expenses		7,611		10,262		7,270
Total amortization expense	$	12,323	$	16,405	$	12,550

Estimated Future Amortization Expense

Estimated future amortization expense for each of the five succeeding years and thereafter is as follows (in thousands):

Year Ending December 31,	Cost of Revenue		Operating Expenses		Total
2016	$	3,963	$	7,498	$	11,461
2017		3,600		6,898		10,498
2018		2,080		6,306		8,386
2019		1,768		4,324		6,092
2020		1,501		2,418		3,919
Thereafter		3,612		9,274		12,886
Total	$	16,524	$	36,718	$	53,242

Results of Impairment Review

The results of the impairment review as of December 31, 2014 are summarized in the following table (in thousands):

	Pre-Impairment Net Carrying Value		Impairment Charge			Post-Impairment Net Carrying Value
Goodwill	$	110,321	$	(19,575	)	$	90,746
Intangible assets		89,109		(21,867	)		67,242
Total	$	199,430	$	(41,442	)	$	157,988

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Fair Values of Financial Assets and Liabilities

The following table summarizes the fair values of our assets and liabilities measured at fair value on a recurring basis as of December 31, 2015 (in thousands):

			Quoted Prices in				Significant Other
			Active Markets for		Significant Other		Unobservable
			Identical Assets		Observable Inputs		Inputs
	Fair Value		(Level 1)		(Level 2)		(Level 3)
Assets
Cash equivalents	$	4,657	$	4,657	$	—	$	—
Liabilities
Contingent consideration	$	3,889	$	—	$	—	$	3,889

The following table summarizes the fair values of our financial assets as of December 31, 2014 (in thousands):

			Quoted Prices in				Significant Other
			Active Markets for		Significant Other		Unobservable
			Identical Assets		Observable Inputs		Inputs
	Fair Value		(Level 1)		(Level 2)		(Level 3)
Assets
Cash equivalents	$	2,255	$	2,255	$	—	$	—

Changes in Fair Value of Level 3 Contingent Consideration

Changes in the fair value of our Level 3 contingent consideration for the year ended December 31, 2015 were as follows (in thousands):

	Contingent Consideration
Balance at December 31, 2014	$	—
Acquisition of Applimotion		965
Fair value adjustment		430
Acquisition of Lincoln Laser		2,344
Acquisition of Skyetek		150
Balance at December 31, 2015	$	3,889

Quantitative Information Associated with Fair Value Measurement of Company’s Level 3 Financial Instrument

There were no Level 3 assets or liabilities during the year ended December 31, 2014.

The following table provides quantitative information associated with the fair value measurement of the Company’s Level 3 liabilities:

Liability	December 31, 2015 Fair Value (in thousands)	Valuation Technique	Unobservable Inputs	Percentage Applied
Contingent consideration (Applimotion)	$1,395	Monte Carlo method	Historical and projected revenues for fiscal years 2015 to 2017 Revenue volatility Cost of debt WACC	N/A 87.3% 2.82% 11.1%
Contingent consideration (Lincoln Laser)	$2,344	Monte Carlo method	Projected revenues for fiscal year 2016 Revenue volatility Cost of debt WACC	N/A 37.1% 4.7% 9.8%

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Earnings (Loss) per Common Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings (Loss) Per Share

The following table sets forth the computation of basic and diluted earnings (loss) per share (in thousands, except per share amounts):

	Year Ended December 31,
	2015			2014			2013
Numerators:
Income (loss) from continuing operations	$	35,628		$	(16,909	)	$	9,977
Consolidated loss from discontinued operations		(13	)		(7,333	)		(2,646	)
Less: income attributable to noncontrolling interest		—			(10	)		(22	)
Loss from discontinued operations attributable to GSI Group Inc.		(13	)		(7,343	)		(2,668	)
Net income (loss) attributable to GSI Group Inc.	$	35,615		$	(24,252	)	$	7,309
Denominators:
Weighted average common shares outstanding— basic		34,579			34,352			34,073
Dilutive potential common shares (1)		248			—			323
Weighted average common shares outstanding— diluted		34,827			34,352			34,396
Antidilutive common shares excluded from above		—			439			246
Basic Earnings (Loss) per Common Share:
From continuing operations	$	1.03		$	(0.49	)	$	0.29
From discontinued operations	$	(0.00	)	$	(0.21	)	$	(0.08	)
Basic earnings (loss) per share attributable to GSI Group Inc.	$	1.03		$	(0.70	)	$	0.21
Diluted Earnings (Loss) per Common Share:
From continuing operations	$	1.02		$	(0.49	)	$	0.29
From discontinued operations	$	(0.00	)	$	(0.21	)	$	(0.08	)
Diluted earnings (loss) per share attributable to GSI Group Inc.	$	1.02		$	(0.70	)	$	0.21

(1) Due to the Company’s net loss position for the year ended December 31, 2014, all potentially dilutive shares were excluded as their effect would have been anti-dilutive.

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Supplementary Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2015

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Inventories

Inventories

	December 31,
	2015		2014
Raw materials	$	38,511	$	38,934
Work-in-process		10,138		9,899
Finished goods		9,266		11,945
Demo and consigned inventory		1,651		2,165
Total inventories	$	59,566	$	62,943

Property, Plant and Equipment, net

Property, Plant and Equipment, net

	December 31,
	2015			2014
Cost:
Land, buildings and improvements	$	48,154		$	46,222
Machinery and equipment		43,376			50,487
Total cost		91,530			96,709
Accumulated depreciation		(50,980	)		(56,621	)
Property, plant and equipment, net	$	40,550		$	40,088

Summary of Depreciation Expense on Property, Plant and Equipment, Including Demo Units and Assets under Capital Leases

The following table summarizes depreciation expense on property, plant and equipment, including demo units and assets under capital leases (in thousands):

	Year Ended December 31,
	2015		2014		2013
Depreciation expense	$	7,873	$	8,016	$	7,400

Summary of Total Accumulated Depreciation on Assets under Capital Leases

The following table summarizes total accumulated depreciation on assets under capital leases as of the dates indicated (in thousands):

	December 31,
	2015		2014
Accumulated depreciation on assets under capital leases	$	3,798	$	2,741

Accrued Expenses and Other Current Liabilities

The following table summarizes accrued expenses and other current liabilities as of the dates indicated (in thousands):

	December 31,
	2015		2014
Accrued compensation and benefits	$	7,357	$	7,741
Accrued warranty		3,335		3,044
Accrued restructuring		1,652		109
Accrued professional services fees and other		8,838		8,507
Total	$	21,182	$	19,401

Accrued Warranty

The following table summarizes accrued warranty activities for the periods indicated (in thousands):

	Year Ended December 31,
	2015			2014
Balance at beginning of year	$	3,044		$	3,315
Provision charged to cost of revenue		2,025			1,684
Acquisition related warranty accrual		132			90
Use of provision		(1,454	)		(2,003	)
Divestiture of JK Lasers		(389	)		—
Foreign currency exchange rate changes		(23	)		(42	)
Balance at end of year	$	3,335		$	3,044

Summary of Other Long Term Liabilities

The following table summarizes other long term liabilities as of the dates indicated (in thousands):

	December 31,
	2015		2014
Capital lease obligations	$	9,173	$	9,507
Accrued pension liabilities		3,693		6,037
Accrued contingent considerations		3,889		—
Other		2,690		3,275
Total		19,445		18,819

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Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Debt

Debt consisted of the following (in thousands):

	December 31,
	2015			2014
Senior Credit Facilities – term loan	$	7,500		$	7,500
Less: unamortized debt issuance costs		(115	)		(155	)
Total current portion of long-term debt	$	7,385		$	7,345
Senior Credit Facilities – term loan	$	20,000		$	27,500
Senior Credit Facilities – revolving credit facility		70,000			80,000
Less: unamortized debt issuance costs		(1,574	)		(2,470	)
Total long-term debt	$	88,426		$	105,030
Total Senior Credit Facilities	$	95,811		$	112,375

Principal Repayments on Outstanding Term Loan

The principal on the Company’s outstanding term loan matures as follows (in thousands):

	Term Loan
2016	$	7,500
2017		20,000
Total debt repayments	$	27,500

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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Share Based Compensation Expense Recorded In Income from Continuing Operations in Statements of Operations

The table below summarizes share-based compensation expense recorded in income from continuing operations (in thousands):

	Year Ended December 31,
	2015			2014		2013
Selling, general and administrative	$	3,960		$	3,967	$	5,144
Research and development and engineering		170			196		180
Cost of revenue		257			166		118
Restructuring, acquisition and divestiture related costs		(322	)		322		125
Total share-based compensation expense	$	4,065		$	4,651	$	5,567

2010 Incentive Award Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Restricted Stock Issued and Outstanding

The table below summarizes activities relating to restricted and deferred stock units issued and outstanding under the Amended and Restated 2010 Incentive Plan during the year ended December 31, 2015:

	Restricted and Deferred Stock Units (In thousands)			Weighted Average Grant Date Fair Value		Weighted Average Remaining Vesting Period (in years)	Aggregate Intrinsic Value (1) (In thousands)
Unvested at December 31, 2014		749		$	10.80
Granted		345		$	13.46
Vested		(428	)	$	10.73
Forfeited		(47	)	$	11.11
Unvested at December 31, 2015		619		$	12.32	0.88 years	$	8,429
Expected to vest as of December 31, 2015		605		$	12.31	0.88 years	$	8,243

(1) The aggregate intrinsic value is calculated based on the fair value of $13.62 per share of the Company’s common stock on December 31, 2015 due to the fact that the restricted stock units carry a $0 purchase price.

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Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2015

Compensation And Retirement Disclosure [Abstract]

Net Periodic Pension Cost

The net periodic pension cost included the following components (in thousands):

	Year Ended December 31,
	2015			2014			2013
Components of the net periodic pension cost:
Interest cost	$	1,340		$	1,589		$	1,403
Expected return on plan assets		(1,844	)		(1,958	)		(1,595	)
Amortization of actuarial losses		875			374			668
Net periodic pension cost	$	371		$	5		$	476

Actuarial Assumptions used to Compute net Periodic Pension Cost and Funded Status for U.K. Plan

The actuarial assumptions used to compute the net periodic pension cost for the years ended December 31, 2015, 2014 and 2013, respectively, for the U.K. Plan were as follows:

	Year Ended December 31,
	2015			2014			2013
Weighted-average discount rate		3.5	%		4.6	%		4.3	%
Weighted-average long-term rate of return on plan assets		5.6	%		5.9	%		5.7	%

The actuarial assumptions used to compute the funded status of the U.K. Plan as of December 31, 2015 and 2014, respectively,  were as follows:

	December 31,
	2015			2014
Weighted-average discount rate		3.8	%		3.5	%
Rate of inflation		2.8	%		2.7	%

Reconciliation of Benefit Obligations and Plan Assets of U.K. Plan

The following table provides a reconciliation of benefit obligations and plan assets of the U.K. Plan (in thousands):

	December 31,
	2015			2014
Change in benefit obligation:
Projected benefit obligation at beginning of year	$	39,421		$	35,193
Interest cost		1,340			1,589
Actuarial (gains) losses		(2,083	)		6,060
Benefits paid		(798	)		(1,006	)
Foreign currency exchange rate changes		(1,966	)		(2,415	)
Projected benefit obligation at end of year	$	35,914		$	39,421
Accumulated benefit obligation at end of year	$	35,914		$	39,421
Change in plan assets:
Fair value of plan assets at beginning of year	$	33,610		$	33,457
Actual return on plan assets		342			2,234
Employer contributions		955			1,000
Benefits paid		(798	)		(1,006	)
Foreign currency exchange rate changes		(1,735	)		(2,075	)
Fair value of plan assets at end of year	$	32,374		$	33,610
Funded status at end of year	$	(3,540	)	$	(5,811	)
Amounts included in accumulated other comprehensive loss not yet recognized in net periodic pension cost:
Net actuarial loss	$	(9,874	)	$	(11,890	)
Amounts expected to be amortized from accumulated other comprehensive loss into net periodic pension cost over the next fiscal year consists of:
Net actuarial loss	$	794		$	892

The funded status of the U.K. Plan is included in other long term liabilities in the accompanying consolidated balance sheets.

Expected Future Benefit Payments

The following table reflects the total expected benefit payments to plan participants and have been estimated based on the same assumptions used to measure the Company’s benefit obligations as of December 31, 2015 (in thousands):

	Amount
2016	$	941
2017		1,043
2018		868
2019		1,244
2020		1,428
2021-2025		8,135
Total	$	13,659

Summary of Fair Value of Plan Assets by Asset Category

The following table summarizes the fair values of Plan assets by asset category as of December 31, 2015 (in thousands):

Asset Category	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)
Mutual Funds:
Balanced (1)	$	15,611	$	—	$	15,611	$	—
Growth (2)		16,583		—		16,583		—
Cash		180		180		—		—
Total	$	32,374	$	180	$	32,194	$	—

(1) This class comprises a diversified portfolio of global investments which seeks a balanced return between capital growth and fixed income and is allocated on a weighted average basis as follows: equities (52%), bonds (24%), other assets (9%) and cash (15%).

(2) This class comprises a diversified portfolio of global investments which seeks long-term capital growth and is allocated on a weighted average basis as follows: equities (67%), bonds (12%), other assets (9%) and cash (12%).

The following table summarizes the fair values of Plan assets by asset category as of December 31, 2014 (in thousands):

Asset Category	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)
Mutual Funds:
Balanced (1)	$	16,287	$	—	$	16,287	$	—
Growth (2)		17,149		—		17,149		—
Cash		174		174		—		—
Total	$	33,610	$	174	$	33,436	$	—

(1) This class comprises a diversified portfolio of global investments which seeks a balanced return between capital growth and fixed income and is allocated on a weighted average basis as follows: equities (54%), bonds (32%), other assets (5%) and cash (9%).

(2) This class comprises a diversified portfolio of global investments which seeks long-term capital growth and is allocated on a weighted average basis as follows: equities (67%), other assets (15%), bonds (8%), and cash (10%).

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Components of Income (Loss) from Continuing Operations

Components of the Company’s income (loss) from continuing operations before income taxes are as follows (in thousands):

	Year Ended December 31,
	2015			2014			2013
Income (loss) from continuing operations before income taxes:
Canadian	$	(1,674	)	$	(20,212	)	$	(5,366	)
U.S.		23,298			(9,661	)		12,838
Other		24,398			11,958			8,705
Total	$	46,022		$	(17,915	)	$	16,177

Components of Income Tax Provision (Benefit)

Components of the Company’s income tax provision (benefit) are as follows (in thousands):

	Year Ended December 31,
	2015			2014			2013
Current
Canadian	$	96		$	175		$	—
U.S.		8,136			3,615			1,662
Other		3,854			1,940			652
		12,086			5,730			2,314
Deferred
Canadian		—			—			—
U.S.		(3,239	)		(6,731	)		2,206
Other		1,547			(5	)		1,680
		(1,692	)		(6,736	)		3,886
Total	$	10,394		$	(1,006	)	$	6,200

Reconciliation of Statutory Canadian Tax rate to Effective Tax Rate

The reconciliation of the statutory Canadian tax rate to the effective tax rate related to income before income taxes from continuing operations is as follows (in thousands, except percentage data):

	Year Ended December 31,
	2015			2014			2013
Statutory Canadian tax rate		27.00	%		27.00	%		26.00	%
Expected income tax provision at Canadian statutory tax rate	$	12,426		$	(4,837	)	$	4,206
International tax rate differences		304			(1,132	)		156
State income taxes, net		453			(271	)		148
Withholding and other taxes		680			421			321
Permanent differences		1,130			486			106
Section 199 deduction		(1,188	)		(574	)		—
Change in valuation allowance		(612	)		4,809			(3,076	)
Provision to return differences		(617	)		962			(312	)
Tax credits		(990	)		(1,678	)		(938	)
Net operating loss expirations		—			—			4,538
Statutory tax rate change		95			(13	)		354
Uncertain tax positions		121			134			259
IRS audit		(748	)		241			680
JK Lasers divestiture		(1,432	)		—			—
Goodwill impairment		—			330			—
Other		772			116			(242	)
Reported income tax provision (benefit)	$	10,394		$	(1,006	)	$	6,200
Effective tax rate		22.6	%		5.6	%		38.3	%

Significant Components of Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities as of December 31, 2015 and 2014 are as follows (in thousands):

	December 31,
	2015			2014
Deferred tax assets:
Losses & IRC Section 163(j) carryforwards	$	9,985		$	12,742
Compensation related deductions		2,915			3,749
Tax credits		2,409			3,502
Restructuring related liabilities		294			64
Inventory		4,415			4,495
Depreciation		503			683
Amortization		3,205			—
Warranty		1,127			876
Other		1,281			2,206
Total deferred tax assets		26,134			28,317
Valuation allowance for deferred tax assets		(12,537	)		(14,495	)
Net deferred tax assets	$	13,597		$	13,822
Deferred tax liabilities:
Equity investment	$	(1,733	)	$	(1,594	)
Depreciation		—			(341	)
Amortization		(2,791	)		(36	)
Unrealized currency gain/loss		(1,292	)		(2,595	)
Other		(345	)		(525	)
Total deferred tax liabilities	$	(6,161	)	$	(5,091	)
Net deferred income tax assets (liabilities)	$	7,436		$	8,731

Reconciliation of Total Amounts of Unrecognized Tax Benefits

The reconciliation of the total amounts of unrecognized tax benefits is as follows (in thousands):

Balance at December 31, 2012	$	7,554
Additions based on tax positions related to the current year		508
Additions for tax positions of prior years		1,475
Reductions for tax positions of prior years		(1,888	)
Reductions to tax positions resulting from a lapse of the applicable statute of limitations		(575	)
Balance at December 31, 2013		7,074
Additions based on tax positions related to the current year		1,180
Additions for tax positions of prior years		2,601
Reductions for tax positions of prior years		(2,404	)
Reductions to tax positions resulting from a lapse of the applicable statute of limitations		(2,177	)
Balance at December 31, 2014		6,274
Additions based on tax positions related to the current year		752
Additions for tax positions of prior years		78
Reductions for tax positions of prior years		(626	)
Reductions to tax positions resulting from a lapse of the applicable statute of limitations		(226	)
Settlements with tax authorities		(762	)
Balance at December 31, 2015	$	5,490

Income Tax Returns to be Reviewed

The Company’s income tax returns may be reviewed by tax authorities in the following countries for the following periods under the appropriate statute of limitations:

United States	2009 -  Present
Canada	2010 -  Present
United Kingdom	2014 -  Present
Germany	2008 -  Present
Netherlands	2010 -  Present
China	2012 -  Present
Japan	2011 -  Present

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Restructuring, Acquisition and Divestiture Related Costs (Tables)

12 Months Ended

Dec. 31, 2015

Restructuring And Related Activities [Abstract]

Schedule Of Restructuring And Related Cost

The following table summarizes restructuring, acquisition and divestiture related costs recorded in the accompanying consolidated statements of operations (in thousands):

	Year Ended December 31,
	2015		2014		2013
2016 restructuring	$	3,148	$	—	$	—
2015 restructuring		1,484		—		—
2013 restructuring		—		25		2,463
2011 restructuring		1,208		389		1,287
Germany restructuring		—		—		7
Total restructuring charges	$	5,840	$	414	$	3,757
Acquisition and related charges	$	1,301	$	1,521	$	1,630
Divestiture related charges		1,113		—		—
Total acquisition and divestiture related charges	$	2,414	$	1,521	$	1,630
Total restructuring, acquisition and divestiture related costs	$	8,254	$	1,935	$	5,387

Summary of Restructuring Costs for Each Segment and Unallocated Corporate Costs

The following table summarizes restructuring costs associated with the 2016 restructuring program for each segment and unallocated corporate costs for the year ended December 31, 2015 (in thousands):

	Year Ended
	December 31, 2015		Expected Cumulative Costs
Laser Products	$	55	$300  ̶  $400
Vision Technologies		2,200	3,200  ̶  3,700
Precision Motion		833	700  ̶  1,000
Unallocated Corporate and Shared Services		60		300  ̶  400
Total	$	3,148	$4,500   ̶  $5,500

The following table summarizes the total costs for each segment and unallocated corporate costs related to the 2015 restructuring plan (in thousands):

	Year Ended
	December 31, 2015
Laser Products	$	542
Vision Technologies		525
Precision Motion		79
Unallocated Corporate and Shared Services		338
Total	$	1,484

The following table summarizes restructuring costs for each segment and unallocated corporate costs related to the 2013 restructuring program (in thousands):

	Year Ended
	December 31, 2013
Laser Products	$	836
Vision Technologies		806
Precision Motion		378
Unallocated Corporate and Shared Services		443
Total	$	2,463

The following table summarizes restructuring costs for each segment and unallocated corporate costs related to the 2011 restructuring plan (in thousands):

								Cumulative
	Year Ended December 31,							Costs as of
	2015		2014			2013		December 31, 2015
Laser Products	$	—	$	(106	)	$	1,042	$	1,939
Vision Technologies		—		—			48		48
Precision Motion		—		—			5		122
Unallocated Corporate and Shared Services		1,208		495			192		3,153
Total	$	1,208	$	389		$	1,287	$	5,262

Actual Cash Charges and Non-Cash Charges of the Restructuring Plan

Presented below are actual cash charges, including severance, relocation, facility closure and consulting costs, and non-cash charges for depreciation related to the 2011 restructuring plan (in thousands):

								Cumulative
	Year Ended December 31,							Costs as of
	2015		2014			2013		December 31, 2015
Cash charges	$	126	$	(235	)	$	1,037	$	3,174
Non-cash charges		1,082		624			250		2,088
Total restructuring costs	$	1,208	$	389		$	1,287	$	5,262

Summary of Accrual Activities by Components Related to Company's Restructuring Plans

The following table summarizes the accrual activities, by component, related to the Company’s restructuring charges recorded in the accompanying consolidated balance sheets (in thousands):

	Total			Severance			Facility			Depreciation			Other
Balance at December 31, 2013	$	1,374		$	687		$	648		$	—		$	39
Restructuring charges		414			(83	)		(247	)		624			120
Cash payments		(933	)		(502	)		(293	)		—			(138	)
Non-cash write-offs and other adjustments		(624	)		—			—			(624	)		—
Balance at December 31, 2014		231			102			108			—			21
Restructuring charges		5,840			3,918			441			1,082			399
Cash payments		(3,126	)		(2,668	)		(156	)		—			(302	)
Non-cash write-offs and other adjustments		(1,063	)		6			13			(1,082	)		—
Balance at December 31, 2015	$	1,882		$	1,358		$	406		$	—		$	118

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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments And Contingencies Disclosure [Abstract]

Future Minimum Lease Payments Under Operating and Capital Leases

     As of December 31, 2015 and 2014, the Company has gross assets under capital lease of $13.2 and $12.7 million, respectively.  

  Future Lease Payments

     Future minimum lease payments under operating and capital leases expiring subsequent to December 31, 2015, including operating leases associated with facilities that have been vacated as a result of the Company’s restructuring actions, are as follows (in thousands):

Year Ending December 31,	Operating Lease		Capital Lease(1)
2016	$	4,973	$	1,498
2017		3,536		1,398
2018		2,723		968
2019		1,735		935
2020		154		907
Thereafter		5,361		8,139
Total minimum lease payments	$	18,482	$	13,845

(1) Capital lease payments include interest payments of $3.8 million.

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Segment Information (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Revenue, Gross Profit, Operating Income (Loss) from Continuing Operations, Depreciation and Amortization, Accounts Receivable and Inventory by Reportable Segments

Revenue, gross profit, operating income (loss) from continuing operations, depreciation and amortization, accounts receivable and inventory by reportable segments are as follows (in thousands):

	Year Ended December 31,
	2015		2014		2013
Revenue
Laser Products	$	168,331	$	177,726	$	166,598
Vision Technologies		124,725		122,187		90,276
Precision Motion		80,542		64,793		60,036
Total	$	373,598	$	364,706	$	316,910

	Year Ended December 31,
	2015			2014			2013
Gross Profit
Laser Products	$	73,602		$	74,224		$	68,819
Vision Technologies		48,966			48,678			35,824
Precision Motion		36,709			28,333			27,778
Unallocated Corporate and Shared Services		(1,387	)		(1,068	)		(194	)
Total	$	157,890		$	150,167		$	132,227

	Year Ended December 31,
	2015			2014			2013
Operating Income (Loss) from Continuing Operations
Laser Products	$	35,971		$	33,053		$	25,143
Vision Technologies		(2,057	)		(43,079	)		3,566
Precision Motion		16,877			13,023			12,062
Unallocated Corporate and Shared Services		(21,858	)		(19,803	)		(21,325	)
Total	$	28,933		$	(16,806	)	$	19,446

	Year Ended December 31,
	2015		2014		2013
Depreciation and Amortization
Laser Products	$	6,083	$	6,481	$	6,335
Vision Technologies		8,599		13,254		8,808
Precision Motion		2,533		1,943		1,979
Unallocated Corporate and Shared Services		2,981		2,743		2,828
Total	$	20,196	$	24,421	$	19,950

	December 31,
	2015		2014
Accounts Receivable
Laser Products		21,763		24,083
Vision Technologies		21,691		18,922
Precision Motion		13,734		8,489
Total accounts receivable		57,188		51,494
Inventory
Laser Products		29,501		34,947
Vision Technologies		19,583		19,596
Precision Motion		10,482		8,400
Total inventory		59,566		62,943
Total segment assets		116,754		114,437

	December 31,
	2015		2014
Total Assets
Total segment assets		116,754		114,437
Cash and cash equivalents		59,959		51,146
Income taxes receivable		2,510		5,906
Deferred tax assets		—		5,971
Prepaid expenses and other current assets		5,989		5,081
Assets of discontinued operations		—		631
Property, plant and equipment, net		40,550		40,088
Deferred tax assets		7,885		2,912
Other assets		12,673		12,134
Intangible assets, net		66,269		67,242
Goodwill		103,456		90,746
Total	$	416,045	$	396,294

Schedule of Geographic Revenue

The Company aggregates geographic revenue based on the customer location where products are shipped. Revenue to these customers is as follows (in thousands, except percentage data):

	Year Ended December 31,
	2015					2014					2013
	Revenue		% of Total			Revenue		% of Total			Revenue		% of Total
United States	$	154,825		41.4	%	$	140,973		38.7	%	$	107,892		34.0	%
Germany		54,743		14.7			59,029		16.2			56,287		17.8
Rest of Europe		48,277		12.9			54,308		14.9			45,698		14.4
China		38,491		10.3			40,792		11.2			37,651		11.9
Rest of Asia-Pacific		62,467		16.7			58,830		16.1			57,802		18.2
Other		14,795		4.0			10,774		2.9			11,580		3.7
Total	$	373,598		100.0	%	$	364,706		100.0	%	$	316,910		100.0	%

Summary of Long-lived Assets

Long-lived assets consist of property, plant and equipment, net, and are aggregated based on the location of the assets. A summary of these long-lived assets is as follows (in thousands):

	December 31,
	2015		2014
United States	$	34,907	$	32,988
Europe		4,014		5,318
China		1,593		1,705
Asia-Pacific and other		36		77
Total	$	40,550	$	40,088

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Supplementary Information (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information

The following tables reflect the Company’s unaudited condensed consolidated statements of operations (in thousands except per share data):

	Three Months Ended
	December 31,			October 2,		July 3,			April 3,
	2015			2015		2015			2015
Revenue	$	90,219		$	92,271	$	96,494		$	94,614
Cost of revenue		53,590			52,361		55,149			54,608
Gross profit		36,629			39,910		41,345			40,006
Operating expenses:
Research and development and engineering		7,295			7,693		7,840			8,215
Selling, general and administrative		19,080			19,979		20,922			22,068
Amortization of purchased intangible assets		2,018			1,852		1,852			1,889
Restructuring, acquisition and divestiture related costs		4,022			1,379		416			2,437
Total operating expenses		32,415			30,903		31,030			34,609
Operating income from continuing operations		4,214			9,007		10,315			5,397
Interest income (expense), foreign exchange transaction gains (losses), other income (expense), net and gain on disposal of business		1,721			13		15,506			(151	)
Income from continuing operations before income taxes		5,935			9,020		25,821			5,246
Income tax provision (benefit)		(168	)		2,452		6,310			1,800
Income from continuing operations		6,103			6,568		19,511			3,446
Loss from discontinued operations, net of tax		—			—		(13	)		—
Consolidated net income	$	6,103		$	6,568	$	19,498		$	3,446
Earnings per common share from continuing operations:
Basic	$	0.18		$	0.19	$	0.56		$	0.10
Diluted	$	0.18		$	0.19	$	0.56		$	0.10
Loss per common share from discontinued operations:
Basic	$	—		$	—	$	(0.00	)	$	—
Diluted	$	—		$	—	$	(0.00	)	$	—
Earnings per common share attributable to GSI Group Inc.
Basic	$	0.18		$	0.19	$	0.56		$	0.10
Diluted	$	0.18		$	0.19	$	0.56		$	0.10

	Three Months Ended
	December 31,			September 26,			June 27,			March 28,
	2014			2014			2014			2014
Revenue	$	94,012		$	94,656		$	96,905		$	79,133
Cost of revenue		54,284			54,973			58,254			47,028
Gross profit		39,728			39,683			38,651			32,105
Operating expenses:
Research and development and engineering		7,837			7,735			7,525			5,857
Selling, general and administrative		21,840			21,512			21,410			19,618
Amortization of purchased intangible assets		2,799			2,843			2,876			1,744
Restructuring, acquisition and divestiture related costs		(14	)		771			360			818
Impairment of goodwill and intangible assets		41,442			—			—			—
Total operating expenses		73,904			32,861			32,171			28,037
Operating income (loss) from continuing operations		(34,176	)		6,822			6,480			4,068
Interest income (expense), foreign exchange transaction gains (losses) and other income (expense), net		(127	)		310			(1,017	)		(275	)
Income (loss) from continuing operations before income taxes		(34,303	)		7,132			5,463			3,793
Income tax provision (benefit)		(6,013	)		2,013			2,057			937
Income (loss) from continuing operations		(28,290	)		5,119			3,406			2,856
Loss from discontinued operations, net of tax		(790	)		(273	)		(2,678	)		(1,866	)
Loss on disposal of discontinued operations, net of tax		(1,405	)		(321	)		—			—
Consolidated net income (loss)		(30,485	)		4,525			728			990
Less: Net income attributable to noncontrolling interest		—			—			(3	)		(7	)
Net income (loss) attributable to GSI Group Inc.	$	(30,485	)	$	4,525		$	725		$	983
Earnings (loss) per common share from continuing operations:
Basic	$	(0.82	)	$	0.15		$	0.10		$	0.08
Diluted	$	(0.82	)	$	0.15		$	0.10		$	0.08
Loss per common share from discontinued operations:
Basic	$	(0.06	)	$	(0.02	)	$	(0.08	)	$	(0.05	)
Diluted	$	(0.06	)	$	(0.02	)	$	(0.08	)	$	(0.05	)
Earnings (loss) per common share attributable to GSI Group Inc.
Basic	$	(0.88	)	$	0.13		$	0.02		$	0.03
Diluted	$	(0.88	)	$	0.13		$	0.02		$	0.03

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Organization and Presentation - Additional Information (Details)	12 Months Ended
	Dec. 31, 2015
Organization And Business Activities [Line Items]
Equity method investment ownership percentage on Laser Quantum	41.00%
Ownership in joint venture, Excel Laser Technology Private Limited
Organization And Business Activities [Line Items]
Minority interest ownership percentage	50.00%
Percentage of Company's interests sold	100.00%

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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jun. 28, 2013	Mar. 29, 2013
Significant Accounting Policies [Line Items]
Earnings from equity investment	$ 2,657	$ 2,700	$ 1,469
Reclassification of debt issuance costs from other assets		200
Reclassification from other assets to long term debt		$ 2,500
Laser Quantum
Significant Accounting Policies [Line Items]
Equity method investment ownership percentage	41.00%	41.00%		41.00%	25.00%
Net investment	$ 10,100	$ 8,000
Maximum
Significant Accounting Policies [Line Items]
Cash equivalents original maturity period	3 months
Maximum | Laser Products
Significant Accounting Policies [Line Items]
Standard warranty period	24 months
Maximum | Precision Motion
Significant Accounting Policies [Line Items]
Standard warranty period	24 months
Maximum | Vision Technologies
Significant Accounting Policies [Line Items]
Standard warranty period	36 months
Maximum | Buildings and improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	30 years
Maximum | Machinery and Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	10 years
Minimum | Laser Products
Significant Accounting Policies [Line Items]
Standard warranty period	12 months
Minimum | Precision Motion
Significant Accounting Policies [Line Items]
Standard warranty period	12 months
Minimum | Vision Technologies
Significant Accounting Policies [Line Items]
Standard warranty period	12 months
Minimum | Buildings and improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	3 years
Minimum | Machinery and Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	1 year

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Summary of Financial Information of Laser Quantum - Income Statement (Details) - Laser Quantum - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Financial Statements Information [Line Items]
Revenue	$ 25,599	$ 23,013	$ 16,269
Income from operations	7,362	7,434	4,720
Net income	$ 6,925	$ 6,627	$ 3,745

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Summary of Financial Information of Laser Quantum - Balance Sheet (Details) - Laser Quantum - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Schedule Of Financial Statements Information [Line Items]
Total assets	[1]	$ 30,159	$ 25,423
Total liabilities		$ 2,552	$ 2,482

[1] Total assets at December 31, 2015 and 2014 included cash and cash equivalent of $21.0 million and $17.1 million, respectively.

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Summary of Financial Information of Laser Quantum - Balance Sheet (Details) (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Financial Statements Information [Line Items]
Cash and cash equivalents	$ 59,959	$ 51,146	$ 60,980	$ 65,788
Laser Quantum
Schedule Of Financial Statements Information [Line Items]
Cash and cash equivalents	$ 21,000	$ 17,100

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Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance For Doubtful Accounts Receivable Rollforward
Balance at beginning of year	$ 282	$ 575	$ 294
Provision charged to selling, general and administrative expenses	285	30	301
Allowance resulting from acquisitions	5	52	117
Write-offs, net of recoveries of amounts previously reserved	(29)	(352)	(159)
Divestiture of JK Lasers	(30)
Exchange rate changes	(13)	(23)	22
Balance at end of year	$ 500	$ 282	$ 575

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Business Combinations - Additional Information (Details) - USD ($)						1 Months Ended		10 Months Ended		12 Months Ended
	Dec. 18, 2015	Nov. 09, 2015	Feb. 19, 2015	Mar. 14, 2014	Jan. 15, 2013	Dec. 31, 2015	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2013
Business Acquisition [Line Items]
Future contingent consideration						$ 3,889,000		$ 3,889,000		$ 3,889,000
Goodwill						103,456,000		103,456,000	$ 90,746,000	103,456,000	$ 90,746,000
Payments to acquire businesses net of cash acquired and escrow recovery										25,987,000	88,238,000	$ 80,773,000
Recognized acquisition costs										1,301,000	1,521,000	1,630,000
Skyetek Inc.
Business Acquisition [Line Items]
Total purchase price	$ 2,800,000
Net cash used for acquisition of business	2,600,000
Future contingent consideration	200,000					200,000		200,000		200,000
Undiscounted range of outcomes, minimum	0
Undiscounted range of outcomes, maximum	$ 300,000
Skyetek Inc. | Maximum
Business Acquisition [Line Items]
Business combination estimated additional payment						100,000		100,000		100,000
Lincoln Laser Company
Business Acquisition [Line Items]
Total purchase price		$ 12,600,000
Net cash used for acquisition of business		10,300,000
Future contingent consideration		2,300,000
Undiscounted range of outcomes, minimum		0
Undiscounted range of outcomes, maximum		$ 6,000,000
Revenues						1,900,000
Income (loss) from continuing operations before income taxes						(300,000)
Business combination estimated additional cash receipt						500,000		500,000		500,000
Applimotion Inc.
Business Acquisition [Line Items]
Total purchase price			$ 14,000,000
Net cash used for acquisition of business			13,000,000
Future contingent consideration			1,000,000
Undiscounted range of outcomes, minimum			0
Undiscounted range of outcomes, maximum			$ 4,000,000
Revenues								14,000,000
Income (loss) from continuing operations before income taxes								1,000,000
Membership interests acquired			100.00%
Skyetek, Lincoln Laser and Applimotion
Business Acquisition [Line Items]
Total purchase price										29,446,000
Future contingent consideration						3,459,000		3,459,000		3,459,000
Goodwill						12,710,000		12,710,000		12,710,000
Intangible assets						11,370,000		11,370,000		11,370,000
Goodwill and intangible assets expected to be deductible for tax purposes						$ 10,300,000		$ 10,300,000		10,300,000
Total purchase price, net of cash acquired										25,987,000
JADAK Acquisition
Business Acquisition [Line Items]
Revenues									45,400,000
Income (loss) from continuing operations before income taxes									$ (2,700,000)
Membership interests acquired				100.00%
Goodwill				$ 44,584,000
Intangible assets				40,250,000
Goodwill and intangible assets expected to be deductible for tax purposes				61,800,000
Total purchase price, net of cash acquired				$ 93,656,000
JADAK, LLC
Business Acquisition [Line Items]
Membership interests acquired				100.00%
JADAK Technologies, Inc
Business Acquisition [Line Items]
Membership interests acquired				100.00%
Advanced Data Capture Corporation
Business Acquisition [Line Items]
Membership interests acquired				100.00%
NDS Surgical Imaging, LLC
Business Acquisition [Line Items]
Membership interests acquired					100.00%
NDS Surgical Imaging KK
Business Acquisition [Line Items]
Membership interests acquired					100.00%
NDS Acquisition
Business Acquisition [Line Items]
Net cash used for acquisition of business					$ 80,800,000
Revenues													$ 68,400,000
Income (loss) from continuing operations before income taxes													$ (3,400,000)
Goodwill					21,160,000
Intangible assets					37,817,000
Escrow after the payments of closing working capital adjustments					$ 5,400,000
Escrow recovery was accounted for as a reduction to goodwill							$ 5,400,000
Remaining escrow amount received							5,400,000
Payments to acquire businesses net of cash acquired and escrow recovery							$ 75,400,000
Skyetek, Lincoln Laser, Applimotion, JADAK and NDS
Business Acquisition [Line Items]
Recognized acquisition costs										$ 900,000	$ 700,000	$ 1,500,000

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Summary of Fair Values of Assets Acquired and Liabilities Assumed Purchase Price Allocation (Details) - USD ($) $ in Thousands		12 Months Ended
	Mar. 14, 2014	Dec. 31, 2015	Dec. 31, 2014	Jan. 15, 2013
Business Acquisition [Line Items]
Goodwill		$ 103,456	$ 90,746
Total assets acquired, net of liabilities assumed		29,313
Less: contingent consideration		3,889
Skyetek, Lincoln Laser and Applimotion
Business Acquisition [Line Items]
Cash		331
Accounts receivable		3,166
Inventory		3,544
Prepaid expenses and other current assets		148
Property and equipment		3,220
Intangible assets		11,370
Goodwill		12,710
Other assets		10
Total assets acquired		34,499
Accounts payable		1,681
Other liabilities		1,197
Deferred tax liabilities		2,308
Total liabilities assumed		5,186
Less: cash acquired		331
Plus: working capital adjustments		464
Total purchase price, net of cash acquired		29,446
Less: contingent consideration		3,459
Net cash used for acquisition of businesses		$ 25,987
JADAK Acquisition
Business Acquisition [Line Items]
Cash	$ 1,140
Accounts receivable	7,907
Inventory	6,865
Property and equipment	904
Intangible assets	40,250
Goodwill	44,584
Other assets	2,064
Total assets acquired	103,714
Accounts payable	3,057
Other liabilities	2,380
Deferred tax liabilities	3,481
Total liabilities assumed	8,918
Total assets acquired, net of liabilities assumed	94,796
Less: cash acquired	1,140
Net cash used for acquisition of businesses	$ 93,656
NDS Acquisition
Business Acquisition [Line Items]
Accounts receivable				$ 10,327
Inventory				14,144
Property and equipment				2,426
Intangible assets				37,817
Goodwill				21,160
Other assets				1,782
Total assets acquired				87,656
Accounts payable				4,768
Other liabilities				7,149
Deferred tax liabilities				384
Total liabilities assumed				12,301
Total assets acquired, net of liabilities assumed				$ 75,355

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Fair Value of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Mar. 14, 2014	Jan. 15, 2013
Skyetek, Lincoln Laser and Applimotion
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 11,370
Skyetek, Lincoln Laser and Applimotion | Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 4,266
Amortization Period of intangible assets	12 years
Skyetek, Lincoln Laser and Applimotion | Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 4,993
Amortization Period of intangible assets	10 years
Skyetek, Lincoln Laser and Applimotion | Trademarks and Trade Names
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 593
Amortization Period of intangible assets	9 years
Skyetek, Lincoln Laser and Applimotion | Non-compete Covenant
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 684
Amortization Period of intangible assets	4 years
Skyetek, Lincoln Laser and Applimotion | Backlog
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 834
Amortization Period of intangible assets	1 year
JADAK Acquisition
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets		$ 40,250
JADAK Acquisition | Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets		$ 23,570
Amortization Period of intangible assets		20 years
JADAK Acquisition | Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets		$ 10,910
Amortization Period of intangible assets		10 years
JADAK Acquisition | Trademarks and Trade Names
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets		$ 2,130
Amortization Period of intangible assets		10 years
JADAK Acquisition | Non-compete Covenant
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets		$ 1,830
Amortization Period of intangible assets		5 years
JADAK Acquisition | Backlog
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets		$ 1,810
Amortization Period of intangible assets		1 year
NDS Acquisition
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets			$ 37,817
NDS Acquisition | Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets			$ 22,294
Amortization Period of intangible assets			20 years
NDS Acquisition | Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets			$ 6,689
Amortization Period of intangible assets			10 years
NDS Acquisition | Trademarks and Trade Names
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets			$ 7,565
Amortization Period of intangible assets			20 years
NDS Acquisition | Backlog
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets			$ 1,269
Amortization Period of intangible assets			1 year

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Unaudited Pro forma Information (Details) - JADAK Acquisition - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Revenue	$ 375,737	$ 370,462
Income (loss) from continuing operations	$ (16,067)	$ 11,900
Earnings per share from continuing operations - Basic	$ (0.47)	$ 0.35
Earnings per share from continuing operations - Diluted	$ (0.47)	$ 0.35

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Discontinued Operations and Divestitures - Additional Information (Details) - USD ($)		1 Months Ended							3 Months Ended		12 Months Ended
	Apr. 15, 2015	Jan. 31, 2016	Apr. 30, 2015	Jul. 31, 2014	Sep. 30, 2013	Sep. 27, 2013	May. 31, 2013	Oct. 31, 2012	Dec. 31, 2014	Sep. 26, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of transaction costs											$ 29,570,000
Gain (Loss) on sale of business, net of tax									$ (1,405,000)	$ (321,000)		$ (1,726,000)	$ (592,000)
Assets of discontinued operations									631,000		0	631,000
Liabilities of discontinued operations									$ 324,000		0	324,000
Semiconductor Systems
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of transaction costs							$ 9,700,000
Gain (Loss) on sale of business, net of tax													$ (400,000)
Settlement of closing working capital adjustments					$ 1,700,000
Laser Systems
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of transaction costs								$ 7,000,000
Gain (Loss) on sale of business, net of tax						$ (200,000)								$ 2,300,000
Settlement of closing working capital adjustments					$ (400,000)
JK Lasers Business
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of transaction costs	$ 29,600,000		$ 29,600,000
Pre-tax gain (loss) on sale of business			$ 19,600,000
Gain (Loss) on sale of business, net of tax	$ 19,600,000
Excel Laser Technology Private Limited
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Minority interest ownership percentage															50.00%
Discontinued Operation, Provision for Loss (Gain) on Disposal, before Income Tax												500,000
Ownership in joint venture, Excel Laser Technology Private Limited | Maximum
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on sale of business											$ (100,000)
Scientific Lasers Business
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of transaction costs				$ 6,500,000
Gain (Loss) on sale of business, net of tax												(1,700,000)
Sale proceeds held in escrow				$ 1,500,000
Sale proceeds held in escrow, Period											2016-01
Discontinued Operation, Provision for Loss (Gain) on Disposal, before Income Tax												$ 3,000,000
Scientific Lasers Business | Subsequent Event
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sale proceeds held in escrow		$ 1,500,000

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Components of Assets and Liabilities of discontinued operations (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Discontinued Operations And Disposal Groups [Abstract]
Accounts receivable, net		$ 95
Inventories		161
Other assets		375
Assets of discontinued operations	$ 0	631
Accounts payable		16
Accrued expenses and other current liabilities		74
Other liabilities		234
Liabilities of discontinued operations	$ 0	$ 324

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Operating Results reported as discontinued operations (Details) - USD ($) $ in Thousands	3 Months Ended					12 Months Ended
	Jul. 03, 2015	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Discontinued Operations And Disposal Groups [Abstract]
Revenue from discontinued operations							$ 10,514	$ 33,792
Loss from discontinued operations, before income tax						$ (13)	(8,059)	(3,361)
Loss from discontinued operations, net of tax	$ (13)	$ (790)	$ (273)	$ (2,678)	$ (1,866)	$ (13)	(5,607)	(2,054)
Loss on disposal of discontinued operations, net of tax		$ (1,405)	$ (321)				$ (1,726)	$ (592)

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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		$ (16,456)	$ (6,342)	$ (9,749)
Other comprehensive income (loss)		(3,249)	(10,488)	2,686
Amounts reclassified from other comprehensive income (loss)	[1]	875	374	721
Ending Balance		(18,830)	(16,456)	(6,342)
Cumulative translation adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(5,615)	1,353	1,299
Other comprehensive income (loss)		(4,083)	(6,968)	54
Ending Balance		(9,698)	(5,615)	1,353
Pension liability
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(10,841)	(7,695)	(11,048)
Other comprehensive income (loss)		834	(3,520)	2,632
Amounts reclassified from other comprehensive income (loss)	[1]	875	374	721
Ending Balance		$ (9,132)	$ (10,841)	$ (7,695)

[1] The amounts reclassified from other comprehensive income (loss) were included in selling, general and administrative expenses in the consolidated statements of operations.

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Summary of Changes in Goodwill (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Goodwill [Line Items]
Balance at beginning of year	$ 90,746
Balance at end of year	103,456
Applimotion Inc.
Goodwill [Line Items]
Goodwill acquired from acquisition	7,672
Lincoln Laser Company
Goodwill [Line Items]
Goodwill acquired from acquisition	3,367
Skyetek Inc.
Goodwill [Line Items]
Goodwill acquired from acquisition	$ 1,671

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Goodwill By Reportable Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill	$ 254,685	$ 241,975
Accumulated impairment of goodwill	(151,229)	(151,229)
Total	103,456	90,746
Laser Products
Goodwill [Line Items]
Goodwill	136,321	132,954
Accumulated impairment of goodwill	(102,461)	(102,461)
Total	33,860	30,493
Vision Technologies
Goodwill [Line Items]
Goodwill	84,401	82,730
Accumulated impairment of goodwill	(31,722)	(31,722)
Total	52,679	51,008
Precision Motion
Goodwill [Line Items]
Goodwill	33,963	26,291
Accumulated impairment of goodwill	(17,046)	(17,046)
Total	$ 16,917	$ 9,245

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Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	$ 165,858	$ 155,127
Amortizable intangible assets, accumulated amortization	(112,616)	(100,912)
Amortizable intangible assets, net carrying amount	$ 53,242	$ 54,215
Amortizable intangible assets, weighted average remaining life (Years)	11 years	11 years 9 months 18 days
Non-amortizable intangible assets	$ 13,027	$ 13,027
Gross carrying amount	178,885	168,154
Net carrying amount	66,269	67,242
Patents and Acquired Technologies
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	82,821	78,253
Amortizable intangible assets, accumulated amortization	(66,297)	(62,010)
Amortizable intangible assets, net carrying amount	$ 16,524	$ 16,243
Amortizable intangible assets, weighted average remaining life (Years)	7 years 8 months 12 days	7 years 6 months
Customer Relationships
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	$ 67,168	$ 63,029
Amortizable intangible assets, accumulated amortization	(36,914)	(31,531)
Amortizable intangible assets, net carrying amount	$ 30,254	$ 31,498
Amortizable intangible assets, weighted average remaining life (Years)	13 years 7 months 6 days	14 years 8 months 12 days
Customer Backlog
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	$ 2,644	$ 1,810
Amortizable intangible assets, accumulated amortization	(2,589)	(1,641)
Amortizable intangible assets, net carrying amount	$ 55	$ 169
Amortizable intangible assets, weighted average remaining life (Years)	1 year	2 months 12 days
Non-compete Covenant
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	$ 2,514	$ 1,830
Amortizable intangible assets, accumulated amortization	(882)	(366)
Amortizable intangible assets, net carrying amount	$ 1,632	$ 1,464
Amortizable intangible assets, weighted average remaining life (Years)	3 years 2 months 12 days	4 years 2 months 12 days
Trademarks and Trade Names
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	$ 10,711	$ 10,205
Amortizable intangible assets, accumulated amortization	(5,934)	(5,364)
Amortizable intangible assets, net carrying amount	$ 4,777	$ 4,841
Amortizable intangible assets, weighted average remaining life (Years)	9 years 1 month 6 days	9 years 9 months 18 days

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Amortization Expense of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense – cost of revenue									$ 4,712	$ 6,143	$ 5,280
Amortization expense – operating expenses	$ 2,018	$ 1,852	$ 1,852	$ 1,889	$ 2,799	$ 2,843	$ 2,876	$ 1,744	7,611	10,262	7,270
Total amortization expense									$ 12,323	$ 16,405	$ 12,550

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Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
2016	$ 11,461
2017	10,498
2018	8,386
2019	6,092
2020	3,919
Thereafter	12,886
Amortizable intangible assets, net carrying amount	53,242	$ 54,215
Cost of Revenue
Finite-Lived Intangible Assets [Line Items]
2016	3,963
2017	3,600
2018	2,080
2019	1,768
2020	1,501
Thereafter	3,612
Amortizable intangible assets, net carrying amount	16,524
Operating Expenses
Finite-Lived Intangible Assets [Line Items]
2016	7,498
2017	6,898
2018	6,306
2019	4,324
2020	2,418
Thereafter	9,274
Amortizable intangible assets, net carrying amount	$ 36,718

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Goodwill, Intangible Assets and Impairment Charges - Additional Information (Details)	3 Months Ended		12 Months Ended
	Apr. 03, 2015 USD ($)	Dec. 31, 2014 USD ($) Tradeshow	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Goodwill And Intangible Assets [Line Items]
Impairment of goodwill and intangible assets		$ 41,442,000	$ 41,442,000
Impairment Charge, Intangible assets			21,867,000
Impairment Charge, Goodwill			$ 19,575,000
Minimum
Goodwill And Intangible Assets [Line Items]
Reporting units in excess of carrying value	20.00%
Vision Technologies
Goodwill And Intangible Assets [Line Items]
Impairment of goodwill and intangible assets	$ 0			$ 0
Number of main tradeshows for the NDS Business | Tradeshow		2
Impairment Charge, Intangible assets		$ 21,800,000
Impairment Charge, Goodwill		$ 19,600,000

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Results of Impairment Review (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Pre-Impairment Net Carrying Value, Goodwill	$ 110,321	$ 110,321
Pre-Impairment Net Carrying Value, Intangible assets	89,109	89,109
Pre-Impairment Net Carrying Value, Total	199,430	199,430
Impairment Charge, Goodwill		(19,575)
Impairment Charge, Intangible assets		(21,867)
Impairment Charge, Total	(41,442)	(41,442)
Post-Impairment Net Carrying Value, Goodwill	90,746	90,746	$ 103,456
Post-Impairment Net Carrying Value, Intangible assets	67,242	67,242	$ 66,269
Post-Impairment Net Carrying Value, Total	$ 157,988	$ 157,988

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Fair Value of Intangible Assets - Additional Information (Details) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 18, 2015	Dec. 31, 2014
Business Acquisition Contingent Consideration [Line Items]
Future contingent consideration	$ 3,889,000	$ 3,889,000
Contingent consideration adjustment	400,000	430,000
Fair Value, Inputs, Level 3
Business Acquisition Contingent Consideration [Line Items]
Fair value of assets or liabilities				$ 0
Skyetek Inc.
Business Acquisition Contingent Consideration [Line Items]
Future contingent consideration	$ 200,000	$ 200,000	$ 200,000

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Fair Values of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash equivalents	$ 4,657	$ 2,255
Liabilities
Contingent consideration	3,889
Fair Value, Inputs, Level 1
Assets
Cash equivalents	4,657	$ 2,255
Fair Value, Inputs, Level 3
Liabilities
Contingent consideration	$ 3,889

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Fair Value Measurements - Summary of Changes in the Fair Value of Level 3 Contingent Consideration (Details) - Fair Value, Inputs, Level 3 $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value adjustment	$ 430
Balance at December 31, 2015	3,889
Applimotion Inc.
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Acquisition of company	965
Lincoln Laser Company
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Acquisition of company	2,344
Skyetek Inc.
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Acquisition of company	$ 150

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Fair Value Measurements - Summary of Changes in the Fair Value Measurement of the Company's Level 3 Financial Instrument (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Applimotion Inc.
Fair Value Inputs Liabilities Quantitative Information [Line Items]
Fair Value	$ 1,395
Unobservable Inputs	Historical and projected revenues for fiscal years 2015 to 2017
Revenue volatility	87.30%
Cost of debt	2.82%
WACC	11.10%
Lincoln Laser Company
Fair Value Inputs Liabilities Quantitative Information [Line Items]
Fair Value	$ 2,344
Unobservable Inputs	Projected revenues for fiscal year 2016
Revenue volatility	37.10%
Cost of debt	4.70%
WACC	9.80%

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Computation of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Numerators:
Income (loss) from continuing operations										$ 35,628	$ (16,909)	$ 9,977
Consolidated loss from discontinued operations										(13)	(7,333)	(2,646)
Less: income attributable to noncontrolling interest								$ (3)	$ (7)		(10)	(22)
Loss from discontinued operations attributable to GSI Group Inc.										(13)	(7,343)	(2,668)
Net income (loss) attributable to GSI Group Inc.						$ (30,485)	$ 4,525	$ 725	$ 983	$ 35,615	$ (24,252)	$ 7,309
Denominators:
Weighted average common shares outstanding—basic										34,579	34,352	34,073
Dilutive potential common shares	[1]									248		323
Weighted average common shares outstanding— diluted										34,827	34,352	34,396
Antidilutive common shares excluded from above											439	246
Basic Earnings (Loss) per Common Share:
From continuing operations		$ 0.18	$ 0.19	$ 0.56	$ 0.10	$ (0.82)	$ 0.15	$ 0.10	$ 0.08	$ 1.03	$ (0.49)	$ 0.29
From discontinued operations				0.00		(0.06)	(0.02)	(0.08)	(0.05)	0.00	(0.21)	(0.08)
Basic earnings (loss) per share attributable to GSI Group Inc.		0.18	0.19	0.56	0.10	(0.88)	0.13	0.02	0.03	1.03	(0.70)	0.21
Diluted Earnings (Loss) per Common Share:
From continuing operations		0.18	0.19	0.56	0.10	(0.82)	0.15	0.10	0.08	1.02	(0.49)	0.29
From discontinued operations				0.00		(0.06)	(0.02)	(0.08)	(0.05)	0.00	(0.21)	(0.08)
Diluted earnings (loss) per share attributable to GSI Group Inc.		$ 0.18	$ 0.19	$ 0.56	$ 0.10	$ (0.88)	$ 0.13	$ 0.02	$ 0.03	$ 1.02	$ (0.70)	$ 0.21

[1] Due to the Company’s net loss position for the year ended December 31, 2014, all potentially dilutive shares were excluded as their effect would have been anti-dilutive.

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Earnings (Loss) Per Common Share - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended		27 Months Ended
	Dec. 31, 2015	Dec. 31, 2013	Dec. 31, 2015	Oct. 31, 2013
Computation Of Earnings Per Share Line Items
Repurchase of common stock	$ 1,627,000	$ 526,000
Shares repurchased, average cost per share	$ 13.29
Capital Stock
Computation Of Earnings Per Share Line Items
Shares repurchased	122	50
Common Stock Repurchase Plan
Computation Of Earnings Per Share Line Items
Repurchase of common stock			$ 2,200,000
Shares repurchased, average cost per share			$ 12.48
Common Stock Repurchase Plan | Capital Stock
Computation Of Earnings Per Share Line Items
Shares repurchased			172
Maximum
Computation Of Earnings Per Share Line Items
Outstanding common stock repurchase program authorized amount				$ 10,000,000

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Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 38,511	$ 38,934
Work-in-process	10,138	9,899
Finished goods	9,266	11,945
Demo and consigned inventory	1,651	2,165
Total inventories	$ 59,566	$ 62,943

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Property Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 91,530	$ 96,709
Accumulated depreciation	(50,980)	(56,621)
Property, plant and equipment, net	40,550	40,088
Land, Buildings and Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	48,154	46,222
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 43,376	$ 50,487

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Supplementary Balance Sheet Information - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Asset capitalized under capital lease	$ 13.2	$ 12.7
Capitalized software development costs	$ 1.9	$ 0.2	$ 0.2

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Summary of Depreciation Expense on Property, Plant and Equipment, Including Demo Units and Assets under Capital Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Depreciation expense	$ 7,873	$ 8,016	$ 7,400

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Summary of Total Accumulated Depreciation on Assets under Capital Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Accumulated depreciation on assets under capital leases	$ 3,798	$ 2,741

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Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Liabilities Disclosure [Abstract]
Accrued compensation and benefits	$ 7,357	$ 7,741
Accrued warranty	3,335	3,044	$ 3,315
Accrued restructuring	1,652	109
Accrued professional services fees and other	8,838	8,507
Total	$ 21,182	$ 19,401

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Accrued Warranty (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Product Warranties Disclosures [Abstract]
Balance at beginning of year	$ 3,044	$ 3,315
Provision charged to cost of revenue	2,025	1,684
Acquisition related warranty accrual	132	90
Use of provision	(1,454)	(2,003)
Divestiture of JK Lasers	(389)
Foreign currency exchange rate changes	(23)	(42)
Balance at end of year	$ 3,335	$ 3,044

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Summary of Other Long Term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Noncurrent [Abstract]
Capital lease obligations	$ 9,173	$ 9,507
Accrued pension liabilities	3,693	6,037
Accrued contingent considerations	3,889
Other	2,690	3,275
Total	$ 19,445	$ 18,819

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Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Less: unamortized debt issuance costs		$ (200)
Total current portion of long-term debt	$ 7,385	7,345
Less: unamortized debt issuance costs		(2,500)
Total long-term debt	88,426	105,030
Total Senior Credit Facilities	95,811	112,375
Term Loans
Debt Instrument [Line Items]
Current portion of long-term debt, Gross	7,500	7,500
Less: unamortized debt issuance costs	(115)	(155)
Long-term debt, Gross	20,000	27,500
Total Senior Credit Facilities	27,500
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, Gross	70,000	80,000
Term Loan and Revolving Credit Facility
Debt Instrument [Line Items]
Less: unamortized debt issuance costs	$ (1,574)	$ (2,470)

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Debt - Additional Information (Details) - USD ($)			12 Months Ended
	Sep. 13, 2013	Dec. 27, 2012	Dec. 31, 2015	Dec. 31, 2014	Feb. 10, 2014
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 125,000,000
Revolving credit facility maturity year		2017-12
Credit facility accordion feature	$ 50,000,000
Third Amendment
Debt Instrument [Line Items]
Credit facility accordion feature	$ 100,000,000
Maximum consolidated leverage ratio	225.00%
Fourth Amendment
Debt Instrument [Line Items]
Maximum consolidated leverage ratio				250.00%
For Permitted Acquisitions And Stock Repurchases | Third Amendment
Debt Instrument [Line Items]
Maximum consolidated leverage ratio	275.00%
For Permitted Acquisitions And Stock Repurchases | Fourth Amendment
Debt Instrument [Line Items]
Maximum consolidated leverage ratio				300.00%
Senior Secured Credit Facility
Debt Instrument [Line Items]
Limitations on restricted payments, minimum available for borrowing			$ 25,000,000
Debt instrument interest rate			2.90%
Eurodollar Rate | Minimum
Debt Instrument [Line Items]
Variable interest rate			2.00%
Eurodollar Rate | Maximum
Debt Instrument [Line Items]
Variable interest rate			3.00%
Base Rate | Minimum
Debt Instrument [Line Items]
Variable interest rate			1.00%
Base Rate | Maximum
Debt Instrument [Line Items]
Variable interest rate			2.00%
Term Loans
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 50,000,000
Debt instrument maturity period		5 years
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 75,000,000
Debt instrument maturity period		5 years
Unused commitment fees percentage			0.40%
Available for borrowings capacity			$ 105,000,000
Revolving Credit Facility | Fourth Amendment
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 175,000,000
Credit facility accordion feature			$ 100,000,000
Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Unused commitment fees percentage			0.25%
Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Unused commitment fees percentage			0.625%

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Principal Repayments on Outstanding Term Loan (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Long Term Debt Maturities Repayments Of Principal [Line Items]
Total Senior Credit Facilities	$ 95,811	$ 112,375
Term Loans
Long Term Debt Maturities Repayments Of Principal [Line Items]
2016	7,500
2017	20,000
Total Senior Credit Facilities	$ 27,500

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Share-Based Compensation - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	May. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense recognized		$ 4,065	$ 4,651	$ 5,567
Unrecognized stock-based compensation expense		$ 4,900
Unrecognized stock-based compensation expense, weighted-average recognition period		1 year 10 months 24 days
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units issued	180,000
Vesting period	2 years	3 years
Deferred Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense recognized		$ 500	$ 500	$ 500
2010 Incentive Award Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum number of shares to be issued					4,398,613
Incentive plan and award expiration date		Apr. 09, 2024
Shares available for future issuance		1,986,154
2010 Incentive Award Plan | Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total fair value of restricted stock vested		$ 5,100

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Restricted Stock Units Issued and Outstanding (Details) - 2010 Incentive Award Plan - Restricted Stock Units (RSUs) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Restricted Stock Units
Unvested, Beginning Balance | shares	749
Granted | shares	345
Vested | shares	(428)
Forfeited | shares	(47)
Unvested, Ending Balance | shares	619
Expected to vest at end of period | shares	605
Weighted Average Grant Date Fair Value
Unvested, Beginning Balance | $ / shares	$ 10.80
Granted | $ / shares	13.46
Vested | $ / shares	10.73
Forfeited | $ / shares	11.11
Unvested, Ending Balance | $ / shares	12.32
Expected to vest at end of period | $ / shares	$ 12.31
Weighted Average Remaining Vesting Period (in years)
Unvested at end of period	10 months 17 days
Expected to vest at end of period	10 months 17 days
Aggregate Intrinsic Value
Unvested at end of period | $	$ 8,429	[1]
Expected to vest at end of period | $	$ 8,243	[1]

[1] The aggregate intrinsic value is calculated based on the fair value of $13.62 per share of the Company’s common stock on December 31, 2015 due to the fact that the restricted stock units carry a $0 purchase price.

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Restricted Stock Units Issued and Outstanding (Parenthetical) (Details) - 2010 Incentive Award Plan - Restricted Stock Units (RSUs)	Dec. 31, 2015 $ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock fair value per share	$ 13.62
Restricted stock units purchase price per share	$ 0

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Share Based Compensation Expense Recorded In Income from Continuing Operations in Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 4,065	$ 4,651	$ 5,567
Selling, general and administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	3,960	3,967	5,144
Research and development and engineering
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	170	196	180
Cost of Revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	257	166	118
Restructuring, acquisition and divestiture related costs
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense, adjustment	$ (322)	$ 322	$ 125

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Net Periodic Pension Cost (Details) - UNITED KINGDOM - Foreign Pension Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of the net periodic pension cost:
Interest cost	$ 1,340	$ 1,589	$ 1,403
Expected return on plan assets	(1,844)	(1,958)	(1,595)
Amortization of actuarial losses	875	374	668
Net periodic pension cost	$ 371	$ 5	$ 476

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Actuarial Assumptions used to Compute Net Periodic Pension Cost for U.K. Plan (Details) - UNITED KINGDOM	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average discount rate	3.50%	4.60%	4.30%
Weighted-average long-term rate of return on plan assets	5.60%	5.90%	5.70%

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Actuarial Assumptions used to Compute Funded Status for U.K. Plan (Details) - UNITED KINGDOM	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average discount rate	3.80%	3.50%
Rate of inflation	2.80%	2.70%

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Reconciliation of Benefit Obligations and Plan Assets of U.K. Plan (Details) - UNITED KINGDOM - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Change in benefit obligation:
Projected benefit obligation at beginning of year	$ 39,421	$ 35,193
Interest cost	1,340	1,589
Actuarial (gains) losses	(2,083)	6,060
Benefits paid	(798)	(1,006)
Foreign currency exchange rate changes	(1,966)	(2,415)
Projected benefit obligation at end of year	35,914	39,421
Accumulated benefit obligation at end of year	35,914	39,421
Change in plan assets:
Fair value of plan assets at beginning of year	33,610	33,457
Actual return on plan assets	342	2,234
Employer contributions	955	1,000
Benefits paid	(798)	(1,006)
Foreign currency exchange rate changes	(1,735)	(2,075)
Fair value of plan assets at end of year	32,374	33,610
Funded status at end of year	(3,540)	(5,811)
Amounts included in accumulated other comprehensive loss not yet recognized in net periodic pension cost:
Net actuarial loss	(9,874)	(11,890)
Amounts expected to be amortized from accumulated other comprehensive loss into net periodic pension cost over the next fiscal year consists of:
Net actuarial loss	$ 794	$ 892

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Expected Future Benefit Payments (Details) - UNITED KINGDOM $ in Thousands	Dec. 31, 2015 USD ($)
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
2016	$ 941
2017	1,043
2018	868
2019	1,244
2020	1,428
2021-2025	8,135
Total	$ 13,659

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Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Benefit Plan [Line Items]
Defined benefit plan contributions by employer	$ 2,700	$ 2,600	$ 1,700
Global Equities
Employee Benefit Plan [Line Items]
Defined benefit plan, target plan asset allocations	60.00%
Global Bonds
Employee Benefit Plan [Line Items]
Defined benefit plan, target plan asset allocations	18.00%
Alternative Assets
Employee Benefit Plan [Line Items]
Defined benefit plan, target plan asset allocations	9.00%
Cash
Employee Benefit Plan [Line Items]
Defined benefit plan, target plan asset allocations	13.00%
UNITED KINGDOM
Employee Benefit Plan [Line Items]
Funding valuation period	3 years
Defined benefit plan contributions by employer	$ 955	$ 1,000
Defined benefit plan estimated employer contributions for 2014	$ 1,000
Defined benefit plans increase future employer contributions percentage	2.90%

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Summary of Fair Value of Plan Assets by Asset Category (Details) - UNITED KINGDOM - USD ($) $ in Thousands	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	$ 32,374		$ 33,610		$ 33,457
Fair Value, Inputs, Level 1
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	180		174
Fair Value, Inputs, Level 2
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	32,194		33,436
Mutual Funds | Balanced Fund
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	15,611	[1]	16,287	[2]
Mutual Funds | Balanced Fund | Fair Value, Inputs, Level 2
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	15,611	[1]	16,287	[2]
Mutual Funds | Growth Funds
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	16,583	[3]	17,149	[4]
Mutual Funds | Growth Funds | Fair Value, Inputs, Level 2
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	16,583	[3]	17,149	[4]
Cash
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	180		174
Cash | Fair Value, Inputs, Level 1
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	$ 180		$ 174

[1] This class comprises a diversified portfolio of global investments which seeks a balanced return between capital growth and fixed income and is allocated on a weighted average basis as follows: equities (52%), bonds (24%), other assets (9%) and cash (15%).

[2] This class comprises a diversified portfolio of global investments which seeks a balanced return between capital growth and fixed income and is allocated on a weighted average basis as follows: equities (54%), bonds (32%), other assets (5%) and cash (9%).

[3] This class comprises a diversified portfolio of global investments which seeks long-term capital growth and is allocated on a weighted average basis as follows: equities (67%), bonds (12%), other assets (9%) and cash (12%).

[4] This class comprises a diversified portfolio of global investments which seeks long-term capital growth and is allocated on a weighted average basis as follows: equities (67%), other assets (15%), bonds (8%), and cash (10%).

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Summary of Fair Value of Plan Assets by Asset Category (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Cash
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, target plan asset allocations	13.00%
UNITED KINGDOM | Bonds | Balanced Fund
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, target plan asset allocations	24.00%	32.00%
UNITED KINGDOM | Bonds | Growth Funds
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, target plan asset allocations	12.00%	8.00%
UNITED KINGDOM | Equity Securities | Balanced Fund
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, target plan asset allocations	52.00%	54.00%
UNITED KINGDOM | Equity Securities | Growth Funds
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, target plan asset allocations	67.00%	67.00%
UNITED KINGDOM | Other Asset | Balanced Fund
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, target plan asset allocations	9.00%	5.00%
UNITED KINGDOM | Other Asset | Growth Funds
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, target plan asset allocations	9.00%	15.00%
UNITED KINGDOM | Cash | Balanced Fund
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, target plan asset allocations	15.00%	9.00%
UNITED KINGDOM | Cash | Growth Funds
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, target plan asset allocations	12.00%	10.00%

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Components of Income (Loss) from Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income (loss) from continuing operations before income taxes:
Income (loss) from continuing operations before income taxes	$ 5,935	$ 9,020	$ 25,821	$ 5,246	$ (34,303)	$ 7,132	$ 5,463	$ 3,793	$ 46,022	$ (17,915)	$ 16,177
CANADA
Income (loss) from continuing operations before income taxes:
Foreign									(1,674)	(20,212)	(5,366)
UNITED STATES
Income (loss) from continuing operations before income taxes:
U.S.									23,298	(9,661)	12,838
Other Countries
Income (loss) from continuing operations before income taxes:
Foreign									$ 24,398	$ 11,958	$ 8,705

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Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components Of Income Tax Expense Benefit [Line Items]
Current income tax provision (benefit)									$ 12,086	$ 5,730	$ 2,314
Deferred income tax provision (benefit)									(1,692)	(6,736)	3,886
Income Tax Provision (benefit)	$ (168)	$ 2,452	$ 6,310	$ 1,800	$ (6,013)	$ 2,013	$ 2,057	$ 937	10,394	(1,006)	6,200
CANADA
Components Of Income Tax Expense Benefit [Line Items]
Current income tax provision (benefit)									96	175	0
Deferred income tax provision (benefit)									0	0	0
UNITED STATES
Components Of Income Tax Expense Benefit [Line Items]
Current income tax provision (benefit)									8,136	3,615	1,662
Deferred income tax provision (benefit)									(3,239)	(6,731)	2,206
Other Countries
Components Of Income Tax Expense Benefit [Line Items]
Current income tax provision (benefit)									3,854	1,940	652
Deferred income tax provision (benefit)									$ 1,547	$ (5)	$ 1,680

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Reconciliation of Statutory Canadian Tax rate to Effective Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Effective Tax Rate Reconciliation [Line Items]
Income Tax Provision (benefit)	$ (168)	$ 2,452	$ 6,310	$ 1,800	$ (6,013)	$ 2,013	$ 2,057	$ 937	$ 10,394	$ (1,006)	$ 6,200
Canada Revenue Agency
Schedule Of Effective Tax Rate Reconciliation [Line Items]
Statutory Canadian tax rate									27.00%	27.00%	26.00%
Expected income tax provision at Canadian statutory tax rate									$ 12,426	$ (4,837)	$ 4,206
International tax rate differences									304	(1,132)	156
State income taxes, net									453	(271)	148
Withholding and other taxes									680	421	321
Permanent differences									1,130	486	106
Section 199 deduction									(1,188)	(574)
Change in valuation allowance									(612)	4,809	(3,076)
Provision to return differences									(617)	962	(312)
Tax credits									(990)	(1,678)	(938)
Net operating loss expirations											4,538
Statutory tax rate change									95	(13)	354
Uncertain tax positions									121	134	259
IRS audit									(748)	241	680
JK Lasers divestiture									(1,432)
Goodwill impairment										330
Other									772	116	(242)
Income Tax Provision (benefit)									$ 10,394	$ (1,006)	$ 6,200
Effective tax rate									22.60%	5.60%	38.30%

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Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Losses & IRC Section 163(j) carryforwards	$ 9,985	$ 12,742
Compensation related deductions	2,915	3,749
Tax credits	2,409	3,502
Restructuring related liabilities	294	64
Inventory	4,415	4,495
Depreciation	503	683
Amortization	3,205
Warranty	1,127	876
Other	1,281	2,206
Total deferred tax assets	26,134	28,317
Valuation allowance for deferred tax assets	(12,537)	(14,495)
Net deferred tax assets	13,597	13,822
Deferred tax liabilities:
Equity investment	(1,733)	(1,594)
Depreciation		(341)
Amortization	(2,791)	(36)
Unrealized currency gain/loss	(1,292)	(2,595)
Other	(345)	(525)
Total deferred tax liabilities	(6,161)	(5,091)
Net deferred income tax assets (liabilities)	$ 7,436	$ 8,731

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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Capital loss carryforward	$ 600	$ 400
Loss carryforwards	4,900	4,500
Tax credits	2,400	4,200
Undistributed earnings of foreign subsidiaries	18,200
Estimated unrecognized deferred income tax liabilities related to undistributed earnings of foreign subsidiaries	400
Unrecognized tax benefits	5,490	6,274	$ 7,074	$ 7,554
Unrecognized tax benefits that will impact tax rate if recognized	4,100	4,100	4,900
Unrecognized tax benefit income tax interest and penalties accrued	900	900
Unrecognized tax benefits, income tax penalties and interest expense	100	300
Maximum
Income Taxes [Line Items]
Maximum unrecognized tax benefits expected to be recorded in next twelve months	1,200
CANADA
Income Taxes [Line Items]
Adjusted loss carryforward and related valuation allowance			4,800
Loss carryforwards	$ 2,400	$ 2,300
Operating loss carryforwards expiration year	2031	2015
Tax credits	$ 1,700	$ 2,100
CANADA | Tax Credit That Will Expire In Certain Period
Income Taxes [Line Items]
Tax credits	$ 1,100	$ 800
Tax credits, expiration Year	2022	2021
CANADA | Tax Credits That Can Be Carried Forward Indefinitely
Income Taxes [Line Items]
Tax credits	$ 600	$ 1,300
UNITED STATES
Income Taxes [Line Items]
Loss carryforwards	$ 1,600	$ 1,400
Operating loss carryforwards expiration year	2034	2033
Tax credits	$ 700
UNITED STATES | Tax Credit That Will Expire In Certain Period
Income Taxes [Line Items]
Tax credits	$ 600	$ 2,100
Tax credits, expiration Year	2030	2034
UNITED STATES | Tax Credits That Can Be Carried Forward Indefinitely
Income Taxes [Line Items]
Tax credits	$ 100
UNITED KINGDOM
Income Taxes [Line Items]
Loss carryforwards	700	$ 800
Other Countries
Income Taxes [Line Items]
Loss carryforwards	$ 200
Operating loss carryforwards expiration year	2020
State and Local Jurisdiction
Income Taxes [Line Items]
Valuation allowances against current year net operating losses in certain tax jurisdictions	$ 800	300	1,300
Capital loss carryforward	$ 800	$ 300	300
Foreign Tax Authority
Income Taxes [Line Items]
Adjusted loss carryforward and related valuation allowance			$ 700

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Reconciliation of Total Amounts of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Beginning balance of unrecognized tax benefits	$ 6,274	$ 7,074	$ 7,554
Additions based on tax positions related to the current year	752	1,180	508
Additions for tax positions of prior years	78	2,601	1,475
Reductions for tax positions of prior years	(626)	(2,404)	(1,888)
Reductions to tax positions resulting from a lapse of the applicable statute of limitations	(226)	(2,177)	(575)
Settlements with taxation authorities	(762)
Ending balance of unrecognized tax benefits	$ 5,490	$ 6,274	$ 7,074

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Income Tax Returns to be Reviewed (Details)	12 Months Ended
	Dec. 31, 2015
UNITED STATES
Income Tax Examination [Line Items]
Income tax returns to be reviewed	2009
CANADA
Income Tax Examination [Line Items]
Income tax returns to be reviewed	2010
UNITED KINGDOM
Income Tax Examination [Line Items]
Income tax returns to be reviewed	2014
GERMANY
Income Tax Examination [Line Items]
Income tax returns to be reviewed	2008
NETHERLANDS
Income Tax Examination [Line Items]
Income tax returns to be reviewed	2010
CHINA
Income Tax Examination [Line Items]
Income tax returns to be reviewed	2012
JAPAN
Income Tax Examination [Line Items]
Income tax returns to be reviewed	2011

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Schedule of Restructuring, Acquisition and Divestiture Related Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 5,840	$ 414	$ 3,757
Acquisition and related charges	1,301	1,521	1,630
Divestiture related charges	1,113
Total acquisition and divestiture related charges	2,414	1,521	1,630
Total restructuring, acquisition and divestiture related costs	8,254	1,935	5,387
GERMANY
Restructuring Cost And Reserve [Line Items]
Restructuring charges			7
2016 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring charges	3,148
2015 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring charges	1,484
2013 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring charges		25	2,463
2011 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 1,208	$ 389	$ 1,287

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Restructuring, Acquisition and Divestiture Related Costs - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) Facility	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		$ 5,840	$ 414	$ 3,757
Cash payments		(3,126)	(933)
Acquisition and related charges		1,301	1,521	1,630
Divestiture related charges		1,113
JK Lasers Divestiture
Restructuring Cost And Reserve [Line Items]
Divestiture related charges		1,100
Finders' Fees, Legal, Valuation And Other Professional Or Consulting Fees
Restructuring Cost And Reserve [Line Items]
Acquisition and related charges		1,500	900	1,600
Earn-out Agreement
Restructuring Cost And Reserve [Line Items]
Acquisition and related charges		(200)	600	0
Scenario, Forecast
Restructuring Cost And Reserve [Line Items]
Cash payments	$ 1,800
Severance
Restructuring Cost And Reserve [Line Items]
Cash payments		(2,668)	(502)
Facility
Restructuring Cost And Reserve [Line Items]
Cash payments		(156)	(293)
Other Restructuring Charges
Restructuring Cost And Reserve [Line Items]
Cash payments		$ (302)	(138)
2016 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring plan		During the third quarter of 2015, the Company initiated a program targeting annualized savings of $4.5 million to $5.5 million after the program is fully executed. The 2016 restructuring program includes consolidating our manufacturing operations to optimize our facility footprint and better utilize resources, and reducing redundant costs due to productivity cost savings and business volume reductions. We anticipate completing the 2016 restructuring program during the second quarter of 2016.
Restructuring Costs		$ 3,148
2016 Restructuring | Severance
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		2,600
2016 Restructuring | Facility
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		300
2016 Restructuring | Other Restructuring Charges
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		$ 200
2015 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring plan		During the first quarter of 2015, the Company implemented a program to eliminate redundant costs, as a result of acquisition and divestiture activities, to better align our operations to our strategic growth plans, to further integrate our business lines, and as a consequence of our productivity initiatives.
Restructuring Costs		$ 1,484
2015 Restructuring | Severance
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		1,400
2015 Restructuring | Other Restructuring Charges
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		$ 100
2013 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring plan		During the first half of 2013, the Company initiated a program following our acquisition of NDS to integrate the NDS business into our operating structure and further reduce manufacturing and operating costs across businesses to leverage our infrastructure and further integrate our product lines.
Restructuring Costs			25	2,463
2011 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring plan		In November 2011, the Company announced a strategic initiative (“2011 restructuring”) which aimed to consolidate operations to reduce the Company’s cost structure and improve operational efficiency. In total, eleven facilities have been exited as part of the 2011 restructuring plan. These eliminations resulted in the consolidation of the manufacturing facilities of the Scientific Lasers business and the optics products, the consolidation of the Company’s German operations into one facility, the consolidation of the laser scanners business into the Company’s Bedford, Massachusetts facility and the consolidation of the Company’s Japan operation into one facility. Included in the eleven facilities exited are five facilities exited as part of the Semiconductor and Laser Systems business divestitures. The restructuring costs for the Semiconductor and Laser Systems businesses have been excluded from the table below as they have been reported as part of the operating results from discontinued operations. The Company substantially completed the 2011 restructuring program in 2013. Restructuring costs from the 2011 restructuring program recognized in 2014 and 2015 are primarily depreciation and other costs for the idle facility that was vacated by the Laser Systems business.
Restructuring Costs		$ 1,208	$ 389	$ 1,287
Number of facilities exited | Facility		11

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Summary of Restructuring Costs for Each Segment and Unallocated Corporate Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 5,840	$ 414	$ 3,757
2016 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring charges	3,148
2016 Restructuring | Minimum
Restructuring Cost And Reserve [Line Items]
Expected Cumulative Costs	4,500
2016 Restructuring | Maximum
Restructuring Cost And Reserve [Line Items]
Expected Cumulative Costs	5,500
2016 Restructuring | Laser Products
Restructuring Cost And Reserve [Line Items]
Restructuring charges	55
2016 Restructuring | Laser Products | Minimum
Restructuring Cost And Reserve [Line Items]
Expected Cumulative Costs	300
2016 Restructuring | Laser Products | Maximum
Restructuring Cost And Reserve [Line Items]
Expected Cumulative Costs	400
2016 Restructuring | Vision Technologies
Restructuring Cost And Reserve [Line Items]
Restructuring charges	2,200
2016 Restructuring | Vision Technologies | Minimum
Restructuring Cost And Reserve [Line Items]
Expected Cumulative Costs	3,200
2016 Restructuring | Vision Technologies | Maximum
Restructuring Cost And Reserve [Line Items]
Expected Cumulative Costs	3,700
2016 Restructuring | Precision Motion
Restructuring Cost And Reserve [Line Items]
Restructuring charges	833
2016 Restructuring | Precision Motion | Minimum
Restructuring Cost And Reserve [Line Items]
Expected Cumulative Costs	700
2016 Restructuring | Precision Motion | Maximum
Restructuring Cost And Reserve [Line Items]
Expected Cumulative Costs	1,000
2016 Restructuring | Unallocated Corporate and Shared Services
Restructuring Cost And Reserve [Line Items]
Restructuring charges	60
2016 Restructuring | Unallocated Corporate and Shared Services | Minimum
Restructuring Cost And Reserve [Line Items]
Expected Cumulative Costs	300
2016 Restructuring | Unallocated Corporate and Shared Services | Maximum
Restructuring Cost And Reserve [Line Items]
Expected Cumulative Costs	400
2015 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring charges	1,484
2015 Restructuring | Laser Products
Restructuring Cost And Reserve [Line Items]
Restructuring charges	542
2015 Restructuring | Vision Technologies
Restructuring Cost And Reserve [Line Items]
Restructuring charges	525
2015 Restructuring | Precision Motion
Restructuring Cost And Reserve [Line Items]
Restructuring charges	79
2015 Restructuring | Unallocated Corporate and Shared Services
Restructuring Cost And Reserve [Line Items]
Restructuring charges	338
2013 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring charges		25	2,463
2013 Restructuring | Laser Products
Restructuring Cost And Reserve [Line Items]
Restructuring charges			836
2013 Restructuring | Vision Technologies
Restructuring Cost And Reserve [Line Items]
Restructuring charges			806
2013 Restructuring | Precision Motion
Restructuring Cost And Reserve [Line Items]
Restructuring charges			378
2013 Restructuring | Unallocated Corporate and Shared Services
Restructuring Cost And Reserve [Line Items]
Restructuring charges			443
2011 Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring charges	1,208	389	1,287
Cumulative Costs	5,262
2011 Restructuring | Laser Products
Restructuring Cost And Reserve [Line Items]
Restructuring charges	0		1,042
Restructuring charges reversal		(106)
Cumulative Costs	1,939
2011 Restructuring | Vision Technologies
Restructuring Cost And Reserve [Line Items]
Restructuring charges	0	0	48
Cumulative Costs	48
2011 Restructuring | Precision Motion
Restructuring Cost And Reserve [Line Items]
Restructuring charges	0	0	5
Cumulative Costs	122
2011 Restructuring | Unallocated Corporate and Shared Services
Restructuring Cost And Reserve [Line Items]
Restructuring charges	1,208	$ 495	$ 192
Cumulative Costs	$ 3,153

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Actual Cash and Non-Cash Charges of the Restructuring Plan (Details) - 2011 Restructuring - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost And Reserve [Line Items]
Total restructuring costs	$ 1,208	$ 389	$ 1,287
Cumulative Costs	5,262
Cash Charges
Restructuring Cost And Reserve [Line Items]
Total restructuring costs, reversal of incurred costs		(235)
Total restructuring costs	126		1,037
Cumulative Costs	3,174
Non-Cash Charges
Restructuring Cost And Reserve [Line Items]
Total restructuring costs	1,082	$ 624	$ 250
Cumulative Costs	$ 2,088

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Summary of Accrual Activities by Components Related to Company's Restructuring Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost And Reserve [Line Items]
Accrued expense beginning balance	$ 231	$ 1,374
Restructuring charges (reversal of charges)	5,840	414
Cash payments	(3,126)	(933)
Non-cash write-offs and other adjustments	(1,063)	(624)
Accrued expense ending balance	1,882	231
Severance
Restructuring Cost And Reserve [Line Items]
Accrued expense beginning balance	102	687
Restructuring charges (reversal of charges)	3,918	(83)
Cash payments	(2,668)	(502)
Non-cash write-offs and other adjustments	6
Accrued expense ending balance	1,358	102
Facility
Restructuring Cost And Reserve [Line Items]
Accrued expense beginning balance	108	648
Restructuring charges (reversal of charges)	441	(247)
Cash payments	(156)	(293)
Non-cash write-offs and other adjustments	13
Accrued expense ending balance	406	108
Depreciation
Restructuring Cost And Reserve [Line Items]
Restructuring charges (reversal of charges)	1,082	624
Non-cash write-offs and other adjustments	(1,082)	(624)
Other Restructuring Charges
Restructuring Cost And Reserve [Line Items]
Accrued expense beginning balance	21	39
Restructuring charges (reversal of charges)	399	120
Cash payments	(302)	(138)
Accrued expense ending balance	$ 118	$ 21

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Commitments and Contingencies - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) Customer	Dec. 31, 2014 USD ($) Customer	Dec. 31, 2013 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Lease expense	$ 4.5	$ 4.1	$ 4.9
Asset capitalized under capital lease	13.2	$ 12.7
Unconditional purchase commitments	35.9
Unconditional purchase commitments, 2016	34.1
Unconditional purchase commitments, 2017	1.5
Unconditional purchase commitments, 2018	$ 0.3
Number of customer accounted on accounts receivable balance | Customer	1
Number of customers accounted for 10% or more of accounts receivable | Customer	0	0
Minimum
Commitments And Contingencies Disclosure [Line Items]
Lease agreement expiration year	2017
Maximum
Commitments And Contingencies Disclosure [Line Items]
Lease agreement expiration year	2019
Land | Maximum
Commitments And Contingencies Disclosure [Line Items]
Lease agreement expiration year	2078

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Future Minimum Lease Payments under Operating and Capital Leases (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Operating Leases
2016	$ 4,973
2017	3,536
2018	2,723
2019	1,735
2020	154
Thereafter	5,361
Total minimum lease payments	18,482
Capital Leases
2016	1,498	[1]
2017	1,398	[1]
2018	968	[1]
2019	935	[1]
2020	907	[1]
Thereafter	8,139	[1]
Total minimum lease payments	$ 13,845	[1]

[1] Capital lease payments include interest payments of $3.8 million.

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Future Minimum Lease Payments under Operating and Capital Leases (Parenthetical) (Details) $ in Millions	Dec. 31, 2015 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Capital lease payments interest included in payment	$ 3.8

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Segment Information - Additional Information (Details)	12 Months Ended
	Dec. 31, 2015 Segment
Segment Reporting [Abstract]
Number of reportable segments	3

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Revenue, Gross Profit by Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 90,219	$ 92,271	$ 96,494	$ 94,614	$ 94,012	$ 94,656	$ 96,905	$ 79,133	$ 373,598	$ 364,706	$ 316,910
Gross Profit	$ 36,629	$ 39,910	$ 41,345	$ 40,006	$ 39,728	$ 39,683	$ 38,651	$ 32,105	157,890	150,167	132,227
Laser Products
Segment Reporting Information [Line Items]
Revenue									168,331	177,726	166,598
Gross Profit									73,602	74,224	68,819
Vision Technologies
Segment Reporting Information [Line Items]
Revenue									124,725	122,187	90,276
Gross Profit									48,966	48,678	35,824
Precision Motion
Segment Reporting Information [Line Items]
Revenue									80,542	64,793	60,036
Gross Profit									36,709	28,333	27,778
Unallocated Corporate and Shared Services
Segment Reporting Information [Line Items]
Gross Profit									$ (1,387)	$ (1,068)	$ (194)

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Operating Income (Loss) from Continuing Operations by Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Income (Loss) from Continuing Operations
Operating Income (Loss) from Continuing Operations	$ 4,214	$ 9,007	$ 10,315	$ 5,397	$ (34,176)	$ 6,822	$ 6,480	$ 4,068	$ 28,933	$ (16,806)	$ 19,446
Laser Products
Operating Income (Loss) from Continuing Operations
Operating Income (Loss) from Continuing Operations									35,971	33,053	25,143
Vision Technologies
Operating Income (Loss) from Continuing Operations
Operating Income (Loss) from Continuing Operations									(2,057)	(43,079)	3,566
Precision Motion
Operating Income (Loss) from Continuing Operations
Operating Income (Loss) from Continuing Operations									16,877	13,023	12,062
Unallocated Corporate and Shared Services
Operating Income (Loss) from Continuing Operations
Operating Income (Loss) from Continuing Operations									$ (21,858)	$ (19,803)	$ (21,325)

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Depreciation and Amortization by Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Depreciation and Amortization
Depreciation and amortization	$ 20,196	$ 24,421	$ 19,950
Laser Products
Depreciation and Amortization
Depreciation and amortization	6,083	6,481	6,335
Vision Technologies
Depreciation and Amortization
Depreciation and amortization	8,599	13,254	8,808
Precision Motion
Depreciation and Amortization
Depreciation and amortization	2,533	1,943	1,979
Unallocated Corporate and Shared Services
Depreciation and Amortization
Depreciation and amortization	$ 2,981	$ 2,743	$ 2,828

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Accounts Receivable and Inventory by Reportable Segments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts Receivable
Total accounts receivable	$ 57,188	$ 51,494
Inventory
Total inventory	59,566	62,943
Total segment assets	116,754	114,437
Laser Products
Accounts Receivable
Total accounts receivable	21,763	24,083
Inventory
Total inventory	29,501	34,947
Vision Technologies
Accounts Receivable
Total accounts receivable	21,691	18,922
Inventory
Total inventory	19,583	19,596
Precision Motion
Accounts Receivable
Total accounts receivable	13,734	8,489
Inventory
Total inventory	$ 10,482	$ 8,400

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Total Assets by Reportable Segments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Total segment assets	$ 116,754	$ 114,437
Cash and cash equivalents	59,959	51,146	$ 60,980	$ 65,788
Income taxes receivable	2,510	5,906
Deferred tax assets		5,971
Prepaid expenses and other current assets	5,989	5,081
Assets of discontinued operations	0	631
Property, plant and equipment, net	40,550	40,088
Deferred tax assets	7,885	2,912
Other assets	12,673	12,134
Intangible assets, net	66,269	67,242
Goodwill	103,456	90,746
Total assets	$ 416,045	$ 396,294

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Schedule of Geographic Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 373,598	$ 364,706	$ 316,910
Percentage of Total	100.00%	100.00%	100.00%
UNITED STATES
Segment Reporting Information [Line Items]
Revenue	$ 154,825	$ 140,973	$ 107,892
Percentage of Total	41.40%	38.70%	34.00%
GERMANY
Segment Reporting Information [Line Items]
Revenue	$ 54,743	$ 59,029	$ 56,287
Percentage of Total	14.70%	16.20%	17.80%
Rest Of Europe
Segment Reporting Information [Line Items]
Revenue	$ 48,277	$ 54,308	$ 45,698
Percentage of Total	12.90%	14.90%	14.40%
CHINA
Segment Reporting Information [Line Items]
Revenue	$ 38,491	$ 40,792	$ 37,651
Percentage of Total	10.30%	11.20%	11.90%
Rest of Asia-Pacific
Segment Reporting Information [Line Items]
Revenue	$ 62,467	$ 58,830	$ 57,802
Percentage of Total	16.70%	16.10%	18.20%
Other Countries
Segment Reporting Information [Line Items]
Revenue	$ 14,795	$ 10,774	$ 11,580
Percentage of Total	4.00%	2.90%	3.70%

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Summary of Long-lived Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	$ 40,550	$ 40,088
UNITED STATES
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	34,907	32,988
Europe
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	4,014	5,318
CHINA
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	1,593	1,705
Asia Pacific And Other Non Us Countries
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	$ 36	$ 77

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Supplementary Information - Additional Information (Details) - USD ($) $ in Thousands		1 Months Ended		3 Months Ended		12 Months Ended
	Apr. 15, 2015	Apr. 30, 2015	Jul. 31, 2014	Dec. 31, 2014	Sep. 26, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information [Line Items]
Proceeds from the sale of business, net of transaction costs						$ 29,570
Loss on disposal of discontinued operations, net of tax				$ (1,405)	$ (321)		$ (1,726)	$ (592)
Impairment of goodwill and intangible assets				$ 41,442			41,442
JK Lasers Business
Quarterly Financial Information [Line Items]
Proceeds from the sale of business, net of transaction costs	$ 29,600	$ 29,600
Loss on disposal of discontinued operations, net of tax	$ 19,600
NDS Acquisition
Quarterly Financial Information [Line Items]
Impairment of goodwill and intangible assets							41,400
Scientific Lasers Business
Quarterly Financial Information [Line Items]
Proceeds from the sale of business, net of transaction costs			$ 6,500
Loss on disposal of discontinued operations, net of tax							$ (1,700)

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Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 90,219	$ 92,271	$ 96,494	$ 94,614	$ 94,012	$ 94,656	$ 96,905	$ 79,133	$ 373,598	$ 364,706	$ 316,910
Cost of revenue	53,590	52,361	55,149	54,608	54,284	54,973	58,254	47,028	215,708	214,539	184,683
Gross profit	36,629	39,910	41,345	40,006	39,728	39,683	38,651	32,105	157,890	150,167	132,227
Operating expenses:
Research and development and engineering	7,295	7,693	7,840	8,215	7,837	7,735	7,525	5,857	31,043	28,954	23,787
Selling, general and administrative	19,080	19,979	20,922	22,068	21,840	21,512	21,410	19,618	82,049	84,380	76,337
Amortization expense – operating expenses	2,018	1,852	1,852	1,889	2,799	2,843	2,876	1,744	7,611	10,262	7,270
Restructuring, acquisition and divestiture related costs	4,022	1,379	416	2,437	(14)	771	360	818
Total operating expenses	32,415	30,903	31,030	34,609	73,904	32,861	32,171	28,037	128,957	166,973	112,781
Impairment of goodwill and intangible assets					41,442					41,442
Operating income (loss) from continuing operations	4,214	9,007	10,315	5,397	(34,176)	6,822	6,480	4,068	28,933	(16,806)	19,446
Interest income (expense), foreign exchange transaction gains (losses), other income (expense), net and gain on disposal of business	1,721	13	15,506	(151)	(127)	310	(1,017)	(275)
Income (loss) from continuing operations before income taxes	5,935	9,020	25,821	5,246	(34,303)	7,132	5,463	3,793	46,022	(17,915)	16,177
Income tax provision (benefit)	(168)	2,452	6,310	1,800	(6,013)	2,013	2,057	937	10,394	(1,006)	6,200
Income (loss) from continuing operations	6,103	6,568	19,511	3,446	(28,290)	5,119	3,406	2,856	35,628	(16,909)	9,977
Loss from discontinued operations, net of tax			(13)		(790)	(273)	(2,678)	(1,866)	(13)	(5,607)	(2,054)
Loss on disposal of discontinued operations, net of tax					(1,405)	(321)				(1,726)	(592)
Consolidated net income (loss)	$ 6,103	$ 6,568	$ 19,498	$ 3,446	(30,485)	4,525	728	990	35,615	(24,242)	7,331
Less: income attributable to noncontrolling interest							(3)	(7)		(10)	(22)
Net income (loss) attributable to GSI Group Inc.					$ (30,485)	$ 4,525	$ 725	$ 983	$ 35,615	$ (24,252)	$ 7,309
Earnings (loss) per common share from continuing operations:
Basic	$ 0.18	$ 0.19	$ 0.56	$ 0.10	$ (0.82)	$ 0.15	$ 0.10	$ 0.08	$ 1.03	$ (0.49)	$ 0.29
Diluted	0.18	0.19	0.56	0.10	(0.82)	0.15	0.10	0.08	1.02	(0.49)	0.29
Loss per common share from discontinued operations:
Basic			0.00		(0.06)	(0.02)	(0.08)	(0.05)	0.00	(0.21)	(0.08)
Diluted			0.00		(0.06)	(0.02)	(0.08)	(0.05)	0.00	(0.21)	(0.08)
Earnings (loss) per common share attributable to GSI Group Inc.:
Basic	0.18	0.19	0.56	0.10	(0.88)	0.13	0.02	0.03	1.03	(0.70)	0.21
Diluted	$ 0.18	$ 0.19	$ 0.56	$ 0.10	$ (0.88)	$ 0.13	$ 0.02	$ 0.03	$ 1.02	$ (0.70)	$ 0.21