10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☑	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended September 30, 2018

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 Number: 001-35435

 Proto Labs, Inc.

(Exact name of registrant as specified in its charter)

Minnesota	41-1939628
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
5540 Pioneer Creek Drive
Maple Plain, Minnesota	55359
(Address of principal executive offices)	(Zip Code)

(763) 479-3680

(Registrant’s telephone number, including area code)

                   Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

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 ☐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 during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  ☑Yes ☐No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☑	Accelerated filer	☐
Non-accelerated filer	☐
Smaller reporting company	☐	Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date: 27,070,318 shares of Common Stock, par value $0.001 per share, were outstanding at October 24, 2018. 

Proto Labs, Inc.

TABLE OF CONTENTS

Item	Description	Page
PART I
1.	Financial Statements	1
2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	15
3.	Quantitative and Qualitative Disclosures about Market Risk	25
4.	Controls and Procedures	26
PART II
1.	Legal Proceedings	27
1A.	Risk Factors	27
2.	Unregistered Sales of Equity Securities and Use of Proceeds	27
3.	Defaults Upon Senior Securities	27
4.	Mine Safety Disclosures	27
5.	Other Information	27
6.	Exhibits	28

i

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements 

Proto Labs, Inc.

Consolidated Balance Sheets

(In thousands, except share and per share amounts)

	September 30,			December 31,
	2018			2017
	(Unaudited)
Assets
Current assets
Cash and cash equivalents	$	62,593		$	36,707
Short-term marketable securities		57,561			57,424
Accounts receivable, net of allowance for doubtful accounts of $949 and $757 as of September 30, 2018 and December 31, 2017, respectively		62,131			51,503
Inventory		9,608			11,271
Prepaid expenses and other current assets		8,639			6,267
Income taxes receivable		-			1,832
Total current assets		200,532			165,004
Property and equipment, net		210,053			166,440
Goodwill		128,752			128,504
Other intangible assets, net		19,713			19,084
Long-term marketable securities		33,224			37,034
Other long-term assets		3,590			2,672
Total assets	$	595,864		$	518,738
Liabilities and shareholders' equity
Current liabilities
Accounts payable	$	17,300		$	15,876
Accrued compensation		14,462			12,100
Accrued liabilities and other		14,843			8,408
Short-term debt obligations		-			5,000
Income taxes payable		2,763			2,371
Total current liabilities		49,368			43,755
Long-term income taxes payable		2,181			2,181
Long-term deferred tax liabilities		8,732			6,966
Other long-term liabilities		4,377			4,621
Total liabilities		64,658			57,523
Shareholders' equity
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of each of September 30, 2018 and December 31, 2017		-			-
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 27,068,068 and 26,828,651 shares as of September 30, 2018 and December 31, 2017, respectively		27			27
Additional paid-in capital		254,957			241,725
Retained earnings		283,460			224,697
Accumulated other comprehensive loss		(7,238	)		(5,234	)
Total shareholders' equity		531,206			461,215
Total liabilities and shareholders' equity	$	595,864		$	518,738

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

1

Proto Labs, Inc.

Consolidated Statements of Comprehensive Income

(In thousands, except share and per share amounts)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Statements of Operations:
Revenue	$	115,430	$	88,105	$	332,827	$	250,312
Cost of revenue		53,027		38,793		153,303		109,358
Gross profit		62,403		49,312		179,524		140,954
Operating expenses
Marketing and sales		16,818		13,846		50,947		41,463
Research and development		7,458		5,877		21,155		17,784
General and administrative		13,096		10,222		38,679		28,256
Total operating expenses		37,372		29,945		110,781		87,503
Income from operations		25,031		19,367		68,743		53,451
Other income, net		390		291		1,376		1,779
Income before income taxes		25,421		19,658		70,119		55,230
Provision for income taxes		4,484		6,438		12,817		17,724
Net income	$	20,937	$	13,220	$	57,302	$	37,506
Net income per share:
Basic	$	0.77	$	0.50	$	2.13	$	1.41
Diluted	$	0.77	$	0.49	$	2.10	$	1.40
Shares used to compute net income per share:
Basic		27,038,585		26,617,349		26,963,205		26,600,174
Diluted		27,337,886		26,802,034		27,268,311		26,716,553
Comprehensive Income (net of tax)
Comprehensive income	$	20,058	$	14,875	$	55,298	$	42,510

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

2

Proto Labs, Inc.

Consolidated Statements of Cash Flows

(In thousands)

(Unaudited)

	Nine Months Ended
	September 30,
	2018			2017
Operating activities
Net income	$	57,302		$	37,506
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		19,520			13,539
Stock-based compensation expense		7,986			6,159
Deferred taxes		1,770			715
Gain on sale of business		(671	)		-
Amortization of held-to-maturity securities		336			851
Other		160			21
Changes in operating assets and liabilities:
Accounts receivable		(8,993	)		(10,679	)
Inventories		324			(188	)
Prepaid expenses and other		(2,058	)		(1,147	)
Income taxes		2,278			4,158
Accounts payable		980			1,387
Accrued liabilities and other		6,028			6,678
Net cash provided by operating activities		84,962			59,000
Investing activities
Purchases of property, equipment and other capital assets		(61,898	)		(24,164	)
Cash used for acquisitions, net of cash acquired		(90	)		-
Proceeds from sale of business		284			-
Purchases of marketable securities		(41,384	)		(20,037	)
Proceeds from maturities of marketable securities		44,721			34,090
Purchases of other assets and investments		(126	)		(514	)
Net cash used in investing activities		(58,493	)		(10,625	)
Financing activities
Payments on debt		(5,000	)		-
Proceeds from exercises of stock options and other		5,248			5,749
Repurchases of common stock		-			(4,410	)
Net cash provided by financing activities		248			1,339
Effect of exchange rate changes on cash and cash equivalents		(831	)		774
Net increase in cash and cash equivalents		25,886			50,488
Cash and cash equivalents, beginning of period		36,707			68,795
Cash and cash equivalents, end of period	$	62,593		$	119,283

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

3

Note 1 – Basis of Presentation

The unaudited interim Consolidated Financial Statements of Proto Labs, Inc. (Protolabs, the Company, we, us or our) have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. In the opinion of management, the accompanying financial statements reflect all adjustments necessary for a fair presentation of the Company’s statements of financial position, results of operations and cash flows for the periods presented. Except as otherwise disclosed herein, these adjustments consist of normal, recurring items. Operating results for interim periods are not necessarily indicative of results that may be expected for the fiscal year as a whole.

The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses, and the related disclosures at the date of the financial statements and during the reporting period. Actual results could materially differ from these estimates. For further information, refer to the audited Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 as filed with the Securities and Exchange Commission (SEC) on February 23, 2018.

The accompanying Consolidated Balance Sheet as of December 31, 2017 was derived from the audited Consolidated Financial Statements but does not include all disclosures required by U.S. GAAP for a full set of financial statements. This Form 10-Q should be read in conjunction with the Company’s Consolidated Financial Statements and Notes included in the Annual Report on Form 10-K filed on February 23, 2018 as referenced above.

Note 2 – Recent Accounting Pronouncements

Recently Adopted Accounting Pronouncements

During the first quarter of 2018, the Company adopted the Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (ASC 606). This ASU is a comprehensive new revenue recognition model that requires a company to recognize revenue from the transfer of goods or services to customers in an amount that reflects the consideration that the entity expects to receive in exchange for those goods or services. The Company has adopted the new revenue standard using the modified retrospective approach. The Company manufactures parts that have no alternative use to the Company since the parts are custom made to specific customer orders, and the Company believes there is a legally enforceable right to payment for performance completed to date on these manufactured parts. For those manufactured parts that meet these two criteria, the Company will recognize revenue over time. The transition adjustment recorded was an increase of $1.5 million to the Company’s retained earnings balance as of January 1, 2018.

During the first quarter of 2018, the Company adopted ASU 2017-09, Compensation – Stock Compensation, which is intended to provide clarity and reduce diversity in practice as well as cost and complexity when applying the guidance to a change to the terms or conditions of a share-based payment award. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements.

4

Recently Issued Accounting Pronouncements

In February 2016, the FASB issued ASU 2016-02, Leases, which introduces the balance sheet recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. The guidance will be effective for annual reporting periods beginning after December 15, 2018 and interim periods within those fiscal years with early adoption permitted. The Company expects to adopt the lease standard using the new transition option, which will allow the Company to continue to apply the legacy guidance in Accounting Standards Codification (ASC) 840, Leases, in the comparative periods presented in the year of adoption. The Company is in the process of executing its implementation plan and performing an assessment of its leasing arrangements and service contracts, as well as evaluating the impact of applying the practical expedients and accounting policy elections. The Company is evaluating the impact of the future adoption of this standard on its consolidated financial statements, but because the Company owns a majority of its buildings and significant assets, it does not expect the impact to be material. 

In January 2017, the FASB issued ASU 2017-04, Intangibles – Goodwill and Other, which is intended to simplify the subsequent measurement of goodwill. This guidance will be effective for impairment tests in fiscal years beginning after December 15, 2019 and interim periods within those fiscal years with early adoption permitted. The Company is evaluating the impact of future adoption of this guidance on its consolidated financial statements, but does not expect the impact to be material.

Note 3 – Revenue

The Company’s significant accounting policies are disclosed in Note 2 to the Consolidated Financial Statements included in its Annual Report on Form 10-K for the year ended December 31, 2017. Significant changes to the Company’s accounting policies as a result of adopting ASC 606 are discussed below:

Revenue Recognition

The Company provides quality, quick-turn prototyping and on-demand manufacturing services. As a result, the majority of revenue recognized in a reporting period is based on completed, invoiced contracts. The Company accounts for revenue in accordance with ASC 606, which the Company adopted on January 1, 2018, using the modified retrospective method. Results for reporting periods beginning after January 1, 2018 are presented under ASC 606, while prior period amounts are not adjusted and continue to be reported in accordance with the Company’s historic accounting under ASC 605. The Company recorded a net increase of $1.5 million to its retained earnings balance on January 1, 2018 due to the cumulative impact of adopting ASC 606. The impact of adopting ASC 606 was to increase revenue by $1.3 million and increase cost of revenue by $0.6 million for the three months ended September 30, 2018, and to increase accounts receivable by $1.3 million and decrease inventory by $0.6 million as of September 30, 2018. For the nine months ended September 30, 2018 the impact of adopting ASC 606 was to increase revenue by $1.5 million and increase cost of revenue by $0.7 million, as well as increase accounts receivable by $4.0 million and decrease inventory by $1.8 million as of September 30, 2018, which includes the transition adjustment of $1.5 million noted above.

A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account in ASC 606. The majority of the Company’s CNC machining, 3D printing, and sheet metal contracts have a single performance obligation. The majority of the Company’s injection molding contracts have multiple performance obligations including one obligation to produce the mold and a second obligation to produce parts. For injection molding contracts with multiple performance obligations, we allocate revenue to each performance obligation based on its relative standalone selling price. We generally determine standalone selling price based on the price charged to customers.

The Company manufactures parts that have no alternative use to the Company since the parts are custom made to specific customer orders, and the Company believes there is a legally enforceable right to payment for performance completed to date on these manufactured parts. For manufactured parts that meet these two criteria, the Company will recognize revenue over time. Revenue is recognized over time using the input method based on time in production to measure progress toward satisfying performance obligations.

Revenue by geographic region for the three and nine months ended September 30, 2018 and 2017 was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017		2018		2017
Revenue:
United States	$	90,732	$	67,490	$	261,253	$	191,019
Europe		21,273		18,094		61,431		51,224
Japan		3,425		2,521		10,143		8,069
Total revenue	$	115,430	$	88,105	$	332,827	$	250,312

5

Revenue by product line for the three and nine months ended September 30, 2018 and 2017 was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017		2018		2017
Revenue:
Injection Molding	$	53,681	$	49,480	$	156,610	$	144,187
CNC Machining		40,845		27,166		115,364		73,318
3D Printing		13,845		11,102		39,418		32,061
Sheet Metal		6,452		-		19,002		-
Other Revenue		607		357		2,433		746
Total revenue	$	115,430	$	88,105	$	332,827	$	250,312

The Company generally expenses sales commissions when incurred because the amortization period would have been one year or less. These costs are recorded within marketing and sales expenses. The value of unsatisfied performance obligations for contracts with an original expected length of one year or less is not material.

Note 4 – Net Income per Common Share

Basic net income per share is computed based on the weighted-average number of common shares outstanding. Diluted net income per share is computed based on the weighted-average number of common shares outstanding, increased by the number of additional shares that would have been outstanding had potentially dilutive common shares been issued and reduced by the number of shares the Company could have repurchased from the proceeds from issuance of the potentially dilutive shares. Potentially dilutive shares of common stock include stock options, restricted stock units and restricted stock awards granted under stock-based compensation plans and shares committed to be purchased under the employee stock purchase plan. Performance stock units are excluded from the calculation of dilutive potential common shares until the performance conditions have been satisfied.

The table below sets forth the computation of basic and diluted net income per share:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands, except share and per share amounts)	2018		2017		2018		2017
Net income	$	20,937	$	13,220	$	57,302	$	37,506
Basic - weighted-average shares outstanding:		27,038,585		26,617,349		26,963,205		26,600,174
Effect of dilutive securities:
Employee stock options and other		299,301		184,685		305,106		116,379
Diluted - weighted-average shares outstanding:		27,337,886		26,802,034		27,268,311		26,716,553
Net income per share:
Basic	$	0.77	$	0.50	$	2.13	$	1.41
Diluted	$	0.77	$	0.49	$	2.10	$	1.40

6

 Note 5 – Goodwill and Other Intangible Assets

There were no changes in the carrying amount of Goodwill during the three months ended September 30, 2018. The changes in the carrying amount of goodwill during the nine months ended September 30, 2018 were as follows: 

(in thousands)	Nine Months Ended September 30, 2018
Balance as of the beginning of the period	$	128,504
Goodwill acquired during the period		248
Balance as of the end of the period	$	128,752

The Company adjusted goodwill by $0.2 million during the nine months ended September 30, 2018 as a result of the final working capital adjustment for the acquisition of RAPID in November 2017.

Intangible Assets other than goodwill at September 30, 2018 and December 31, 2017 were as follows:

	September 30, 2018							December 31, 2017							Useful	Weighted Average
(in thousands)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net		Life (in years)	Useful Life Remaining (in years)
Intangible Assets with finite lives:
Marketing assets	$	930	$	(411	)	$	519	$	930	$	(341	)	$	589	10.0	5.5
Non-compete agreement		270		(202	)		68		270		(190	)		80	2.0 - 5.0	4.3
Trade secrets		250		(221	)		29		250		(183	)		67	5.0	0.5
Trade names		1,080		(405	)		675		1,080		-			1,080	2.0	1.3
Software technology		11,229		(694	)		10,535		8,229		-			8,229	10.0	9.3
Customer relationships		10,070		(2,183	)		7,887		10,070		(1,031	)		9,039	6.0 - 9.0	5.1
Total intangible assets	$	23,829	$	(4,116	)	$	19,713	$	20,829	$	(1,745	)	$	19,084

Amortization expense for intangible assets was $0.8 million and $0.1 million for the three months ended September 30, 2018 and 2017, respectively, and $2.4 million and $0.4 million for the nine months ended September 30, 2018 and 2017, respectively.

Estimated aggregated amortization expense based on the current carrying value of the amortizable intangible assets is as follows:

(in thousands)	Estimated Amortization Expense
Remaining 2018	$	843
2019		3,342
2020		2,786
2021		2,786
2022		2,786
Thereafter		7,170
Total estimated amortization expense	$	19,713

7

Note 6 – Fair Value Measurements

ASC 820, Fair Value Measurement (ASC 820), defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820 also establishes a fair value hierarchy that requires classification based on observable and unobservable inputs when measuring fair value. There are three levels of inputs that may be used to measure fair value:

Level 1—Quoted prices in active markets for identical assets or liabilities.

Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company’s cash consists of bank deposits. The Company’s cash equivalents measured at fair value consist of money market mutual funds. The Company determines the fair value of these investments using Level 1 inputs.

The following table summarizes financial assets as of September 30, 2018 and December 31, 2017 measured at fair value on a recurring basis: 

	September 30, 2018						December 31, 2017
(in thousands)	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Financial Assets:
Cash and cash equivalents
Money market mutual fund	$	193	$	-	$	-	$	3,034	$	-	$	-
Total	$	193	$	-	$	-	$	3,034	$	-	$	-

Note 7 – Marketable Securities

The Company invests in short-term and long-term agency, municipal, corporate, commercial paper and other debt securities. The securities are categorized as held-to-maturity and are recorded at amortized cost. Categorization as held-to-maturity is based on the Company’s ability and intent to hold these securities to maturity. The following table summarizes information regarding the Company’s short-term and long-term marketable securities as of September 30, 2018 and December 31, 2017:

	September 30, 2018
(in thousands)	Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. municipal securities	$	20,607	$	-	$	(74	)	$	20,533
Corporate debt securities		43,525		-		(153	)		43,372
U.S. government agency securities		22,197		-		(156	)		22,041
Certificates of deposit/time deposits		4,456		-		(29	)		4,427
Total marketable securities	$	90,785	$	-	$	(412	)	$	90,373

8

	December 31, 2017
(in thousands)	Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. municipal securities	$	28,364	$	-	$	(104	)	$	28,260
Corporate debt securities		29,806		-		(128	)		29,678
U.S. government agency securities		32,320		-		(199	)		32,121
Certificates of deposit/time deposits		3,968		-		(32	)		3,936
Total marketable securities	$	94,458	$	-	$	(463	)	$	93,995

Fair values for the corporate debt securities are primarily determined based on quoted market prices (Level 1). Fair values for the U.S. municipal securities, U.S. government agency securities, commercial paper and certificates of deposit are primarily determined using dealer quotes or quoted market prices for similar securities (Level 2).

The Company tests for other-than-temporary losses on a quarterly basis and has considered the unrealized losses indicated above to be temporary in nature. In reaching this conclusion, the Company considered the credit quality of the issuers of the debt securities as well as the Company’s intent to hold the investments to maturity and recover the full principal.

Classification of marketable securities as current or non-current is based upon the security’s maturity date as of the date of these financial statements.

The September 30, 2018 balance of held-to-maturity debt securities by contractual maturity is shown in the following table at amortized cost. Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.

	September 30,
(in thousands)	2018
Due in one year or less	$	57,561
Due after one year through five years		33,224
Total marketable securities	$	90,785

Note 8 – Inventory

Inventory consists primarily of raw materials, which are recorded at the lower of cost or market using the average-cost method, which approximates first-in, first-out (FIFO) cost. The Company periodically reviews its inventory for slow-moving, damaged and discontinued items and provides allowances to reduce such items identified to their recoverable amounts.

The Company’s inventory consisted of the following as of the dates indicated:

	September 30,			December 31,
(in thousands)	2018			2017
Raw materials	$	9,424		$	9,767
Work in process		532			1,998
Total inventory		9,956			11,765
Allowance for obsolescence		(348	)		(494	)
Inventory, net of allowance	$	9,608		$	11,271

9

Note 9 – Stock-Based Compensation

Under the Company’s 2012 Long-Term Incentive Plan, as amended (the 2012 Plan), the Company has the ability to grant stock options, stock appreciation rights (SARs), restricted stock, restricted stock units, other stock-based awards and cash incentive awards. Awards under the 2012 Plan have a maximum term of ten years from the date of grant. The compensation committee may provide that the vesting or payment of any award will be subject to the attainment of specified performance measures in addition to the satisfaction of any continued service requirements and the compensation committee will determine whether such measures have been achieved. The per-share exercise price of stock options and SARs granted under the 2012 Plan generally may not be less than the fair market value of a share of our common stock on the date of the grant.

Employee Stock Purchase Plan

The Company’s 2012 Employee Stock Purchase Plan (ESPP) allows eligible employees to purchase a variable number of shares of the Company’s common stock each offering period at a discount through payroll deductions of up to 15 percent of their eligible compensation, subject to plan limitations. The ESPP provides for six-month offering periods with a single purchase period ending May 15 and November 15, respectively. At the end of each offering period, employees are able to purchase shares at 85 percent of the lower of the fair market value of the Company’s common stock on the first trading day of the offering period or on the last trading day of the offering period.

Stock-Based Compensation Expense

Stock-based compensation expense was $3.0 million and $2.2 million for the three months ended September 30, 2018 and 2017, respectively, and $8.0 million and $6.2 million for the nine months ended September 30, 2018 and 2017, respectively.

Stock Options

The following table summarizes stock option activity during the nine months ended September 30, 2018:

				Weighted-
				Average
	Stock Options			Exercise Price
Options outstanding at December 31, 2017		399,397		$	51.14
Granted		36,258			110.59
Exercised		(152,110	)		39.31
Forfeited		(22,742	)		70.00
Options outstanding at September 30, 2018		260,803		$	64.66
Exercisable at September 30, 2018		126,008		$	51.25

The outstanding options generally have a term of ten years. For employees, options granted become exercisable ratably over the vesting period, which is generally a period from four to five years, beginning on the first anniversary of the grant date, subject to the employee’s continuing service to the Company. For directors, options generally become exercisable in full on the first anniversary of the grant date.

The weighted-average grant date fair value of options that were granted during the nine months ended September 30, 2018 was $50.08.

10

The following table provides the assumptions used in the Black-Scholes pricing model valuation of options during the nine months ended September 30, 2018 and 2017:

	Nine Months Ended September 30,
	2018	2017
Risk-free interest rate	2.52 - 3.07%	2.24%
Expected life (years)	6.25	6.50
Expected volatility	41.68 - 42.22%	44.68%
Expected dividend yield	0%	0%

As of September 30, 2018, there was $3.9 million of unrecognized compensation expense related to unvested stock options, which is expected to be recognized over a weighted-average period of 3.1 years.

Restricted Stock

Restricted stock awards are share-settled awards and restrictions lapse ratably over the vesting period, which is generally a period from four to five years, beginning on the first anniversary of the grant date, subject to the employee's continuing service to the Company. For directors, restrictions generally lapse in full on the first anniversary of the grant date. 

The following table summarizes restricted stock activity during the nine months ended September 30, 2018:

				Weighted-
				Average
				Grant Date
	Restricted			Fair Value
	Stock			Per Share
Restricted stock at December 31, 2017		334,608		$	63.29
Granted		106,760			115.41
Restrictions lapsed		(83,456	)		62.85
Forfeited		(25,661	)		65.73
Restricted stock at September 30, 2018		332,251		$	79.96

As of September 30, 2018, there was $23.1 million of unrecognized compensation expense related to non-vested restricted stock, which is expected to be recognized over a weighted-average period of 3.3 years. 

Performance Stock

Performance stock units (PSUs) are expressed in terms of a target number of PSUs, with anywhere between 0 percent and 150 percent of that target number capable of being earned and vesting at the end of a three-year performance period depending on the Company’s performance in the final year of the performance period and the award recipient’s continued employment.

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The following table summarizes performance stock activity during the nine months ended September 30, 2018: 

			Weighted-
			Average
			Grant Date
	Performance		Fair Value
	Stock		Per Share
Performance stock at December 31, 2017		25,707	$	58.35
Granted		20,006		105.75
Restrictions lapsed		-		-
Performance change		6,427		58.35
Forfeited		-		-
Performance stock at September 30, 2018		52,140	$	76.54

As of September 30, 2018, there was $2.5 million of unrecognized compensation expense related to non-vested performance stock, which is expected to be recognized over a weighted-average period of 2.0 years. 

Employee Stock Purchase Plan

The following table presents the assumptions used to estimate the fair value of the ESPP during the nine months ended September 30, 2018 and 2017:

	Nine Months Ended September 30,
	2018	2017
Risk-free interest rate	1.48 - 2.06%	0.59 - 0.97%
Expected life (months)	6.00	6.00
Expected volatility	24.49 - 31.50%	34.51 - 39.51%
Expected dividend yield	0%	0%

Note 10 – Accumulated Other Comprehensive Loss

Other comprehensive income (loss) is comprised entirely of foreign currency translation adjustments. The following table presents the changes in accumulated other comprehensive income (loss) balances during the three and nine months ended September 30, 2018 and 2017:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(in thousands)	2018			2017			2018			2017
Foreign currency translation adjustments
Balance at beginning of period	$	(6,359	)	$	(7,404	)	$	(5,234	)	$	(10,753	)
Other comprehensive income (loss) before reclassifications		(879	)		1,655			(2,004	)		5,004
Amounts reclassified from accumulated other comprehensive loss		-			-			-			-
Net current-period other comprehensive income (loss)		(879	)		1,655			(2,004	)		5,004
Balance at end of period	$	(7,238	)	$	(5,749	)	$	(7,238	)	$	(5,749	)

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Note 11 – Income Taxes

The Company is subject to income tax in multiple jurisdictions and the use of estimates is required to determine the provision for income taxes. For the three months ended September 30, 2018 and 2017, the Company recorded an income tax provision of $4.5 million and $6.4 million, respectively. For the nine months ended September 30, 2018 and 2017, the Company recorded an income tax provision of $12.8 million and $17.7 million, respectively. The income tax provision is based on the estimated annual effective tax rate for the year applied to pre-tax income. The effective income tax rate for the three months ended September 30, 2018 was 17.6 percent compared to 32.8 percent in the same period of the prior year. The effective tax rate decreased by 15.2 percent for the three months ended September 30, 2018 when compared to the same period in 2017 primarily due to the impact of tax reform and benefits from the vesting of restricted stock and the exercise of stock options. The effective income tax rate for the nine months ended September 30, 2018 was 18.3 percent compared to 32.1 percent in the same period of the prior year. The effective tax rate decreased by 13.8 percent for the nine months ended September 30, 2018 when compared to the same period in 2017 primarily due to the impact of tax reform and benefits from the vesting of restricted stock and the exercise of stock options.

The Tax Cuts and Jobs Act (the Act) was enacted on December 22, 2017. The Act reduces the U.S. federal corporate tax rate from 35 percent to 21 percent, requires companies to pay a transition tax on earnings of certain foreign subsidiaries that were previously tax-deferred and creates new taxes on certain foreign-sourced earnings. The Company has applied the guidance in ASU 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118, when accounting for the enactment-date effects of the Act. As of September 30, 2018, the Company had not completed its accounting for the tax effects of the Act, as the Company is in the process of analyzing certain aspects of the Act, obtaining information, and refining its calculations of the Act's impact. There have been no material measurement period adjustments made during the three and nine months ended September 30, 2018 related to the provisional amounts recorded and disclosed in our Annual Report on Form 10-K for the year ended December 31, 2017. The Company expects to complete the accounting for the tax effects of the Act during 2018.

The effective income tax rate for the three and nine months ended September 30, 2018 differs from the U.S. federal statutory rate of 21.0 percent due primarily to the mix of income earned in domestic and foreign tax jurisdictions and deductions for which the Company qualifies.

The Company had reserves against unrecognized tax benefits totaling $3.9 million at September 30, 2018 and $4.2 million at December 31, 2017, all of which, if recognized, would affect the Company’s effective tax rate. The Company recognizes interest and penalties related to income tax matters in income tax expense, and reports the liability in current or long-term income taxes payable as appropriate.

Note 12 – Segment Reporting

The Company’s reportable segments are based on the internal reporting used by the Company’s Chief Executive Officer, who is the chief operating decision maker (CODM), to assess operating performance and make decisions about the allocation of resources. The Corporate Unallocated and Japan category includes non-reportable segments, as well as research and development and general and administrative costs that the Company does not allocate directly to its operating segments.

Intercompany transactions primarily relate to intercontinental activity and have been eliminated and are excluded from the reported amounts. The difference between income from operations and pre-tax income relates to foreign currency-related gains and losses and interest income on cash balances and investments, which are not allocated to business segments. 

Revenue and income from operations by reportable segment for the three and nine months ended September 30, 2018 and 2017 were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017		2018		2017
Revenue:
United States	$	90,732	$	67,490	$	261,253	$	191,019
Europe		21,273		18,094		61,431		51,224
Japan		3,425		2,521		10,143		8,069
Total revenue	$	115,430	$	88,105	$	332,827	$	250,312

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	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2018			2017			2018			2017
Income from Operations:
United States	$	31,726		$	26,903		$	92,258		$	76,973
Europe		5,478			3,251			12,879			9,626
Corporate Unallocated and Japan		(12,173	)		(10,787	)		(36,394	)		(33,148	)
Total Income from Operations	$	25,031		$	19,367		$	68,743		$	53,451

Total long-lived assets at September 30, 2018 and December 31, 2017 were as follows:

	September 30,		December 31,
(in thousands)	2018		2017
Total long-lived assets:
United States	$	168,903	$	125,308
Europe		33,783		33,691
Japan		7,367		7,441
Total Assets	$	210,053	$	166,440

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our unaudited consolidated financial statements and related notes appearing elsewhere in this Quarterly Report on Form 10-Q and our Annual Report on Form 10-K for the year ended December 31, 2017.

Forward-Looking Statements

Statements contained in this report regarding matters that are not historical or current facts are “forward-looking statements” within the meaning of The Private Securities Litigation Reform Act of 1995. In some cases, you can identify forward-looking statements by the following words: “may,” “will,” “could,” “would,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “project,” “potential,” “continue,” “ongoing” or the negative of these terms or other comparable terminology, although not all forward-looking statements contain these words. These statements involve known and unknown risks, uncertainties and other factors that may cause our results to be materially different than those expressed or implied in such statements. Certain of these risk factors and others are described in Item 1A. “Risk Factors” of our most recent Annual Report on Form 10-K as filed with the SEC. Other unknown or unpredictable factors also could have material adverse effects on our future results. We cannot guarantee future results, levels of activity, performance or achievements. Accordingly, you should not place undue reliance on these forward-looking statements. Finally, we expressly disclaim any intent or obligation to update any forward-looking statements to reflect subsequent events or circumstances.

Overview

We are the world’s largest and fastest digital manufacturer of custom prototypes and on-demand production parts. We manufacture prototypes and low-volume production parts for companies worldwide, who are under increasing pressure to bring their finished products to market faster than their competition. We utilize injection molding, computer numerical control (CNC) machining, 3D printing and sheet metal fabrication to manufacture custom parts for our customers. Our proprietary technology eliminates most of the time-consuming and expensive skilled labor conventionally required to quote and manufacture parts. Our customers conduct nearly all of their business with us over the Internet. We target our products to the millions of product developers and engineers who use three-dimensional computer-aided design (3D CAD) software to design products across a diverse range of end-markets.

Our primary manufacturing product lines currently include Injection Molding, CNC Machining, 3D Printing and Sheet Metal. We continually seek to expand the range of sizes and geometric complexity of the parts we can make with these processes, to extend the variety of materials we are able to support and to identify additional manufacturing processes to which we can apply our technology in order to better serve the evolving preferences and needs of product developers and engineers.

Injection Molding

Our Injection Molding product line uses our 3D CAD-to-CNC machining technology for the automated design and manufacture of molds, which are then used to produce custom plastic and liquid silicone rubber injection-molded parts and over-molded and insert-molded injection-molded parts on commercially available equipment. Our Injection Molding product line works best for on-demand production, bridge tooling, pilot runs and functional prototyping. Our affordable aluminum molds and quick turnaround times help reduce design risk and limit overall production costs for product developers and engineers. Prototype quantities typically range from 25 to 100 parts. Because we retain possession of the molds, customers who need short-run production often come back to Protolabs’ Injection Molding product line for additional quantities. They do so to support pilot production for product testing, while their tooling for high-volume production is being prepared, because they need on-demand manufacturing due to disruptions in their manufacturing process, because their product requires limited annual quantity or because they need end-of-life production support. In 2017, we launched an on-demand manufacturing injection molding service. This service utilizes our existing processes, but is designed to fulfill the needs of customers with on-going production needs, typically in annual volumes of less than 10,000 parts.

CNC Machining

Our CNC Machining product line uses commercially available CNC machines to offer milling and turning. CNC milling is a manufacturing process that cuts plastic and metal blocks into one or more custom parts based on the 3D CAD model uploaded by the product developer or engineer. CNC turning with live tooling combines both lathe and mill capabilities to machine parts with cylindrical features from metal rod stock. Our efficiencies derive from the automation of the programming of these machines and a proprietary fixturing process.

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Quick-turn CNC machining works best for prototyping, form and fit testing, jigs and fixtures and functional components for end-use applications. The CNC Machining product line is well suited to produce small quantities, typically in the range of one to 200 parts.

3D Printing

Our 3D Printing product line includes stereolithography, selective laser sintering, direct metal laser sintering, Multi Jet Fusion and PolyJet processes, which offer customers a wide-variety of high-quality, precision rapid prototyping and low-volume production. These processes create parts with a high level of accuracy, detail, strength and durability. Industrial 3D Printing is best suited for functional prototypes, complex designs and end-use applications produced in small quantities, typically in the range of one to 50 parts.

Sheet Metal

Our Sheet Metal product line includes quick-turn and e-commerce-enabled custom sheet metal parts, which provides customers with prototype and low-volume production parts. The rapid prototype sheet metal process is most often used when form, fit and function are all a priority. Our manufacturing process uses customer 3D CAD models uploaded by the product developer or engineer to fabricate quick-turn prototype sheet metal or short-run production parts. The Sheet Metal product line is well suited to produce quantities in the range of one to 500 parts.

Key Financial Measures and Trends

Revenue

Our operations are comprised of three geographic operating segments in the United States, Europe and Japan. Revenue is derived from our Injection Molding, CNC Machining, 3D Printing and Sheet Metal product lines. Injection Molding revenue consists of sales of custom injection molds and injection-molded parts. CNC Machining revenue consists of sales of CNC-machined custom parts. 3D Printing revenue consists of sales of 3D-printed parts. Sheet Metal revenue consists of sales of fabricated sheet metal custom parts. Our historical and current efforts to increase revenue have been directed at expanding the breadth of our product offerings, gaining new customers and selling to our existing customer base by increasing marketing and selling activities, including:

● expanding the breadth and scope of each of our product lines by adding more sizes and materials to our offerings;

● the introduction of our 3D Printing product line through our acquisition of FineLine in 2014;

● expanding internationally through our acquisition of Alphaform in October 2015;

● the introduction of our Sheet Metal product line through our acquisition of RAPID in 2017; and

● continuously improving the usability of our product lines such as our web-centric applications.

During the three months ended September 30, 2018, we served 20,792 unique product developers and engineers who purchased our products through our web-based customer interface, an increase of 23.0% over the same period in 2017. During the nine months ended September 30, 2018, we served 38,823 unique product developers and engineers who purchased our products through our web-based customer interface, an increase of 24.0% over the same period in 2017.

Cost of Revenue, Gross Profit and Gross Margin

Cost of revenue consists primarily of raw materials, equipment depreciation, employee compensation, benefits, stock-based compensation, facilities costs and overhead allocations associated with the manufacturing process for molds and custom parts. We expect cost of revenue to increase in absolute dollars, but remain relatively constant as a percentage of total revenue.

We define gross profit as our revenue less our cost of revenue, and we define gross margin as gross profit expressed as a percentage of revenue. Our gross profit and gross margin are affected by many factors, including our mix of revenue by product line and geography, pricing, sales volume and manufacturing costs, the costs associated with increasing production capacity, and foreign exchange rates.

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Operating Expenses

Operating expenses consist of marketing and sales, research and development and general and administrative expenses. Personnel-related costs are the most significant component in each of these categories.

Our recent growth in operating expenses is mainly due to recent acquisitions and higher headcounts to support our growth and expansion, and we expect that trend to continue. Our business strategy is to continue to be a leading online and technology-enabled manufacturer of quick-turn, on-demand injection-molded, CNC-machined, CNC-turned, 3D-printed and sheet metal custom parts for prototyping and low-volume production. In order to achieve our goals, we anticipate continued substantial investments in technology and personnel, resulting in increased operating expenses.

Marketing and sales. Marketing and sales expense consists primarily of employee compensation, benefits, commissions, stock-based compensation, marketing programs such as electronic, print and pay-per-click advertising, trade shows and other related overhead. We expect sales and marketing expense to increase in the future as we increase the number of marketing and sales professionals and marketing programs targeted to increase our customer base and grow revenue.

Research and development. Research and development expense consists primarily of personnel and outside service costs related to the development of new processes and product lines, enhancement of existing product lines, development of software for internal use, maintenance of internally developed software, quality assurance and testing. Costs for internal use software are evaluated by project and capitalized where appropriate under ASC 350-40, Intangibles — Goodwill and Other, Internal-Use Software. We expect research and development expense to increase in the future as we seek to enhance and expand our product line offerings and supporting business systems.

General and administrative. General and administrative expense consists primarily of employee compensation, benefits, stock-based compensation, professional service fees related to accounting, tax and legal and other related overhead. We expect general and administrative expense to increase in the future as we continue to grow and expand as a global organization.

Other Income, net

Other income, net primarily consists of foreign currency-related gains and losses and interest income on cash balances and investments. Our foreign currency-related gains and losses will vary depending upon movements in underlying exchange rates. Our interest income will vary each reporting period depending on our average cash balances during the period, composition of our marketable security portfolio and the current level of interest rates.

Provision for Income Taxes

Provision for income taxes is comprised of federal, state, local and foreign taxes based on pre-tax income. On December 22, 2017, the Tax Cuts and Jobs Act was signed into law in the United States. As a result, many provisions will affect our tax rate in future years. Some provisions, such as the reduction to the U.S. corporate tax rate from 35% to 21%, beginning in 2018, will reduce our effective tax rate in future years. Other provisions taken in isolation, such as the elimination of the Domestic Production Activities Deduction, will likely result in an increase to our tax rate. Overall, we anticipate our effective tax rate will be lower in 2018 and beyond than in recent periods based on the current tax laws.

17

Results of Operations

The following table summarizes our results of operations and the related changes for the periods indicated. The results below are not necessarily indicative of the results for future periods. 

	Three Months Ended September 30,								Change						Nine Months Ended September 30,								Change
(dollars in thousands)	2018				2017				$			%			2018				2017				$			%
Revenue	$	115,430	100.0		$	88,105	100.0	%	$	27,325			31.0		$	332,827	100.0		$	250,312	100.0		$	82,515			33.0
Cost of revenue		53,027	45.9			38,793	44.0			14,234			36.7			153,303	46.1			109,358	43.7			43,945			40.2
Gross profit		62,403	54.1			49,312	56.0			13,091			26.5			179,524	53.9			140,954	56.3			38,570			27.4
Operating expenses:
Marketing and sales		16,818	14.6			13,846	15.7			2,972			21.5			50,947	15.3			41,463	16.6			9,484			22.9
Research and development		7,458	6.5			5,877	6.7			1,581			26.9			21,155	6.4			17,784	7.1			3,371			19.0
General and administrative		13,096	11.3			10,222	11.6			2,874			28.1			38,679	11.6			28,256	11.3			10,423			36.9
Total operating expenses		37,372	32.4			29,945	34.0			7,427			24.8			110,781	33.3			87,503	35.0			23,278			26.6
Income from operations		25,031	21.7			19,367	22.0			5,664			29.2			68,743	20.6			53,451	21.3			15,292			28.6
Other income (expense), net		390	0.3			291	0.3			99			34.0			1,376	0.4			1,779	0.7			(403	)		(22.7	)
Income before income taxes		25,421	22.0			19,658	22.3			5,763			29.3			70,119	21.0			55,230	22.0			14,889			27.0
Provision for income taxes		4,484	3.9			6,438	7.3			(1,954	)		(30.4	)		12,817	3.8			17,724	7.1			(4,907	)		(27.7	)
Net income	$	20,937	18.1	%	$	13,220	15.0	%	$	7,717			58.4	%	$	57,302	17.2	%	$	37,506	14.9	%	$	19,796			52.8	%

Stock-based compensation expense included in the statements of operations data above for the three and nine months ended September 30, 2018 and 2017 was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollars in thousands)	2018		2017		2018		2017
Stock options and restricted stock	$	2,728	$	2,063	$	7,415	$	5,706
Employee stock purchase plan		225		138		571		453
Total stock-based compensation expense	$	2,953	$	2,201	$	7,986	$	6,159
Cost of revenue	$	446	$	263	$	1,096	$	698
Operating expenses:
Marketing and sales		560		417		1,380		1,024
Research and development		419		295		1,109		796
General and administrative		1,528		1,226		4,401		3,641
Total stock-based compensation expense	$	2,953	$	2,201	$	7,986	$	6,159

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Comparison of Three Months Ended September 30, 2018 and 2017

Revenue

Revenue by reportable segment and the related changes for the three months ended September 30, 2018 and 2017 were as follows:

	Three Months Ended September 30,
	2018					2017					Change
(dollars in thousands)	$		% of Total Revenue			$		% of Total Revenue			$		%
Revenue
United States	$	90,732		78.6	%	$	67,490		76.6	%	$	23,242		34.4	%
Europe		21,273		18.4			18,094		20.5			3,179		17.6
Japan		3,425		3.0			2,521		2.9			904		35.9
Total revenue	$	115,430		100.0	%	$	88,105		100.0	%	$	27,325		31.0	%

Our revenue increased $27.3 million, or 31.0%, for the three months ended September 30, 2018 compared to the same period in 2017. By reportable segment, revenue in the United States increased $23.2 million, or 34.4% for the three months ended September 30, 2018 compared to the same period in 2017. Revenue growth in the United States was partially attributable to the acquisition of RAPID in November 2017. Revenue in Europe increased $3.2 million, or 17.6%, and revenue in Japan increased $0.9 million, or 35.9%, in each case for the three months ended September 30, 2018 compared to the same period in 2017.

Our revenue growth during the three months ended September 30, 2018 was the result of an increase in the volume of the product developers and engineers we served through our web-based customer interface and the acquisition of RAPID. During the three months ended September 30, 2018, we served 20,792 unique product developers and engineers through our web-based customer interface, an increase of 23.0% over the same period in 2017.

Our revenue increases were primarily driven by increases in sales personnel and marketing activities. Our sales personnel focus on gaining new customer accounts and expanding the depth and breadth of existing customer accounts. Our marketing personnel focus on marketing activities that result in the greatest number of customer leads to support sales activity. International revenue was negatively impacted by $0.2 million during the three months ended September 30, 2018 compared to the same period in 2017 as a result of foreign currency movements, primarily the weakening of the British Pound and Euro relative to the Dollar.

Revenue by product line and the related changes for the three months ended September 30, 2018 and 2017 were as follows:

	Three Months Ended September 30,
	2018					2017					Change
(dollars in thousands)	$		% of Total Revenue			$		% of Total Revenue			$		%
Revenue
Injection Molding	$	53,681		46.5	%	$	49,480		56.2	%	$	4,201		8.5	%
CNC Machining		40,845		35.4			27,166		30.8			13,679		50.4
3D Printing		13,845		12.0			11,102		12.6			2,743		24.7
Sheet Metal		6,452		5.6			-		-			6,452		*
Other Revenue		607		0.5			357		0.4			250		*
Total revenue	$	115,430		100.0	%	$	88,105		100.0	%	$	27,325		31.0	%

*Percentage change not meaningful

By product line, our revenue growth was driven by an 8.5% increase in Injection Molding revenue, a 50.4% increase in CNC Machining revenue and a 24.7% increase in 3D Printing revenue, as well as a $0.3 million increase in Other Revenue, in each case for the three months ended September 30, 2018 compared to the same period in 2017. Revenue growth in our CNC Machining, Sheet Metal and Other product lines was partially attributable to the acquisition of RAPID in November 2017.

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Cost of Revenue, Gross Profit and Gross Margin

Cost of Revenue. Cost of revenue increased $14.2 million, or 36.7%, for the three months ended September 30, 2018 compared to the same period in 2017, which was faster than the rate of revenue increase of 31.0% for the three months ended September 30, 2018 compared to the same period in 2017. The increase in cost of revenue resulted from the growth of the business, including via the RAPID acquisition, and was due to raw material and production cost increases of $4.1 million, an increase in direct labor headcount resulting in personnel and related cost increases of $8.0 million and equipment and facility-related cost increases of $2.1 million to support increased sales volumes.

Gross Profit and Gross Margin. Gross profit increased from $49.3 million in the three months ended September 30, 2017 to $62.4 million in the three months ended September 30, 2018 primarily due to an increase in revenue. Gross margin decreased from 56.0% in the three months ended September 30, 2017 to 54.1% in the three months ended September 30, 2018 due to the timing and mix of revenue, with the RAPID acquisition being the primary driver of the reduction in gross margin.

Operating Expenses, Other Income, net and Provision for Income Taxes

Marketing and Sales. Marketing and sales expenses increased $3.0 million, or 21.5%, during the three months ended September 30, 2018 compared to the same period in 2017 due primarily to an increase in headcount resulting in personnel and related cost increases of $2.5 million as well as marketing program cost increases of $0.5 million.

Research and Development. Our research and development expenses increased $1.6 million, or 26.9%, during the three months ended September 30, 2018 compared to the same period in 2017 due to an increase in headcount resulting in personnel and related cost increases of $1.5 million and professional services increases of $0.1.

General and Administrative. Our general and administrative expenses increased $2.9 million, or 28.1%, during the three months ended September 30, 2018 compared to the same period in 2017 due to an increase in headcount resulting in personnel and related cost increases of $0.8 million, stock based compensation cost increases of $0.3 million, amortization cost increases of $0.7 million and administrative cost increases of $1.1 million.

Other Income, net. We recognized other income, net of $0.4 million for the three months ended September 30, 2018, an increase of $0.1 million compared to other income, net of $0.3 million for the three months ended September 30, 2017. Other income, net for the three months ended September 30, 2018 primarily consisted of $0.5 million in interest income on investments and a $0.1 million gain on foreign currency, which was partially offset by a $0.2 million loss on the sale of an asset. Other income, net for the three months ended September 30, 2017 primarily consisted of $0.4 million in interest income on investments, which was partially offset by a $0.1 million loss on foreign currency.

Provision for Income Taxes. Our effective tax rate of 17.6% for the three months ended September 30, 2018 decreased 15.2% compared to 32.8% for the same period in 2017. The decrease in the effective tax rate is primarily due to the Tax Cuts and Jobs Act that went into effect in 2018 and benefits from the vesting of restricted stock and the exercise of stock options. Our income tax provision decreased by $1.9 million to $4.5 million for the three months ended September 30, 2018 compared to our income tax provision of $6.4 million for the three months ended September 30, 2017.

20

Comparison of Nine Months Ended September 30, 2018 and 2017

Revenue

Revenue by reportable segment and the related changes for the nine months ended September 30, 2018 and 2017 were as follows:

	Nine Months Ended September 30,
	2018					2017					Change
(dollars in thousands)	$		% of Total Revenue			$		% of Total Revenue			$		%
Revenue
United States	$	261,253		78.5	%	$	191,019		76.3	%	$	70,234		36.8	%
Europe		61,431		18.5			51,224		20.5			10,207		19.9
Japan		10,143		3.0			8,069		3.2			2,074		25.7
Total revenue	$	332,827		100.0	%	$	250,312		100.0	%	$	82,515		33.0	%

Our revenue increased $82.5 million, or 33.0%, for the nine months ended September 30, 2018 compared to the same period in 2017. By reportable segment, revenue in the United States increased $70.2 million, or 36.8% for the nine months ended September 30, 2018 compared to the same period in 2017. Revenue growth in the United States was partially attributable to the acquisition of RAPID in November 2017. Revenue in Europe increased $10.2 million, or 19.9%, and revenue in Japan increased $2.1 million, or 25.7%, in each case for the nine months ended September 30, 2018 compared to the same period in 2017.

Our revenue growth during the nine months ended September 30, 2018 was the result of an increase in the volume of the product developers and engineers we served through our web-based customer interface and the acquisition of RAPID. During the nine months ended September 30, 2018, we served 38,823 unique product developers and engineers through our web-based customer interface, an increase of 24.0% over the same period in 2017.

Our revenue increases were primarily driven by increases in sales personnel and marketing activities. Our sales personnel focus on gaining new customer accounts and expanding the depth and breadth of existing customer accounts. Our marketing personnel focus on marketing activities that result in the greatest number of customer leads to support sales activity. International revenue was positively impacted by $4.0 million during the nine months ended September 30, 2018 compared to the same period in 2017 as a result of foreign currency movements, primarily the strengthening of the British Pound and Euro relative to the Dollar.

Revenue by product line and the related changes for the nine months ended September 30, 2018 and 2017 were as follows:

	Nine Months Ended September 30,
	2018					2017					Change
(dollars in thousands)	$		% of Total Revenue			$		% of Total Revenue			$		%
Revenue
Injection Molding	$	156,610		47.1	%	$	144,187		57.6	%	$	12,423		8.6	%
CNC Machining		115,364		34.7			73,318		29.3			42,046		57.3
3D Printing		39,418		11.8			32,061		12.8			7,357		22.9
Sheet Metal		19,002		5.7			-		-			19,002		*
Other Revenue		2,433		0.7			746		0.3			1,687		*
Total revenue	$	332,827		100.0	%	$	250,312		100.0	%	$	82,515		33.0	%

*Percentage change not meaningful

By product line, our revenue growth was driven by an 8.6% increase in Injection Molding revenue, a 57.3% increase in CNC Machining revenue and a 22.9% increase in 3D Printing revenue, as well as a $1.7 million increase in Other Revenue, in each case for the nine months ended September 30, 2018 compared to the same period in 2017. Revenue growth in our CNC Machining, Sheet Metal and Other product lines was partially attributable to the acquisition of RAPID in November 2017.

21

Cost of Revenue, Gross Profit and Gross Margin

Cost of Revenue. Cost of revenue increased $44.0 million, or 40.2%, for the nine months ended September 30, 2018 compared to the same period in 2017, which was faster than the rate of revenue increase of 33.0% for the nine months ended September 30, 2018 compared to the same period in 2017. The increase in cost of revenue resulted from the growth of the business, including via the RAPID acquisition, and was due to raw material and production cost increases of $13.1 million, an increase in direct labor headcount resulting in personnel and related cost increases of $24.2 million and equipment and facility-related cost increases of $6.7 million to support increased sales volumes.

Gross Profit and Gross Margin. Gross profit increased from $141.0 million in the nine months ended September 30, 2017 to $179.5 million in the nine months ended September 30, 2018, primarily due to an increase in revenue. Gross margin decreased from 56.3% in the nine months ended September 30, 2017 to 53.9% in the nine months ended September 30, 2018 due to the timing and mix of revenue, with the RAPID acquisition being the primary driver of the reduction in gross margin.

Operating Expenses, Other Income, net and Provision for Income Taxes

Marketing and Sales. Marketing and sales expenses increased $9.5 million, or 22.9%, during the nine months ended September 30, 2018 compared to the same period in 2017 due primarily to an increase in headcount resulting in personnel and related cost increases of $8.3 million as well as marketing program cost increases of $1.2 million.

Research and Development. Our research and development expenses increased $3.4 million, or 19.0%, during the nine months ended September 30, 2018 compared to the same period in 2017 due to an increase in headcount resulting in personnel and related cost increases of $3.4 million and professional services cost increases of $0.3 million, which were partially offset by a decrease in operating costs of $0.3 million.

General and Administrative. Our general and administrative expenses increased $10.4 million, or 36.9%, during the nine months ended September 30, 2018 compared to the same period in 2017 due to an increase in headcount resulting in personnel and related cost increases of $3.2 million, stock based compensation cost increases of $0.8 million, professional services cost increases of $0.4 million, amortization cost increases of $2.0 million and administrative cost increases of $4.0 million.

Other Income, net. We recognized other income, net of $1.4 million for the nine months ended September 30, 2018, a decrease of $0.4 million compared to other income, net of $1.8 million for the nine months ended September 30, 2017. Other income, net for the nine months ended September 30, 2018 primarily consisted of $1.1 million in interest income on investments and a $0.7 million gain on our sale of RAPID Wire & Cable, LLC, which was partially offset by a $0.2 million loss on foreign currency and a $0.2 million loss on the sale of an asset. Other income, net for the nine months ended September 30, 2017 primarily consisted of $1.1 million in interest income on investments, a $0.4 million favorable legal settlement and a $0.3 million gain on foreign currency.

Provision for Income Taxes. Our effective tax rate of 18.3% for the nine months ended September 30, 2018 decreased 13.8% compared to 32.1% for the same period in 2017. The decrease in the effective tax rate is primarily due to the Tax Cuts and Jobs Act that went into effect in 2018 and benefits from the vesting of restricted stock and the exercise of stock options. Our income tax provision decreased by $4.9 million to $12.8 million for the nine months ended September 30, 2018 compared to our income tax provision of $17.7 million for the nine months ended September 30, 2017.

Liquidity and Capital Resources

Cash Flows

The following table summarizes our cash flows during the nine months ended September 30, 2018 and 2017:

	Nine Months Ended September 30,
(dollars in thousands)	2018			2017
Net cash provided by operating activities	$	84,962		$	59,000
Net cash used in investing activities		(58,493	)		(10,625	)
Net cash provided by financing activities		248			1,339
Effect of exchange rates on cash and cash equivalents		(831	)		774
Net increase in cash and cash equivalents	$	25,886		$	50,488

22

Sources of Liquidity

Historically, we have primarily financed our operations and capital expenditures through cash flow from operations. We also have a line of credit facility in place, which we recently utilized in connection with our acquisitions at the end of 2017, and repaid in the three months ended March 31, 2018. We had cash and cash equivalents of $62.6 million as of September 30, 2018, an increase of $25.9 million from December 31, 2017. The increase in our cash was primarily due to cash generated through operations and proceeds from maturities of marketable securities, which were partially offset by investing activity and payments on debt.

Cash Flows from Operating Activities

Cash flows from operating activities were $85.0 million during the nine months ended September 30, 2018 and primarily consisted of net income of $57.3 million, adjusted for certain non-cash items, including depreciation and amortization of $19.5 million, stock-based compensation expense of $8.0 million, deferred taxes of $1.8 million, amortization of held-to-maturity securities of $0.3 million and gain on sale of business of $0.7 million. Cash flows from operating activities increased $26.0 million during the nine months ended September 30, 2018 compared to the same period in 2017, primarily due to increases in net income of $19.8 million mostly driven by general growth of the business and a benefit from the decrease in our effective tax rate, depreciation and amortization of $6.0 million driven by an increase in capital investments, an increase in stock-based compensation expense of $1.8 million, an increase in deferred taxes of $1.1 million, and an increase in other adjustments of $0.1 million primarily due to changes in foreign currency. These increases were partially offset by changes in operating assets and liabilities of $1.6 million driven by timing of cash receipts and payments, a decrease in amortization of held-to-maturity securities of $0.5 million, and a gain on the sale of businesses of $0.7 million.

Cash flows from operating activities were $59.0 million during the nine months ended September 30, 2017 and primarily consisted of net income of $37.5 million, adjusted for certain non-cash items, including depreciation and amortization of $13.5 million, stock-based compensation expense of $6.2 million, deferred taxes of $0.7 million and amortization of held-to-maturity securities of $0.9 million. 

Cash Flows from Investing Activities

Cash used in investing activities was $58.5 million during the nine months ended September 30, 2018, consisting of $61.9 million for the purchases of property, equipment and other capital assets, $41.4 million for the purchases of marketable securities, and $0.1 million in cash used for acquisitions, which were partially offset by $44.7 million in proceeds from maturities of marketable securities and $0.2 million in proceeds from the sale of businesses.

Cash used in investing activities was $10.6 million during the nine months ended September 30, 2017, consisting of $24.2 million for the purchases of property, equipment and other capital assets, $20.0 million for the purchases of marketable securities and $0.5 million for the purchases of other investments, which were partially offset by $34.1 million in proceeds from maturities of marketable securities.

23

Cash Flows from Financing Activities

Cash provided by financing activities was $0.3 million during the nine months ended September 30, 2018, consisting of proceeds from exercises of stock options of $5.3 million, which were partially offset by payments on debt of $5.0 million.

Cash provided by financing activities was $1.3 million during the nine months ended September 30, 2017, consisting of proceeds from exercises of stock options of $5.7 million, which were partially offset by repurchases of common stock of $4.4 million.

Off-Balance Sheet Arrangements

Since our inception, we have not engaged in any off-balance sheet arrangements, including the use of structured finance, special purpose entities or variable interest entities.

Critical Accounting Policies and Use of Estimates

We have adopted various accounting policies to prepare the Consolidated Financial Statements in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP). Our significant accounting policies are disclosed in Note 2 to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2017. See Note 3 to the Consolidated Financial Statements appearing in Part I, Item 1 in this Quarterly Report on Form 10-Q for significant changes to the Company’s accounting policies as a result of adopting ASC 606.

Recent Accounting Pronouncements

For information on recent accounting pronouncements, see Note 2 to the Consolidated Financial Statements appearing in Part I, Item 1 in this Quarterly Report on Form 10-Q.

24

Item 3. Quantitative and Qualitative Disclosures about Market Risk

Foreign Currency Risk

As a result of our foreign operations, we have revenue, expenses, assets and liabilities that are denominated in foreign currencies. We generate revenue and incur production costs and operating expenses in British Pounds, Euros and Japanese Yen.

Our operating results and cash flows are adversely impacted when the United States Dollar appreciates relative to foreign currencies. Additionally, our operating results and cash flows are adversely impacted when the British Pound appreciates relative to the Euro. As we expand internationally, our results of operations and cash flows will become increasingly subject to changes in foreign currency exchange rates.

We have not used forward contracts or currency borrowings to hedge our exposure to foreign currency risk. Foreign currency risk can be assessed by estimating the change in results of operations or financial position resulting from a hypothetical 10% adverse change in foreign exchange rates. We believe such a change would generally not have a material impact on our financial position, but could have a material impact on our results of operations. We recognized foreign currency gains of $0.1 million in the three months ended September 30, 2018 and foreign currency losses of $0.2 million in the nine months ended September 30, 2018, respectively. We recognized foreign currency losses of $0.1 million in the three months ended September 30, 2017 and foreign currency gains of $0.3 million in the nine months ended September 30, 2017, respectively.

25

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (Exchange Act)) as of the end of the period covered by this report. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of the period covered by this quarterly report, our disclosure controls and procedures are effective and provide reasonable assurance that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported accurately and within the time frames specified in the SEC’s rules and forms and accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Exchange Act) during the period covered by this report that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.   

26

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

From time to time, we are subject to various legal proceedings and claims that arise in the ordinary course of our business activities. Although the results of litigation and claims cannot be predicted with certainty, as of the date of these financial statements, we do not believe we are party to any litigation the outcome of which, if determined adversely to us, would individually or in the aggregate be reasonably expected to have a material adverse effect on our business. 

Item 1A. Risk Factors

There have been no material changes from the risk factors we previously disclosed in Part I, Item 1A. “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2017. 

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

On February 9, 2017, we announced that our board of directors had authorized the repurchase of shares of our common stock from time to time on the open market or in privately negotiated purchases, at an aggregate purchase price of up to $50 million. The timing and amount of any share repurchases will be determined by our management based on market conditions and other factors. The term of the program runs through December 31, 2021.

During the three months ended September 30, 2018, we did not repurchase shares of our common stock.

Item 3. Defaults Upon Senior Securities

No matters to disclose.

Item 4. Mine Safety Disclosures

No matters to disclose.

Item 5. Other Information

No matters to disclose.

27

Item 6. Exhibits

The following documents are filed as part of this report:

Exhibit Number		Description of Exhibit
3.1(1)		Third Amended and Restated Articles of Incorporation of Proto Labs, Inc.
3.2(2)		Articles of Amendment to Third Amended and Restated Articles of Incorporation of Proto Labs, Inc. dated May 20, 2015
3.3(3)		Second Amended and Restated By-Laws of Proto Labs, Inc., as amended through November 8, 2016
31.1		Certification of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act
31.2		Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act
32.1		Certification of the Chief Executive Officer and the Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act
101.INS		XBRL Instance Document
101.SCH		XBRL Taxonomy Extension Schema Document
101.CAL		XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF		XBRL Taxonomy Extension Definition Linkbase Document
101.LAB		XBRL Taxonomy Extension Label Linkbase Document
101.PRE		XBRL Taxonomy Extension Presentation Linkbase Document
(1)	Previously filed as Exhibit 3.2 to the Company’s Registration Statement on Form S-1/A (File No. 333-175745), filed with the Commission on February 13, 2012, and incorporated by reference herein.
(2)	Previously filed as Exhibit 3.1 to the Company’s Form 8-K (File No. 001-35435), filed with the Commission on May 21, 2015, and incorporated by reference herein.
(3)	Previously filed as Exhibit 3.2 to the Company’s Form 8-K (File No. 001-35435), filed with the Commission on November 8, 2016, and incorporated by reference herein.

28

SIGNATURE

Pursuant to the requirements 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.

	Proto Labs, Inc.
Date: October 30, 2018	/s/ Victoria M. Holt
	Victoria M. Holt
	President and Chief Executive Officer (Principal Executive Officer)

Date: October 30, 2018	/s/ John A. Way
	John A. Way
	Chief Financial Officer (Principal Financial Officer)

29

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO RULE 13a-14(a) OR 15d-14(a) OF

THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Victoria M. Holt, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Proto Labs, 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.

Date: October 30, 2018	By:	/s/ Victoria M. Holt
		Victoria M. Holt
		President and Chief Executive Officer
		(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO RULE 13a-14(a) OR 15d-14(a) OF

THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002 

I, John A. Way, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Proto Labs, 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.

Date: October 30, 2018	By:	/s/ John A. Way
		John A. Way
		Chief Financial Officer
		(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Victoria M. Holt, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Proto Labs, Inc. on Form 10-Q for the fiscal quarter ended September 30, 2018 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Proto Labs, Inc.

Date: October 30, 2018

By:	/s/ Victoria M. Holt
Name:	Victoria M. Holt
Title:	President and Chief Executive Officer

I, John A. Way, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Proto Labs, Inc. on Form 10-Q for the fiscal quarter ended September 30, 2018 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Proto Labs, Inc.

Date: October 30, 2018

By:	/s/ John A. Way
Name:	John A. Way
Title:	Chief Financial Officer

XML

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 24, 2018
Document Information [Line Items]
Entity Registrant Name	Proto Labs Inc
Entity Central Index Key	0001443669
Trading Symbol	prlb
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding (in shares)		27,070,318
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Amendment Flag	false

XML

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 62,593	$ 36,707
Short-term marketable securities	57,561	57,424
Accounts receivable, net of allowance for doubtful accounts of $949 and $757 as of September 30, 2018 and December 31, 2017, respectively	62,131	51,503
Inventory	9,608	11,271
Prepaid expenses and other current assets	8,639	6,267
Income taxes receivable		1,832
Total current assets	200,532	165,004
Property and equipment, net	210,053	166,440
Goodwill	128,752	128,504
Other intangible assets, net	19,713	19,084
Long-term marketable securities	33,224	37,034
Other long-term assets	3,590	2,672
Total assets	595,864	518,738
Liabilities and shareholders' equity
Accounts payable	17,300	15,876
Accrued compensation	14,462	12,100
Accrued liabilities and other	14,843	8,408
Short-term debt obligations		5,000
Income taxes payable	2,763	2,371
Total current liabilities	49,368	43,755
Long-term income taxes payable	2,181	2,181
Long-term deferred tax liabilities	8,732	6,966
Other long-term liabilities	4,377	4,621
Total liabilities	64,658	57,523
Shareholders' equity
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of each of September 30, 2018 and December 31, 2017
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 27,068,068 and 26,828,651 shares as of September 30, 2018 and December 31, 2017, respectively	27	27
Additional paid-in capital	254,957	241,725
Retained earnings	283,460	224,697
Accumulated other comprehensive loss	(7,238)	(5,234)
Total shareholders' equity	531,206	461,215
Total liabilities and shareholders' equity	$ 595,864	$ 518,738

XML

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Allowance for doubtful accounts	$ 949	$ 757
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	27,068,068	26,828,651
Common stock, shares outstanding (in shares)	27,068,068	26,828,651

XML

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statements of Operations:
Revenue	$ 115,430	$ 88,105	$ 332,827	$ 250,312
Cost of revenue	53,027	38,793	153,303	109,358
Gross profit	62,403	49,312	179,524	140,954
Operating expenses
Marketing and sales	16,818	13,846	50,947	41,463
Research and development	7,458	5,877	21,155	17,784
General and administrative	13,096	10,222	38,679	28,256
Total operating expenses	37,372	29,945	110,781	87,503
Income from operations	25,031	19,367	68,743	53,451
Other income, net	390	291	1,376	1,779
Income before income taxes	25,421	19,658	70,119	55,230
Provision for income taxes	4,484	6,438	12,817	17,724
Net income	$ 20,937	$ 13,220	$ 57,302	$ 37,506
Net income per share:
Basic (in dollars per share)	$ 0.77	$ 0.50	$ 2.13	$ 1.41
Diluted (in dollars per share)	$ 0.77	$ 0.49	$ 2.10	$ 1.40
Shares used to compute net income per share:
Basic (in shares)	27,038,585	26,617,349	26,963,205	26,600,174
Diluted (in shares)	27,337,886	26,802,034	27,268,311	26,716,553
Comprehensive Income (net of tax)
Comprehensive income	$ 20,058	$ 14,875	$ 55,298	$ 42,510

XML

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities
Net income	$ 57,302	$ 37,506
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,520	13,539
Stock-based compensation expense	7,986	6,159
Deferred taxes	1,770	715
Gain on sale of business	(671)
Amortization of held-to-maturity securities	336	851
Other	160	21
Changes in operating assets and liabilities:
Accounts receivable	(8,993)	(10,679)
Inventories	324	(188)
Prepaid expenses and other	(2,058)	(1,147)
Income taxes	2,278	4,158
Accounts payable	980	1,387
Accrued liabilities and other	6,028	6,678
Net cash provided by operating activities	84,962	59,000
Investing activities
Purchases of property, equipment and other capital assets	(61,898)	(24,164)
Cash used for acquisitions, net of cash acquired	(90)
Proceeds from sale of business	284
Purchases of marketable securities	(41,384)	(20,037)
Proceeds from maturities of marketable securities	44,721	34,090
Purchases of other assets and investments	(126)	(514)
Net cash used in investing activities	(58,493)	(10,625)
Financing activities
Payments on debt	(5,000)
Proceeds from exercises of stock options and other	5,248	5,749
Repurchases of common stock		(4,410)
Net cash provided by financing activities	248	1,339
Effect of exchange rate changes on cash and cash equivalents	(831)	774
Net increase in cash and cash equivalents	25,886	50,488
Cash and cash equivalents, beginning of period	36,707	68,795
Cash and cash equivalents, end of period	$ 62,593	$ 119,283

XML

Note 1 - Basis of Presentation

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

Note

1

– Basis of Presentation

The unaudited interim Consolidated Financial Statements of Proto Labs, Inc. (Protolabs, the Company, we, us or our) have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim financial information and with the instructions to Form

10

-Q and Article 

10

of Regulation S-

X.

In the opinion of management, the accompanying financial statements reflect all adjustments necessary for a fair presentation of the Company’s statements of financial position, results of operations and cash flows for the periods presented. Except as otherwise disclosed herein, these adjustments consist of normal, recurring items. Operating results for interim periods are

not

necessarily indicative of results that

may

be expected for the fiscal year as a whole.

The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses, and the related disclosures at the date of the financial statements and during the reporting period. Actual results could materially differ from these estimates. For further information, refer to the audited Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form

10

-K for the year ended

December 

31,

2017

as filed with the Securities and Exchange Commission (SEC) on

February 

23,

2018.

The accompanying Consolidated Balance Sheet as of

December 

31,

2017

was derived from the audited Consolidated Financial Statements but does

not

include all disclosures required by U.S. GAAP for a full set of financial statements. This Form

10

-Q should be read in conjunction with the Company’s Consolidated Financial Statements and Notes included in the Annual Report on Form

10

-K filed on

February 

23,

2018

as referenced above.

XML

Note 2 - Recent Accounting Pronouncements

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Significant Accounting Policies [Text Block]

Note

2

– Recent Accounting Pronouncements

Recently Adopted Accounting Pronouncements

During the

first

quarter of

2018,

the Company adopted the Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU) 

2014

-

09,

Revenue from Contracts with Customers

(ASC

606

). This ASU is a comprehensive new revenue recognition model that requires a company to recognize revenue from the transfer of goods or services to customers in an amount that reflects the consideration that the entity expects to receive in exchange for those goods or services. The Company has adopted the new revenue standard using the modified retrospective approach. The Company manufactures parts that have

no

alternative use to the Company since the parts are custom made to specific customer orders, and the Company believes there is a legally enforceable right to payment for performance completed to date on these manufactured parts. For those manufactured parts that meet these

two

criteria, the Company will recognize revenue over time. The transition adjustment recorded was an increase of

$1.5

million to the Company’s retained earnings balance as of 

January 1, 2018.

During the

first

quarter of

2018,

the Company adopted ASU

2017

-

09,

Compensation – Stock Compensation

, which is intended to provide clarity and reduce diversity in practice as well as cost and complexity when applying the guidance to a change to the terms or conditions of a share-based payment award. The adoption of this guidance did

not

have a material impact on the Company’s consolidated financial statements.

Recently Issued Accounting Pronouncements

In

February 2016,

the FASB issued ASU

2016

-

02,

Leases

, which introduces the balance sheet recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. The guidance will be effective for annual reporting periods beginning after

December 15, 2018

and interim periods within those fiscal years with early adoption permitted. The Company expects to adopt the lease standard using the new transition option, which will allow the Company to continue to apply the legacy guidance in Accounting Standards Codification (ASC)

840,

Leases

, in the comparative periods presented in the year of adoption. The Company is in the process of executing its implementation plan and performing an assessment of its leasing arrangements and service contracts, as well as evaluating the impact of applying the practical expedients and accounting policy elections. The Company is evaluating the impact of the future adoption of this standard on its consolidated financial statements, but because the Company owns a majority of its buildings and significant assets, it does

not

expect the impact to be material. 

In

January 2017,

the FASB issued ASU

2017

-

04,

Intangibles – Goodwill and Other,

which is intended to simplify the subsequent measurement of goodwill. This guidance will be effective for impairment tests in fiscal years beginning after

December 15, 2019

and interim periods within those fiscal years with early adoption permitted. The Company is evaluating the impact of future adoption of this guidance on its consolidated financial statements, but does

not

expect the impact to be material.

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Note 3 - Revenue

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Revenue from Contract with Customer [Text Block]

Note

3

– Revenue

The Company’s significant accounting policies are disclosed in Note

2

to the Consolidated Financial Statements included in its Annual Report on Form

10

-K for the year ended

December 31, 2017.

Significant changes to the Company’s accounting policies as a result of adopting ASC

606

are discussed below:

Revenue Recognition

The Company provides quality, quick-turn prototyping and on-demand manufacturing services. As a result, the majority of revenue recognized in a reporting period is based on completed, invoiced contracts. The Company accounts for revenue in accordance with ASC

606,

which the Company adopted on

January 1, 2018,

using the modified retrospective method. Results for reporting periods beginning after

January 1, 2018

are presented under ASC

606,

while prior period amounts are

not

adjusted and continue to be reported in accordance with the Company’s historic accounting under ASC

605.

The Company recorded a net increase of

$1.5

million to its retained earnings balance on

January 1, 2018

due to the cumulative impact of adopting ASC

606.

The impact of adopting ASC

606

was to increase revenue by 

$1.3

million and increase cost of revenue by 

$0.6

million for the

three

months ended

September 30, 2018,

and to increase accounts receivable by

$1.3

million and decrease inventory by

$0.6

million as of 

September 30, 2018.

For the

nine

months ended

September 30, 2018

the impact of adopting ASC

606

was to increase revenue by

$1.5

million and increase cost of revenue by 

$0.7

million, as well as increase accounts receivable by 

$4.0

million and decrease inventory by 

$1.8

million as of 

September 30, 2018,

which includes the transition adjustment of

$1.5

million noted above.

A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account in ASC

606.

The majority of the Company’s CNC machining,

3D

printing, and sheet metal contracts have a single performance obligation. The majority of the Company’s injection molding contracts have multiple performance obligations including

one

obligation to produce the mold and a

second

obligation to produce parts. For injection molding contracts with multiple performance obligations, we allocate revenue to each performance obligation based on its relative standalone selling price. We generally determine standalone selling price based on the price charged to customers.

The Company manufactures parts that have

no

alternative use to the Company since the parts are custom made to specific customer orders, and the Company believes there is a legally enforceable right to payment for performance completed to date on these manufactured parts. For manufactured parts that meet these

two

criteria, the Company will recognize revenue over time. Revenue is recognized over time using the input method based on time in production to measure progress toward satisfying performance obligations.

Revenue by geographic region for the

three

and

nine

months ended

September 30, 2018

and

2017

was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017		2018		2017
Revenue:
United States	$	90,732	$	67,490	$	261,253	$	191,019
Europe		21,273		18,094		61,431		51,224
Japan		3,425		2,521		10,143		8,069
Total revenue	$	115,430	$	88,105	$	332,827	$	250,312

Revenue by product line for the

three

and

nine

months ended

September 30, 2018

and

2017

 was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017		2018		2017
Revenue:
Injection Molding	$	53,681	$	49,480	$	156,610	$	144,187
CNC Machining		40,845		27,166		115,364		73,318
3D Printing		13,845		11,102		39,418		32,061
Sheet Metal		6,452		-		19,002		-
Other Revenue		607		357		2,433		746
Total revenue	$	115,430	$	88,105	$	332,827	$	250,312

The Company generally expenses sales commissions when incurred because the amortization period would have been

one

year or less. These costs are recorded within marketing and sales expenses. The value of unsatisfied performance obligations for contracts with an original expected length of

one

year or less is

not

material.

XML

Note 4 - Net Income Per Common Share

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Earnings Per Share [Text Block]

Note

4

– Net Income per Common Share

Basic net income per share is computed based on the weighted-average number of common shares outstanding. Diluted net income per share is computed based on the weighted-average number of common shares outstanding, increased by the number of additional shares that would have been outstanding had potentially dilutive common shares been issued and reduced by the number of shares the Company could have repurchased from the proceeds from issuance of the potentially dilutive shares. Potentially dilutive shares of common stock include stock options, restricted stock units and restricted stock awards granted under stock-based compensation plans and shares committed to be purchased under the employee stock purchase plan. Performance stock units are excluded from the calculation of dilutive potential common shares until the performance conditions have been satisfied.

The table below sets forth the computation of basic and diluted net income per share:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands, except share and per share amounts)	2018		2017		2018		2017
Net income	$	20,937	$	13,220	$	57,302	$	37,506
Basic - weighted-average shares outstanding:		27,038,585		26,617,349		26,963,205		26,600,174
Effect of dilutive securities:
Employee stock options and other		299,301		184,685		305,106		116,379
Diluted - weighted-average shares outstanding:		27,337,886		26,802,034		27,268,311		26,716,553
Net income per share:
Basic	$	0.77	$	0.50	$	2.13	$	1.41
Diluted	$	0.77	$	0.49	$	2.10	$	1.40

XML

Note 5 - Goodwill and Other Intangible Assets

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Goodwill and Intangible Assets Disclosure [Text Block]

 

Note

5

– Goodwill and Other Intangible Assets

There were

no

changes in the carrying amount of Goodwill during the

three

months ended

September 30, 2018.

The changes in the carrying amount of goodwill during the

nine

months ended

September 30, 2018

were as follows: 

(in thousands)	Nine Months Ended September 30, 2018
Balance as of the beginning of the period	$	128,504
Goodwill acquired during the period		248
Balance as of the end of the period	$	128,752

The Company adjusted goodwill by 

$0.2

million during the

nine

months ended

September 30, 2018

as a result of the final working capital adjustment for the acquisition of RAPID in

November 2017.

Intangible Assets other than goodwill at

September 30, 2018

and

December 31, 2017

were as follows:

	September 30, 2018							December 31, 2017							Useful	Weighted Average
(in thousands)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net		Life (in years)	Useful Life Remaining (in years)
Intangible Assets with finite lives:
Marketing assets	$	930	$	(411	)	$	519	$	930	$	(341	)	$	589	10.0	5.5
Non-compete agreement		270		(202	)		68		270		(190	)		80	2.0 - 5.0	4.3
Trade secrets		250		(221	)		29		250		(183	)		67	5.0	0.5
Trade names		1,080		(405	)		675		1,080		-			1,080	2.0	1.3
Software technology		11,229		(694	)		10,535		8,229		-			8,229	10.0	9.3
Customer relationships		10,070		(2,183	)		7,887		10,070		(1,031	)		9,039	6.0 - 9.0	5.1
Total intangible assets	$	23,829	$	(4,116	)	$	19,713	$	20,829	$	(1,745	)	$	19,084

Amortization expense for intangible assets was

$0.8

million and

$0.1

million for the

three

months ended

September 30, 2018

and

2017,

respectively, and

$2.4

million and

$0.4

million for the

nine

months ended

September 30, 2018

and

2017,

respectively.

Estimated aggregated amortization expense based on the current carrying value of the amortizable intangible assets is as follows:

(in thousands)	Estimated Amortization Expense
Remaining 2018	$	843
2019		3,342
2020		2,786
2021		2,786
2022		2,786
Thereafter		7,170
Total estimated amortization expense	$	19,713

XML

Note 6 - Fair Value Measurements

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Fair Value Disclosures [Text Block]

Note

6

– Fair Value Measurements

ASC

820,

Fair Value Measuremen

t (ASC

820

), defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC

820

also establishes a fair value hierarchy that requires classification based on observable and unobservable inputs when measuring fair value. There are

three

levels of inputs that

may

be used to measure fair value:

Level

1—Quoted

prices in active markets for identical assets or liabilities.

Level

2—Observable

inputs other than Level

1

prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are

not

active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level

3—Unobservable

inputs that are supported by little or

no

market activity and that are significant to the fair value of the assets or liabilities.

The Company’s cash consists of bank deposits. The Company’s cash equivalents measured at fair value consist of money market mutual funds. The Company determines the fair value of these investments using Level

1

inputs.

The following table summarizes financial assets as of

September 30, 2018

and

December 31, 2017

measured at fair value on a recurring basis: 

	September 30, 2018						December 31, 2017
(in thousands)	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Financial Assets:
Cash and cash equivalents
Money market mutual fund	$	193	$	-	$	-	$	3,034	$	-	$	-
Total	$	193	$	-	$	-	$	3,034	$	-	$	-

XML

Note 7 - Marketable Securities

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Investment [Text Block]

Note

7

– Marketable Securities

The Company invests in short-term and long-term agency, municipal, corporate, commercial paper and other debt securities. The securities are categorized as held-to-maturity and are recorded at amortized cost. Categorization as held-to-maturity is based on the Company’s ability and intent to hold these securities to maturity. The following table summarizes information regarding the Company’s short-term and long-term marketable securities as of

September 30, 2018

and

December 31, 2017:

	September 30, 2018
(in thousands)	Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. municipal securities	$	20,607	$	-	$	(74	)	$	20,533
Corporate debt securities		43,525		-		(153	)		43,372
U.S. government agency securities		22,197		-		(156	)		22,041
Certificates of deposit/time deposits		4,456		-		(29	)		4,427
Total marketable securities	$	90,785	$	-	$	(412	)	$	90,373

	December 31, 2017
(in thousands)	Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. municipal securities	$	28,364	$	-	$	(104	)	$	28,260
Corporate debt securities		29,806		-		(128	)		29,678
U.S. government agency securities		32,320		-		(199	)		32,121
Certificates of deposit/time deposits		3,968		-		(32	)		3,936
Total marketable securities	$	94,458	$	-	$	(463	)	$	93,995

Fair values for the corporate debt securities are primarily determined based on quoted market prices (Level

1

). Fair values for the U.S. municipal securities, U.S. government agency securities, commercial paper and certificates of deposit are primarily determined using dealer quotes or quoted market prices for similar securities (Level

2

).

The Company tests for other-than-temporary losses on a quarterly basis and has considered the unrealized losses indicated above to be temporary in nature. In reaching this conclusion, the Company considered the credit quality of the issuers of the debt securities as well as the Company’s intent to hold the investments to maturity and recover the full principal.

Classification of marketable securities as current or non-current is based upon the security’s maturity date as of the date of these financial statements.

The

September 30, 2018

balance of held-to-maturity debt securities by contractual maturity is shown in the following table at amortized cost. Actual maturities

may

differ from contractual maturities because the issuers of the securities

may

have the right to prepay obligations without prepayment penalties.

	September 30,
(in thousands)	2018
Due in one year or less	$	57,561
Due after one year through five years		33,224
Total marketable securities	$	90,785

XML

Note 8 - Inventory

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Inventory Disclosure [Text Block]

Note

8

– Inventory

Inventory consists primarily of raw materials, which are recorded at the lower of cost or market using the average-cost method, which approximates

first

-in,

first

-out (FIFO) cost. The Company periodically reviews its inventory for slow-moving, damaged and discontinued items and provides allowances to reduce such items identified to their recoverable amounts.

The Company’s inventory consisted of the following as of the dates indicated:

	September 30,			December 31,
(in thousands)	2018			2017
Raw materials	$	9,424		$	9,767
Work in process		532			1,998
Total inventory		9,956			11,765
Allowance for obsolescence		(348	)		(494	)
Inventory, net of allowance	$	9,608		$	11,271

XML

Note 9 - Stock-based Compensation

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

Note

9

– Stock-Based Compensation

Under the Company’s

2012

Long-Term Incentive Plan, as amended (the

2012

Plan), the Company has the ability to grant stock options, stock appreciation rights (SARs), restricted stock, restricted stock units, other stock-based awards and cash incentive awards. Awards under the

2012

Plan have a maximum term of

ten

years from the date of grant. The compensation committee

may

provide that the vesting or payment of any award will be subject to the attainment of specified performance measures in addition to the satisfaction of any continued service requirements and the compensation committee will determine whether such measures have been achieved. The per-share exercise price of stock options and SARs granted under the

2012

Plan generally

may

not

be less than the fair market value of a share of our common stock on the date of the grant.

Employee Stock Purchase Plan

The Company’s

2012

Employee Stock Purchase Plan (ESPP) allows eligible employees to purchase a variable number of shares of the Company’s common stock each offering period at a discount through payroll deductions of up to

15

percent of their eligible compensation, subject to plan limitations. The ESPP provides for

six

-month offering periods with a single purchase period ending

May 

15

and

November 

15,

respectively. At the end of each offering period, employees are able to purchase shares at

85

percent of the lower of the fair market value of the Company’s common stock on the

first

trading day of the offering period or on the last trading day of the offering period.

Stock-Based Compensation Expense

Stock-based compensation expense was

$3.0

million and

$2.2

million for the

three

months ended

September 30, 2018

and

2017,

respectively, and

$8.0

million and

$6.2

million for the

nine

months ended

September 30, 2018

and

2017,

respectively.

Stock Options

The following table summarizes stock option activity during the

nine

months ended

September 30, 2018:

				Weighted-
				Average
	Stock Options			Exercise Price
Options outstanding at December 31, 2017		399,397		$	51.14
Granted		36,258			110.59
Exercised		(152,110	)		39.31
Forfeited		(22,742	)		70.00
Options outstanding at September 30, 2018		260,803		$	64.66
Exercisable at September 30, 2018		126,008		$	51.25

The outstanding options generally have a term of

ten

years. For employees, options granted become exercisable ratably over the vesting period, which is generally a period from

four

to

five

years, beginning on the

first

anniversary of the grant date, subject to the employee’s continuing service to the Company. For directors, options generally become exercisable in full on the

first

anniversary of the grant date.

The weighted-average grant date fair value of options that were granted during the

nine

months ended

September 30, 2018

was

$50.08.

The following table provides the assumptions used in the Black-Scholes pricing model valuation of options during the

nine

months ended

September 30, 2018

and

2017:

	Nine Months Ended September 30,
	2018	2017
Risk-free interest rate	2.52 - 3.07%	2.24%
Expected life (years)	6.25	6.50
Expected volatility	41.68 - 42.22%	44.68%
Expected dividend yield	0%	0%

As of

September 30, 2018,

there was

$3.9

 million of unrecognized compensation expense related to unvested stock options, which is expected to be recognized over a weighted-average period of

3.1

 years.

Restricted Stock

Restricted stock awards are share-settled awards and restrictions lapse ratably over the vesting period, which is generally a period from

four

to

five

years, beginning on the

first

anniversary of the grant date, subject to the employee's continuing service to the Company. For directors, restrictions generally lapse in full on the

first

anniversary of the grant date. 

The following table summarizes restricted stock activity during the

nine

months ended

September 30, 2018:

				Weighted-
				Average
				Grant Date
	Restricted			Fair Value
	Stock			Per Share
Restricted stock at December 31, 2017		334,608		$	63.29
Granted		106,760			115.41
Restrictions lapsed		(83,456	)		62.85
Forfeited		(25,661	)		65.73
Restricted stock at September 30, 2018		332,251		$	79.96

As of

September 30, 2018,

there was

$23.1

million of unrecognized compensation expense related to non-vested restricted stock, which is expected to be recognized over a weighted-average period of

3.3

 years. 

Performance Stock

Performance stock units (PSUs) are expressed in terms of a target number of PSUs, with anywhere between

0

percent and

150

percent of that target number capable of being earned and vesting at the end of a

three

-year performance period depending on the Company’s performance in the final year of the performance period and the award recipient’s continued employment.

The following table summarizes performance stock activity during the

nine

months ended

September 30, 2018: 

			Weighted-
			Average
			Grant Date
	Performance		Fair Value
	Stock		Per Share
Performance stock at December 31, 2017		25,707	$	58.35
Granted		20,006		105.75
Restrictions lapsed		-		-
Performance change		6,427		58.35
Forfeited		-		-
Performance stock at September 30, 2018		52,140	$	76.54

As of

September 30, 2018,

there was

$2.5

million of unrecognized compensation expense related to non-vested performance stock, which is expected to be recognized over a weighted-average period of

2.0

years. 

Employee Stock Purchase Plan

The following table presents the assumptions used to estimate the fair value of the ESPP during the

nine

months ended

September 30, 2018

and

2017:

	Nine Months Ended September 30,
	2018	2017
Risk-free interest rate	1.48 - 2.06%	0.59 - 0.97%
Expected life (months)	6.00	6.00
Expected volatility	24.49 - 31.50%	34.51 - 39.51%
Expected dividend yield	0%	0%

XML

Note 10 - Accumulated Other Comprehensive Loss

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Disclosure of Reclassification Amount [Text Block]

Note

10

– Accumulated Other Comprehensive Loss

Other comprehensive income (loss) is comprised entirely of foreign currency translation adjustments. The following table presents the changes in accumulated other comprehensive income (loss) balances during the

three

and

nine

months ended

September 30, 2018

and

2017:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(in thousands)	2018			2017			2018			2017
Foreign currency translation adjustments
Balance at beginning of period	$	(6,359	)	$	(7,404	)	$	(5,234	)	$	(10,753	)
Other comprehensive income (loss) before reclassifications		(879	)		1,655			(2,004	)		5,004
Amounts reclassified from accumulated other comprehensive loss		-			-			-			-
Net current-period other comprehensive income (loss)		(879	)		1,655			(2,004	)		5,004
Balance at end of period	$	(7,238	)	$	(5,749	)	$	(7,238	)	$	(5,749	)

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Note 11 - Income Taxes

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Income Tax Disclosure [Text Block]

Note

11

– Income Taxes

The Company is subject to income tax in multiple jurisdictions and the use of estimates is required to determine the provision for income taxes. For the

three

months ended

September 30, 2018

and

2017,

the Company recorded an income tax provision of

$4.5

 million and

$6.4

million, respectively. For the

nine

months ended

September 30, 2018

and

2017,

the Company recorded an income tax provision of

$12.8

 million and

$17.7

million, respectively. The income tax provision is based on the estimated annual effective tax rate for the year applied to pre-tax income. The effective income tax rate for the

three

months ended

September 30, 2018

was

17.6

 percent compared to

32.8

percent in the same period of the prior year. The effective tax rate decreased by

15.2

 percent for the

three

months ended

September 30, 2018

when compared to the same period in

2017

primarily due to the impact of tax reform and benefits from the vesting of restricted stock and the exercise of stock options. The effective income tax rate for the

nine

months ended

September 30, 2018

was

18.3

 percent compared to

32.1

percent in the same period of the prior year. The effective tax rate decreased by

13.8

 percent for the

nine

months ended

September 30, 2018

when compared to the same period in

2017

primarily due to the impact of tax reform and benefits from the vesting of restricted stock and the exercise of stock options.

The Tax Cuts and Jobs Act (the Act) was enacted on

December 22, 2017.

The Act reduces the U.S. federal corporate tax rate from

35

percent to

21

percent, requires companies to pay a transition tax on earnings of certain foreign subsidiaries that were previously tax-deferred and creates new taxes on certain foreign-sourced earnings. The Company has applied the guidance in ASU

2018

-

05,

Income Taxes (Topic

740

): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin

No.

118,

when accounting for the enactment-date effects of the Act. As of

September 30, 2018,

the Company had

not

completed its accounting for the tax effects of the Act, as the Company is in the process of analyzing certain aspects of the Act, obtaining information, and refining its calculations of the Act's impact. There have been

no

material measurement period adjustments made during the 

three

and

nine

months ended

September 30, 2018

related to the provisional amounts recorded and disclosed in our Annual Report on Form

10

-K for the year ended

December 31, 2017. 

The Company expects to complete the accounting for the tax effects of the Act during

2018.

The effective income tax rate for the

three

and

nine

months ended

September 30, 2018

differs from the U.S. federal statutory rate of

21.0

percent due primarily to the mix of income earned in domestic and foreign tax jurisdictions and deductions for which the Company qualifies.

The Company had reserves against unrecognized tax benefits totaling

$3.9

million at

September 30, 2018

and

$4.2

million at

December 31, 2017,

all of which, if recognized, would affect the Company’s effective tax rate. The Company recognizes interest and penalties related to income tax matters in income tax expense, and reports the liability in current or long-term income taxes payable as appropriate.

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Note 12 - Segment Reporting

9 Months Ended

Sep. 30, 2018

Notes to Financial Statements

Segment Reporting Disclosure [Text Block]

Note

12

– Segment Reporting

The Company’s reportable segments are based on the internal reporting used by the Company’s Chief Executive Officer, who is the chief operating decision maker (CODM), to assess operating performance and make decisions about the allocation of resources. The Corporate Unallocated and Japan category includes non-reportable segments, as well as research and development and general and administrative costs that the Company does

not

allocate directly to its operating segments.

Intercompany transactions primarily relate to intercontinental activity and have been eliminated and are excluded from the reported amounts. The difference between income from operations and pre-tax income relates to foreign currency-related gains and losses and interest income on cash balances and investments, which are

not

allocated to business segments. 

Revenue and income from operations by reportable segment for the

three

and

nine

months ended

September 30, 2018

and

2017

were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017		2018		2017
Revenue:
United States	$	90,732	$	67,490	$	261,253	$	191,019
Europe		21,273		18,094		61,431		51,224
Japan		3,425		2,521		10,143		8,069
Total revenue	$	115,430	$	88,105	$	332,827	$	250,312

	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2018			2017			2018			2017
Income from Operations:
United States	$	31,726		$	26,903		$	92,258		$	76,973
Europe		5,478			3,251			12,879			9,626
Corporate Unallocated and Japan		(12,173	)		(10,787	)		(36,394	)		(33,148	)
Total Income from Operations	$	25,031		$	19,367		$	68,743		$	53,451

Total long-lived assets at

September 30, 2018

and

December 31, 2017 

were as follows:

	September 30,		December 31,
(in thousands)	2018		2017
Total long-lived assets:
United States	$	168,903	$	125,308
Europe		33,783		33,691
Japan		7,367		7,441
Total Assets	$	210,053	$	166,440

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Note 3 - Revenue (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017		2018		2017
Revenue:
United States	$	90,732	$	67,490	$	261,253	$	191,019
Europe		21,273		18,094		61,431		51,224
Japan		3,425		2,521		10,143		8,069
Total revenue	$	115,430	$	88,105	$	332,827	$	250,312

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017		2018		2017
Revenue:
Injection Molding	$	53,681	$	49,480	$	156,610	$	144,187
CNC Machining		40,845		27,166		115,364		73,318
3D Printing		13,845		11,102		39,418		32,061
Sheet Metal		6,452		-		19,002		-
Other Revenue		607		357		2,433		746
Total revenue	$	115,430	$	88,105	$	332,827	$	250,312

XML

Note 4 - Net Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands, except share and per share amounts)	2018		2017		2018		2017
Net income	$	20,937	$	13,220	$	57,302	$	37,506
Basic - weighted-average shares outstanding:		27,038,585		26,617,349		26,963,205		26,600,174
Effect of dilutive securities:
Employee stock options and other		299,301		184,685		305,106		116,379
Diluted - weighted-average shares outstanding:		27,337,886		26,802,034		27,268,311		26,716,553
Net income per share:
Basic	$	0.77	$	0.50	$	2.13	$	1.41
Diluted	$	0.77	$	0.49	$	2.10	$	1.40

XML

Note 5 - Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Schedule of Goodwill [Table Text Block]

(in thousands)	Nine Months Ended September 30, 2018
Balance as of the beginning of the period	$	128,504
Goodwill acquired during the period		248
Balance as of the end of the period	$	128,752

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	September 30, 2018							December 31, 2017							Useful	Weighted Average
(in thousands)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net		Life (in years)	Useful Life Remaining (in years)
Intangible Assets with finite lives:
Marketing assets	$	930	$	(411	)	$	519	$	930	$	(341	)	$	589	10.0	5.5
Non-compete agreement		270		(202	)		68		270		(190	)		80	2.0 - 5.0	4.3
Trade secrets		250		(221	)		29		250		(183	)		67	5.0	0.5
Trade names		1,080		(405	)		675		1,080		-			1,080	2.0	1.3
Software technology		11,229		(694	)		10,535		8,229		-			8,229	10.0	9.3
Customer relationships		10,070		(2,183	)		7,887		10,070		(1,031	)		9,039	6.0 - 9.0	5.1
Total intangible assets	$	23,829	$	(4,116	)	$	19,713	$	20,829	$	(1,745	)	$	19,084

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

(in thousands)	Estimated Amortization Expense
Remaining 2018	$	843
2019		3,342
2020		2,786
2021		2,786
2022		2,786
Thereafter		7,170
Total estimated amortization expense	$	19,713

XML

Note 6 - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	September 30, 2018						December 31, 2017
(in thousands)	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Financial Assets:
Cash and cash equivalents
Money market mutual fund	$	193	$	-	$	-	$	3,034	$	-	$	-
Total	$	193	$	-	$	-	$	3,034	$	-	$	-

XML

Note 7 - Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Debt Securities, Held-to-maturity [Table Text Block]

	September 30, 2018
(in thousands)	Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. municipal securities	$	20,607	$	-	$	(74	)	$	20,533
Corporate debt securities		43,525		-		(153	)		43,372
U.S. government agency securities		22,197		-		(156	)		22,041
Certificates of deposit/time deposits		4,456		-		(29	)		4,427
Total marketable securities	$	90,785	$	-	$	(412	)	$	90,373

	December 31, 2017
(in thousands)	Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. municipal securities	$	28,364	$	-	$	(104	)	$	28,260
Corporate debt securities		29,806		-		(128	)		29,678
U.S. government agency securities		32,320		-		(199	)		32,121
Certificates of deposit/time deposits		3,968		-		(32	)		3,936
Total marketable securities	$	94,458	$	-	$	(463	)	$	93,995

Investments Classified by Contractual Maturity Date [Table Text Block]

	September 30,
(in thousands)	2018
Due in one year or less	$	57,561
Due after one year through five years		33,224
Total marketable securities	$	90,785

XML

Note 8 - Inventory (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	September 30,			December 31,
(in thousands)	2018			2017
Raw materials	$	9,424		$	9,767
Work in process		532			1,998
Total inventory		9,956			11,765
Allowance for obsolescence		(348	)		(494	)
Inventory, net of allowance	$	9,608		$	11,271

XML

Note 9 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Share-based Compensation, Stock Options, Activity [Table Text Block]

				Weighted-
				Average
	Stock Options			Exercise Price
Options outstanding at December 31, 2017		399,397		$	51.14
Granted		36,258			110.59
Exercised		(152,110	)		39.31
Forfeited		(22,742	)		70.00
Options outstanding at September 30, 2018		260,803		$	64.66
Exercisable at September 30, 2018		126,008		$	51.25

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Nine Months Ended September 30,
	2018	2017
Risk-free interest rate	2.52 - 3.07%	2.24%
Expected life (years)	6.25	6.50
Expected volatility	41.68 - 42.22%	44.68%
Expected dividend yield	0%	0%

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

				Weighted-
				Average
				Grant Date
	Restricted			Fair Value
	Stock			Per Share
Restricted stock at December 31, 2017		334,608		$	63.29
Granted		106,760			115.41
Restrictions lapsed		(83,456	)		62.85
Forfeited		(25,661	)		65.73
Restricted stock at September 30, 2018		332,251		$	79.96

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

			Weighted-
			Average
			Grant Date
	Performance		Fair Value
	Stock		Per Share
Performance stock at December 31, 2017		25,707	$	58.35
Granted		20,006		105.75
Restrictions lapsed		-		-
Performance change		6,427		58.35
Forfeited		-		-
Performance stock at September 30, 2018		52,140	$	76.54

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

	Nine Months Ended September 30,
	2018	2017
Risk-free interest rate	1.48 - 2.06%	0.59 - 0.97%
Expected life (months)	6.00	6.00
Expected volatility	24.49 - 31.50%	34.51 - 39.51%
Expected dividend yield	0%	0%

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Note 10 - Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Comprehensive Income (Loss) [Table Text Block]

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(in thousands)	2018			2017			2018			2017
Foreign currency translation adjustments
Balance at beginning of period	$	(6,359	)	$	(7,404	)	$	(5,234	)	$	(10,753	)
Other comprehensive income (loss) before reclassifications		(879	)		1,655			(2,004	)		5,004
Amounts reclassified from accumulated other comprehensive loss		-			-			-			-
Net current-period other comprehensive income (loss)		(879	)		1,655			(2,004	)		5,004
Balance at end of period	$	(7,238	)	$	(5,749	)	$	(7,238	)	$	(5,749	)

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Note 12 - Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Income from Operations by Geographic Area [Table Text Block]

	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2018			2017			2018			2017
Income from Operations:
United States	$	31,726		$	26,903		$	92,258		$	76,973
Europe		5,478			3,251			12,879			9,626
Corporate Unallocated and Japan		(12,173	)		(10,787	)		(36,394	)		(33,148	)
Total Income from Operations	$	25,031		$	19,367		$	68,743		$	53,451

Long-lived Assets by Geographic Areas [Table Text Block]

	September 30,		December 31,
(in thousands)	2018		2017
Total long-lived assets:
United States	$	168,903	$	125,308
Europe		33,783		33,691
Japan		7,367		7,441
Total Assets	$	210,053	$	166,440

Operating Segments [Member]

Notes Tables

Revenue from External Customers by Geographic Areas [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017		2018		2017
Revenue:
United States	$	90,732	$	67,490	$	261,253	$	191,019
Europe		21,273		18,094		61,431		51,224
Japan		3,425		2,521		10,143		8,069
Total revenue	$	115,430	$	88,105	$	332,827	$	250,312

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Note 2 - Recent Accounting Pronouncements (Details Textual) $ in Millions	Jan. 01, 2018 USD ($)
Retained Earnings [Member] | Accounting Standards Update 2014-09 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 1.5

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Note 3 - Revenue (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jan. 01, 2018
Revenue from Contract with Customer, Including Assessed Tax	$ 115,430	$ 88,105	$ 332,827	$ 250,312
Cost of Goods and Services Sold, Total	53,027	$ 38,793	153,303	109,358
Increase (Decrease) in Accounts Receivable			8,993	10,679
Increase (Decrease) in Inventories, Total			(324)	$ 188
Accounting Standards Update 2014-09 [Member]
Revenue from Contract with Customer, Including Assessed Tax	1,300		1,500
Cost of Goods and Services Sold, Total	600		700
Increase (Decrease) in Accounts Receivable	1,300		4,000
Increase (Decrease) in Inventories, Total	$ (600)		$ 1,800
Retained Earnings [Member] | Accounting Standards Update 2014-09 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption					$ 1,500

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Note 3 - Revenue - Summary of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue	$ 115,430	$ 88,105	$ 332,827	$ 250,312
Injection Molding (Protomold) [Member]
Revenue	53,681	49,480	156,610	144,187
CNC Machining (Firstcut) [Member]
Revenue	40,845	27,166	115,364	73,318
3D Printing (Fineline) [Member]
Revenue	13,845	11,102	39,418	32,061
Sheet Metal [Member]
Revenue	6,452		19,002
Other Products [Member]
Revenue	607	357	2,433	746
UNITED STATES
Revenue	90,732	67,490	261,253	191,019
Europe [Member]
Revenue	21,273	18,094	61,431	51,224
JAPAN
Revenue	$ 3,425	$ 2,521	$ 10,143	$ 8,069

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Note 4 - Net Income Per Common Share - Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income	$ 20,937	$ 13,220	$ 57,302	$ 37,506
Basic - weighted-average shares outstanding: (in shares)	27,038,585	26,617,349	26,963,205	26,600,174
Employee stock options and other (in shares)	299,301	184,685	305,106	116,379
Diluted - weighted-average shares outstanding: (in shares)	27,337,886	26,802,034	27,268,311	26,716,553
Basic (in dollars per share)	$ 0.77	$ 0.50	$ 2.13	$ 1.41
Diluted (in dollars per share)	$ 0.77	$ 0.49	$ 2.10	$ 1.40

XML

Note 5 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill, Acquired During Period			$ 248
Amortization of Intangible Assets, Total	$ 800	$ 100	2,400	$ 400
Rapid [Member]
Goodwill, Acquired During Period			$ 200

XML

Note 5 - Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Balance as of the beginning of the period	$ 128,504
Goodwill acquired during the period	248
Balance as of the end of the period	$ 128,752

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Note 5 - Goodwill and Other Intangible Assets - Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Gross	$ 23,829	$ 20,829
Accumulated amortization	(4,116)	(1,745)
Net	19,713	19,084
Marketing-Related Intangible Assets [Member]
Gross	930	930
Accumulated amortization	(411)	(341)
Net	$ 519	589
Useful life (Year)	10 years
Weighted average useful life remaining (Year)	5 years 182 days
Noncompete Agreements [Member]
Gross	$ 270	270
Accumulated amortization	(202)	(190)
Net	$ 68	80
Weighted average useful life remaining (Year)	4 years 109 days
Noncompete Agreements [Member] | Minimum [Member]
Useful life (Year)	2 years
Noncompete Agreements [Member] | Maximum [Member]
Useful life (Year)	5 years
Trade Secrets [Member]
Gross	$ 250	250
Accumulated amortization	(221)	(183)
Net	$ 29	67
Useful life (Year)	5 years
Weighted average useful life remaining (Year)	182 days
Trade Names [Member]
Gross	$ 1,080	1,080
Accumulated amortization	(405)
Net	$ 675	1,080
Useful life (Year)	2 years
Weighted average useful life remaining (Year)	1 year 109 days
Computer Software, Intangible Asset [Member]
Gross	$ 11,229	8,229
Accumulated amortization	(694)
Net	$ 10,535	8,229
Useful life (Year)	10 years
Weighted average useful life remaining (Year)	9 years 109 days
Customer Relationships [Member]
Gross	$ 10,070	10,070
Accumulated amortization	(2,183)	(1,031)
Net	$ 7,887	$ 9,039
Weighted average useful life remaining (Year)	5 years 36 days
Customer Relationships [Member] | Minimum [Member]
Useful life (Year)	6 years
Customer Relationships [Member] | Maximum [Member]
Useful life (Year)	9 years

XML

Note 5 - Goodwill and Other Intangible Assets - Estimated Aggregated Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Remaining 2018	$ 843
2019	3,342
2020	2,786
2021	2,786
2022	2,786
Thereafter	7,170
Total estimated amortization expense	$ 19,713	$ 19,084

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Note 6 - Fair Value Measurements - Fair Value of Financial Assets Measured on a Recurring Basis (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Inputs, Level 1 [Member]
Money market mutual fund	$ 193	$ 3,034
Total	193	3,034
Fair Value, Inputs, Level 2 [Member]
Money market mutual fund
Total
Fair Value, Inputs, Level 3 [Member]
Money market mutual fund
Total

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Note 7 - Marketable Securities - Short-term and Long-term Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Amortized Cost	$ 90,785	$ 94,458
Unrealized Gains
Unrealized Losses	(412)	(463)
Fair Value	90,373	93,995
Bank Time Deposits [Member]
Amortized Cost	4,456	3,968
Unrealized Gains
Unrealized Losses	(29)	(32)
Fair Value	4,427	3,936
US States and Political Subdivisions Debt Securities [Member]
Amortized Cost	20,607	28,364
Unrealized Gains
Unrealized Losses	(74)	(104)
Fair Value	20,533	28,260
Corporate Debt Securities [Member]
Amortized Cost	43,525	29,806
Unrealized Gains
Unrealized Losses	(153)	(128)
Fair Value	43,372	29,678
US Government Agencies Debt Securities [Member]
Amortized Cost	22,197	32,320
Unrealized Gains
Unrealized Losses	(156)	(199)
Fair Value	$ 22,041	$ 32,121

XML

Note 7 - Marketable Securities - Balance of Held-to-maturity Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Due in one year or less	$ 57,561
Due after one year through five years	33,224
Total marketable securities	$ 90,785	$ 94,458

XML

Note 8 - Inventory - Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Raw materials	$ 9,424	$ 9,767
Work in process	532	1,998
Total inventory	9,956	11,765
Allowance for obsolescence	(348)	(494)
Inventory, net of allowance	$ 9,608	$ 11,271

XML

Note 9 - Stock-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			10 years
Share-based Compensation, Total	$ 3,000	$ 2,200	$ 7,986	$ 6,159
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 50.08
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	3,900		$ 3,900
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date			15.00%
Employee Stock Purchase Plan, Offering Period			180 days
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent			85.00%
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			10 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			3 years 36 days
Employee Stock Option [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			4 years
Employee Stock Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			5 years
Restricted Stock [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	23,100		$ 23,100
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			3 years 109 days
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			4 years
Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			5 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 2,500		$ 2,500
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			2 years
Percentage of Target Number Capable of Being Earned and Vesting, Lower Limit	0.00%		0.00%
Percentage of Target Number Capable of Being Earned and Vesting, Upper Limit	150.00%		150.00%

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Note 9 - Stock-based Compensation - Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2018 $ / shares shares
Options outstanding (in shares) | shares	399,397
Options outstanding, weighted- average exercise price (in dollars per share) | $ / shares	$ 51.14
Granted (in shares) | shares	36,258
Granted, weighted- average exercise price (in dollars per share) | $ / shares	$ 110.59
Exercised (in shares) | shares	(152,110)
Exercised, weighted- average exercise price (in dollars per share) | $ / shares	$ 39.31
Forfeited (in shares) | shares	(22,742)
Forfeited, weighted- average exercise price (in dollars per share) | $ / shares	$ 70
Options outstanding (in shares) | shares	260,803
Options outstanding, weighted- average exercise price (in dollars per share) | $ / shares	$ 64.66
Options exercisable (in shares) | shares	126,008
Options exercisable, weighted- average exercise price (in dollars per share) | $ / shares	$ 51.25

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Note 9 - Stock-based Compensation - Assumptions Used in the Black-Scholes Option Pricing Model (Details) - Employee Stock Option [Member]	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Risk-free interest rate		2.24%
Expected life (Year)	6 years 91 days	6 years 182 days
Expected volatility		44.68%
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	2.52%
Expected volatility	41.68%
Maximum [Member]
Risk-free interest rate	3.07%
Expected volatility	42.22%

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Note 9 - Stock-based Compensation - Non-vested Restricted Stock Options (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2018 $ / shares shares
Restricted stock (in shares) | shares	334,608
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 63.29
Granted (in shares) | shares	106,760
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 115.41
Restrictions lapsed (in shares) | shares	(83,456)
Restrictions lapsed, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 62.85
Forfeited (in shares) | shares	(25,661)
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 65.73
Restricted stock (in shares) | shares	332,251
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 79.96

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Note 9 - Stock-based Compensation - Performance Stock (Details) - Performance Shares [Member]	9 Months Ended
	Sep. 30, 2018 $ / shares shares
Restricted stock (in shares) | shares	25,707
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 58.35
Granted (in shares) | shares	20,006
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 105.75
Restrictions lapsed (in shares) | shares
Restrictions lapsed, weighted-average grant date fair value (in dollars per share) | $ / shares
Performance change (in shares) | shares	6,427
Performance change, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 58.35
Forfeited (in shares) | shares
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares
Restricted stock (in shares) | shares	52,140
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 76.54

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Note 9 - Stock-based Compensation - Assumptions Used to Estimate the Fair Value of the ESPP (Details) - ESPP [Member]	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Expected life (Month)	180 days	180 days
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	1.48%	0.59%
Expected volatility	24.49%	34.51%
Maximum [Member]
Risk-free interest rate	2.06%	0.97%
Expected volatility	31.50%	39.51%

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Note 10 - Accumulated Other Comprehensive Loss - Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Balance beginning of period			$ 461,215
Balance at end of period	$ 531,206		531,206
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance beginning of period	(6,359)	$ (7,404)	(5,234)	$ (10,753)
Other comprehensive income (loss) before reclassifications	(879)	1,655	(2,004)	5,004
Amounts reclassified from accumulated other comprehensive loss
Net current-period other comprehensive income (loss)	(879)	1,655	(2,004)	5,004
Balance at end of period	$ (7,238)	$ (5,749)	$ (7,238)	$ (5,749)

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Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Expense (Benefit), Total	$ 4,484	$ 6,438	$ 12,817	$ 17,724
Effective Income Tax Rate Reconciliation, Percent, Total	17.60%	32.80%	18.30%	32.10%
Effective Income Tax Rate, Increase (Decrease), Percentage	(15.20%)		(13.80%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%		21.00%
Unrecognized Tax Benefits, Ending Balance	$ 3,900		$ 3,900		$ 4,200

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Note 12 - Segment Reporting - Revenue from Operations by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue	$ 115,430	$ 88,105	$ 332,827	$ 250,312
Operating Segments [Member] | United States Segment [Member]
Revenue	90,732	67,490	261,253	191,019
Operating Segments [Member] | Europe Segment [Member]
Revenue	21,273	18,094	61,431	51,224
Operating Segments [Member] | Japan Segment [Member]
Revenue	$ 3,425	$ 2,521	$ 10,143	$ 8,069

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Note 12 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income from operations	$ 25,031	$ 19,367	$ 68,743	$ 53,451
Operating Segments [Member] | United States Segment [Member]
Income from operations	31,726	26,903	92,258	76,973
Operating Segments [Member] | Europe Segment [Member]
Income from operations	5,478	3,251	12,879	9,626
Corporate and Reconciling Items [Member] | Corporate Unallocated and Japan Segment[Member]
Income from operations	$ (12,173)	$ (10,787)	$ (36,394)	$ (33,148)

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Note 12 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Long-lived assets	$ 210,053	$ 166,440
Operating Segments [Member] | United States Segment [Member]
Long-lived assets	168,903	125,308
Operating Segments [Member] | Europe Segment [Member]
Long-lived assets	33,783	33,691
Operating Segments [Member] | Japan Segment [Member]
Long-lived assets	$ 7,367	$ 7,441