10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

__________________________________________________ 

FORM 10-Q

 __________________________________________________ 

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2015

o 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 000-28440

 __________________________________________________ 

ENDOLOGIX, INC.

(Exact name of registrant as specified in its charter)

 __________________________________________________ 

Delaware	68-0328265
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

2 Musick, Irvine, California 92618

(Address of principal executive offices)

(949) 595-7200

(Registrant’s telephone number, including area code)

  ________________________________________________

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  x    No  o

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 (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x     No  o

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

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

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

On October 26, 2015, there were 67,789,498 shares outstanding of the registrant’s only class of common stock.

ENDOLOGIX, INC.

QUARTERLY REPORT ON FORM 10-Q

FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2015

TABLE OF CONTENTS

Item	Description	Page
Part I. Financial Information
Item 1.	Condensed Consolidated Financial Statements (Unaudited):
	Condensed Consolidated Balance Sheets at September 30, 2015 and December 31, 2014	1
	Condensed Consolidated Statements of Operations and Comprehensive Loss for the three and nine months ended September 30, 2015 and 2014	2
	Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2015 and 2014	3
	Notes to Condensed Consolidated Financial Statements	4
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	19
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	28
Item 4.	Controls and Procedures	28
Part II. Other Information
Item 1.	Legal Proceedings	30
Item 6.	Exhibits	30
	Signatures	31

Part I. Financial Information

ENDOLOGIX, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share and par value amounts)

(Unaudited)

	September 30,			December 31,
	2015			2014
ASSETS
Current assets:
Cash and cash equivalents	$	35,404		$	26,798
Marketable securities	32,891			59,871
Accounts receivable, net allowance for doubtful accounts of $283 and $185, respectively.	27,158			26,113
Other receivables	304			498
Inventories	33,422			31,325
Prepaid expenses and other current assets	3,113			3,162
Total current assets	$	132,292		$	147,767
Property and equipment, net	23,865			25,696
Goodwill	28,731			28,866
Intangibles, net	42,278			43,465
Deposits and other assets	1,985			2,415
Total assets	$	229,151		$	248,209
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	13,788		$	11,027
Accrued payroll	13,800			13,337
Accrued expenses and other current liabilities	5,379			5,260
Total current liabilities	$	32,967		$	29,624
Deferred income tax	879			879
Deferred rent	8,065			8,060
Other liabilities	279			489
Contingently issuable common stock	14,800			14,600
Convertible notes	73,052			70,407
Total liabilities	$	130,042		$	124,059
Commitments and contingencies
Stockholders’ equity:
Convertible preferred stock, $0.001 par value; 5,000,000 shares authorized. No shares issued and outstanding.	—			—
Common stock, $0.001 par value; 100,000,000 shares authorized. 67,968,865 and 67,321,769 shares issued, respectively. 67,788,911 and 67,159,511 shares outstanding, respectively.	68			67
Treasury stock, at cost, 179,954 and 162,258 shares, respectively.	(2,619		)	(2,328		)
Additional paid-in capital	384,226			372,639
Accumulated deficit	(283,631		)	(248,500		)
Accumulated other comprehensive income	1,065			2,272
Total stockholders’ equity	$	99,109		$	124,150
Total liabilities and stockholders’ equity	$	229,151		$	248,209

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

1

ENDOLOGIX, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(In thousands, except per share amounts)

(Unaudited)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Revenue	$	38,231		$	37,150		$	114,380		$	108,741
Cost of goods sold	11,195			13,573			36,306			32,362
Gross profit	27,036			23,577			78,074			76,379
Operating expenses:
Research and development	5,459			5,313			17,683			13,876
Clinical and regulatory affairs	3,956			2,482			11,003			7,404
Marketing and sales	19,662			18,438			59,103			53,748
General and administrative	7,293			6,271			21,432			19,366
Total operating expenses	36,370			32,504			109,221			94,394
Loss from operations	(9,334		)	(8,927		)	(31,147		)	(18,015		)
Other income (expense):
Interest income	34			63			116			189
Interest expense	(1,506		)	(1,422		)	(4,460		)	(4,261		)
Other income (expense), net	(89		)	(4,198		)	735			(3,987		)
Change in fair value of contingent consideration related to acquisition	—			200			(200		)	8,228
Total other income (expense)	(1,561		)	(5,357		)	(3,809		)	169
Net loss before income tax (expense) benefit	$	(10,895	)	$	(14,284	)	$	(34,956	)	$	(17,846	)
Income tax (expense) benefit	(22		)	346			(175		)	210
Net loss	$	(10,917	)	$	(13,938	)	$	(35,131	)	$	(17,636	)
Other comprehensive income (loss) foreign currency translation	463			2,704			(1,207		)	2,727
Comprehensive loss	$	(10,454	)	$	(11,234	)	$	(36,338	)	$	(14,909	)
Basic and diluted net loss per share	$	(0.16	)	$	(0.21	)	$	(0.52	)	$	(0.28	)
Shares used in computing basic and diluted net loss per share	67,810			65,494			67,568			63,444

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

2

ENDOLOGIX, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Nine Months Ended September 30,
	2015			2014
Cash flows from operating activities:
Net loss	$	(35,131	)	$	(17,636	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,561			1,938
Stock-based compensation	7,169			5,568
Change in fair value of contingent consideration related to acquisition	200			(8,228		)
Accretion of interest on convertible note	2,645			2,453
Amortization of deferred financing costs	354			303
Non-cash foreign exchange (gain) loss	(593		)	4,050
Changes in operating assets and liabilities:
Accounts receivable and other receivables	(1,343		)	(1,343		)
Inventories	(1,889		)	(8,512		)
Prepaid expenses and other current assets	148			(880		)
Accounts payable	4,730			2,208
Accrued payroll	633			1,576
Accrued expenses and other liabilities	182			3,231
Net cash used in operating activities	$	(18,334	)	$	(15,272	)
Cash flows from investing activities:
Purchases of marketable securities	(52,420		)	(107,454		)
Maturities of marketable securities	79,340			64,820
Purchases of property and equipment	(3,572		)	(9,902		)
Net cash provided by (used in) investing activities	$	23,348		$	(52,536	)
Cash flows from financing activities:
Proceeds from sale of common stock under employee stock purchase plan	2,787			1,446
Proceeds from exercise of stock options	1,631			1,596
Minimum tax withholding paid on behalf of employees for restricted stock units	(291		)	(2,320		)
Net cash provided by financing activities	$	4,127		$	722
Effect of exchange rate changes on cash and cash equivalents	(535		)	(529		)
Net increase (decrease) in cash and cash equivalents	$	8,606		$	(67,615	)
Cash and cash equivalents, beginning of period	26,798			95,152
Cash and cash equivalents, end of period	$	35,404		$	27,537
Supplemental disclosure of cash flow information:
Cash paid for interest	$	976		$	1,047
Cash paid for income taxes	$	162		$	239
Non-cash investing and financing activities:
Landlord funded leasehold improvements	$	46		$	6,669
Fair value of Nellix Milestone Shares (note 9)	$	—		$	38,372
Acquisition of property and equipment included in accounts payable	$	43		$	2,351

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

3

ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

1. Description of Business, Basis of Presentation, and Operating Segment

(a) Description of Business

Endologix, Inc. (the "Company") is a Delaware corporation with corporate headquarters and production facilities located in Irvine, California. The Company develops, manufactures, markets, and sells innovative medical devices for the treatment of aortic disorders. The Company's products are intended for the minimally invasive endovascular treatment of abdominal aortic aneurysms ("AAA"). The Company's AAA products are built on one of two platforms: (1) traditional minimally-invasive endovascular repair ("EVAR") or (2) endovascular sealing (“EVAS”), the Company's innovative solution for sealing the aneurysm sac while maintaining blood flow through two blood flow lumens. The Company's current EVAR products include the Endologix AFX Endovascular AAA System (“AFX”), the VELA Proximal Endograft (“VELA”) and the Endologix Intuitrak Endovascular AAA System (“Intuitrak”). The Company's current EVAS product is the Nellix Endovascular Aneurysm Sealing System (“Nellix EVAS System”). Sales of the Company's EVAR and EVAS platforms (including extensions and accessories) to hospitals in the U.S. and Europe, and to third-party international distributors, provide the sole source of the Company's reported revenue.

The Company's EVAR products consist of (i) a cobalt chromium alloy stent covered by polytetrafluoroethylene (commonly referred to as "ePTFE") graft material (“Stent Graft”) and (ii) an accompanying delivery system. Once fixed in its proper position within the abdominal aorta, the Company's EVAR device provides a conduit for blood flow, thereby relieving pressure within the weakened or “aneurysmal” section of the vessel wall, which greatly reduces the potential for the AAA to rupture.

The Company's EVAS product consists of (i) bilateral covered stents with endobags, (ii) a biocompatible polymer injected into the endobags to seal the aneurysm and (iii) a delivery system and polymer dispenser. The Company's EVAS product seals the entire aneurysm sac effectively excluding the aneurysm sac reducing the likelihood of future aneurysm rupture. Additionally, it has the potential to reduce post procedural re-interventions.

(b)Basis of Presentation

The accompanying Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q have been prepared in accordance with generally accepted accounting principles in the United States of America ("GAAP") and the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). These financial statements include the financial position, results of operations, and cash flows of the Company, including its subsidiaries, all of which are wholly-owned. All inter-company accounts and transactions have been eliminated in consolidation. For the three and nine months endedSeptember 30, 2015 and 2014, there were no related party transactions.

The interim financial data as of September 30, 2015 is unaudited and is not necessarily indicative of the results for a full year. In the opinion of the Company's management, the interim data includes normal and recurring adjustments necessary for a fair presentation of the Company's financial results for the three and nine months endedSeptember 30, 2015. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to SEC rules and regulations relating to interim financial statements.

The accompanying Condensed Consolidated Financial Statements should be read in conjunction with the Company's audited Consolidated Financial Statements and Notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2014, filed with the SEC on March 2, 2015.

On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU ") No. 2014-09, "Revenue from Contracts with Customers", which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The FASB agreed to a one-year deferral of the revenue recognition standard's effective date for all entities. The new standard is effective for the Company on January 1, 2018. The standard permits the use of either the retrospective or cumulative effect transition method. Early application is permitted, but not before the original effective date, which would have been January 1, 2017 for the Company. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.

4

ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

On April 7, 2015, the FASB issued ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs", which requires debt issuance costs related to a recognized debt liability to be presented on the balance sheet as a direct deduction from the debt liability, similar to the presentation of debt discounts. The ASU is effective for the Company on January 1, 2016. Early adoption is permitted. The Company is evaluating the effect that ASU 2015-03 will have on its consolidated financial statements and related disclosures.

On July 22, 2015, the FASB issued ASU No. 2015-11, “Simplifying the Measurement of Inventory,” which requires an entity to measure inventory within the scope of the amendment at the lower of cost and net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The guidance is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The Company is currently assessing the impact this guidance will have on its consolidated financial statements.

In September 2015, the FASB issued ASU No. 2015-16, “Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments,” which requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The new guidance also requires that the acquirer record, in the same period's financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The guidance is effective for fiscal years beginning after December 15, 2016, and interim periods within fiscal years beginning after December 15, 2017. Early adoption is permitted. The Company is currently assessing the impact this guidance will have on its consolidated financial statements

(c) Operating Segment

The Company has one operating and reporting segment that is focused exclusively on the development, manufacture, marketing, and sale of EVAR and EVAS product for the treatment of aortic disorders. For the three and nine months endedSeptember 30, 2015, all of the Company's revenue and related expenses were solely attributable to these activities. Substantially all of the Company's long-lived assets are located in the U.S.

2. Use of Estimates and Summary of Significant Accounting Policies

The preparation of financial statements in conformity with GAAP requires the Company's management to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenue and expenses, and related disclosure of contingent liabilities. On an on-going basis, the Company's management evaluates its estimates, including those related to (i) collectibility of customer accounts; (ii) whether the cost of inventories can be recovered; (iii) the value of goodwill and intangible assets; (iv) realization of tax assets and estimates of tax liabilities; (v) likelihood of payment and value of contingent liabilities; and (vi) potential outcome of litigation. Such estimates are based on management's judgment which takes into account historical experience and various assumptions. Nonetheless, actual results may differ from management's estimates.

For a complete summary of our significant accounting policies, please refer to Note 2, "Use of Estimates and Summary of Significant Accounting Policies", in Part II, Item 8, of our 2014 Annual Report on Form 10-K for the year ended December 31, 2014, filed March 2, 2015. There have been no material changes to our significant accounting policies during the three and nine months endedSeptember 30, 2015.

5

ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

3. Balance Sheet Account Detail

(a) Property and Equipment

Property and equipment consisted of the following:

	September 30, 2015			December 31, 2014
Production equipment, molds, and office furniture	$	13,293		$	12,943
Computer hardware and software	6,267			6,457
Leasehold improvements	14,336			15,729
Construction in progress (software and related implementation, production equipment, and leasehold improvements)	346			2,564
Property and equipment, at cost	$	34,242		$	37,693
Accumulated depreciation	(10,377		)	(11,997		)
Property and equipment, net	$	23,865		$	25,696

Depreciation expense for property and equipment for the three months endedSeptember 30, 2015 and 2014 was $1.2 million and $0.6 million, respectively. For the nine months endedSeptember 30, 2015 and 2014 depreciation expense for property and equipment was $3.4 million and $1.6 million, respectively.

(b) Inventories

Inventories consisted of the following:

	September 30, 2015		December 31, 2014
Raw materials	$	6,919	$	6,728
Work-in-process	7,329		5,946
Finished goods	19,174		18,651
Total Inventories	$	33,422	$	31,325

6

ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

(c) Goodwill and Intangible Assets

The following table presents goodwill, indefinite lived intangible assets, finite lived intangible assets and related accumulated amortization:

	September 30, 2015			December 31, 2014
Goodwill (1)	$	28,731		$	28,866
Intangible assets:
Indefinite lived intangibles
Trademarks and trade names	$	2,708		$	2,708
Finite lived intangibles
Developed technology (2)	$	40,100		$	40,100
Accumulated amortization	(620		)	(285		)
Developed technology, net	$	39,480		$	39,815
License	$	100		$	100
Accumulated amortization	(93		)	(71		)
License, net	$	7		$	29
Customer relationships	$	—		$	480
Accumulated amortization	—			(400		)
Customer relationships, net	$	—		$	80
Acquired Shonin approval (3)	$	1,000		$	1,000
Accumulated amortization	(917		)	(167		)
Acquired Shonin approval, net	$	83		$	833
Intangible assets (excluding goodwill), net	$	42,278		$	43,465

(1) Difference in the value between these dates is solely due to a foreign currency translation adjustment.

(2) Was reclassified in the first quarter of 2013 from in-process research and development to finite lived intangibles, which coincided with the European commercial launch of the product (Nellix EVAS System) associated with this intangible asset. A significant portion of this intangible asset will not begin amortization until the U.S. launch of this product, currently scheduled for 2016.

(3) Regulatory approval for Intuitrak in Japan acquired through an amendment with a distributor in the fourth quarter of 2014.

Amortization expense for intangible assets for the three months endedSeptember 30, 2015 and 2014 was $0.4 million and $0.1 million, respectively. For the nine months endedSeptember 30, 2015 and 2014 amortization expense for intangible assets was $1.2 million and $0.3 million, respectively.

7

ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

Estimated amortization expense for the five succeeding years and thereafter (which includes amortization of intangible assets which commenced in February 2013 with the commercial launch of the Nellix System in Europe) is as follows:

Remainder of 2015	$	202
2016	715
2017	1,717
2018	3,207
2019	4,397
2020	5,702
2021 & Thereafter	23,630
Total	$	39,570

(d) Marketable securities

Investments in held-to-maturity marketable securities consist of the following at September 30, 2015 and December 31, 2014:

	September 30, 2015
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Asset backed securities	$	193	$	—	$	—		$	193
Agency bonds	4,000		—		—			4,000
Corporate bonds	1,703		—		(1		)	1,702
Commercial paper	10,094		1		—			10,095
Government securities	16,901		9		—			16,910
Total	$	32,891	$	10	$	(1	)	$	32,900
	December 31, 2014
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Asset backed securities	$	3,633	$	—	$	—		$	3,633
Corporate bonds	15,707		—		(8		)	15,699
Commercial paper	40,531		5		—			40,536
Total	$	59,871	$	5	$	(8	)	$	59,868

At September 30, 2015, the Company’s investments included 5 held-to-maturity debt securities in unrealized loss positions with a total unrealized loss of approximately $1 thousand and a total fair market value of approximately $7.3 million. All investments with gross unrealized losses have been in unrealized loss positions for less than 7 months. The unrealized losses were caused by interest rate fluctuations. There was no change in the credit risk of the securities. The Company does not intend to sell the securities and it is not likely that the Company will be required to sell the securities before the expected recovery of their amortized cost bases. There were no realized gains or losses on the investments for the three and nine months endedSeptember 30, 2015. All of the Company's investments of held-to-maturity securities will mature within less than 12 months with an average maturity of 6 months.

8

ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

(e) Fair Value Measurements

The following fair value hierarchy table presents information about each major category of the Company’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014:

	Fair value measurement at reporting date using:
	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2015
Cash and cash equivalents	$	35,404	$	—	$	—	$	35,404
Contingently issuable common stock	$	—	$	—	$	14,800	$	14,800
At December 31, 2014
Cash and cash equivalents	$	26,798	$	—	$	—	$	26,798
Contingently issuable common stock	$	—	$	—	$	14,600	$	14,600

There were no re-measurements to fair value during the nine months ended September 30, 2015 of financial assets and liabilities that are not measured at fair value on a recurring basis. There were no transfers between Level 1, Level 2 or Level 3 securities during the nine months ended September 30, 2015.

(f) Financial Instruments Not Recorded at Fair Value on a Recurring Basis

We measure the fair value of our 2.25% Convertible Senior Notes due 2018 ("Senior Notes") carried at amortized cost quarterly for disclosure purposes. The estimated fair value of the Senior Notes is determined by Level 2 inputs and is based primarily on quoted market prices for the same or similar issues. Based on the market prices, the fair value of our long-term debt was $77.2 million as of September 30, 2015 and $84.5 million as of December 31, 2014.

We measure the fair value of our held-to-maturity marketable securities carried at amortized cost quarterly for disclosure purposes. The fair value of marketable securities is determined by Level 2 inputs and is based primarily on quoted market prices for the same or similar instruments.

4. Stock-Based Compensation

The Company classifies stock-based compensation expense in the accompanying Condensed Consolidated Statements of Operations and Comprehensive Loss, based on the department to which the recipient belongs. Stock-based compensation expense included in cost of goods sold and operating expenses during the three and nine months endedSeptember 30, 2015 and 2014, was as follows:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2015		2014			2015		2014
Cost of goods sold	$	257	$	240		$	731	$	643
Operating expenses:
Research and development	252		207			737		543
Clinical and regulatory affairs	321		(195		)	749		67
Marketing and sales	888		931			2,476		2,125
General and administrative	832		632			2,476		2,190
Total operating expenses	$	2,293	$	1,575		$	6,438	$	4,925
Total	$	2,550	$	1,815		$	7,169	$	5,568

9

ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

5. Net Loss Per Share

Net loss per share was calculated by dividing net loss by the weighted average number of common shares outstanding for the three and nine months endedSeptember 30, 2015 and 2014.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net loss	$	(10,917	)	$	(13,938	)	$	(35,131	)	$	(17,636	)
Shares used in computing basic and diluted net loss per share	67,810			65,494			67,568			63,444
Basic and diluted net loss per share	$	(0.16	)	$	(0.21	)	$	(0.52	)	$	(0.28	)

The following outstanding Company securities, using the treasury stock method, were excluded from the above calculations of net loss per share because their impact would have been anti-dilutive:

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Common stock options	1,600	1,816	1,739	1,881
Restricted stock awards	135	240	133	360
Restricted stock units	207	162	247	191
Total	1,942	2,218	2,119	2,432

As discussed in Note 6, in December 2013, the Company issued $86.3 million in aggregate principal amount of 2.25% convertible senior notes due 2018 (the “Senior Notes”) in an underwritten public offering. Upon any conversion, the Senior Notes may be settled, at the Company’s election, in cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock. For purposes of calculating the maximum dilutive impact, it is presumed that the Senior Notes will be settled in common stock with the resulting potential common shares included in diluted earnings per share if the effect is more dilutive. The effect of the conversion of the Senior Notes is excluded from the calculation of diluted loss per share because the impact of these securities would be anti-dilutive. The potential dilutive effect of these securities is shown in the chart below:

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Conversion of the Notes	3,588	3,588	3,588	3,588

The effect of the contingently issuable common stock is excluded from the calculation of basic net loss per share until all necessary conditions for issuance have been satisfied. Refer to Note 9 of the Notes to the Condensed Consolidated Financial Statements for further discussion.

6. Credit Facilities

2.25% Convertible Senior Notes

On December 10, 2013, the Company issued $86.3 million in aggregate principal amount of 2.25% Convertible Senior Notes (the “Senior Notes”). The Senior Notes mature on December 15, 2018 unless earlier repurchased by the Company or converted. The Company received net proceeds of approximately $82.6 million from the sale of the Senior Notes, after deducting underwriting discounts and commissions and offering expenses payable by the Company. Interest is payable on the Senior Notes on June 15 and December 15 of each year, beginning June 15, 2014.

The Senior Notes are governed by the terms of a base indenture (the “Base Indenture”), as supplemented by the first supplemental indenture relating to the Senior Notes (the “First Supplemental Indenture,” and together with the Base Indenture,

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ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

the “Indenture”), between the Company and Wells Fargo Bank, National Association (the “Trustee”), each of which were entered into on December 10, 2013.

The Senior Notes are senior unsecured obligations and are: (a) senior in right of payment to the Company’s future indebtedness that is expressly subordinated in right of payment to the Senior Notes; (b) equal in right of payment to the Company’s existing and future unsecured indebtedness that is not so subordinated; (c) effectively junior to any of the Company’s secured indebtedness to the extent of the value of the assets securing such indebtedness; and (d) and structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company’s subsidiaries.

The Company may not redeem the Senior Notes prior to December 15, 2016. On or after December 15, 2016, the Company may redeem for cash all or any portion of the Senior Notes, at its option, but only if the closing sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period ending on, and including, the second trading day immediately preceding the date on which the Company provides notice of redemption, exceeds 130% of the conversion price on each applicable trading day. The redemption price will equal 100% of the principal amount of the Senior Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the Senior Notes.

Holders may convert their Senior Notes at any time prior to the close of business on the business day immediately preceding September 15, 2018 only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on March 31, 2014, if the closing sale price of the Company’s common stock, for at least 20 trading days (whether or not consecutive) in the period of 30 consecutive trading days ending on the last trading day of the calendar quarter immediately preceding the calendar quarter in which the conversion occurs, is more than 130% of the conversion price of the Senior Notes in effect on each applicable trading day; (2) during the five consecutive business-day period following any five consecutive trading-day period in which the trading price for the Senior Notes for each such trading day was less than 98% of the closing sale price of the Company’s common stock on such date multiplied by the then-current conversion rate; (3) if the Company calls all or any portion of the notes for redemption, at any time prior to the close of business on the second scheduled trading day prior to the redemption date; or (4) upon the occurrence of specified corporate events. On or after September 15, 2018 until the close of business on the second scheduled trading day immediately preceding the stated maturity date, holders may surrender their Senior Notes for conversion at any time, regardless of the foregoing circumstances.

Upon conversion, the Company will, at its election, pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock.

The initial conversion rate of the Senior Notes will be 41.6051 shares of the Company’s common stock for each $1,000 principal amount of Senior Notes, which represents an initial conversion price of approximately $24.04 per share. Following certain corporate transactions that occur on or prior to the stated maturity date or the Company’s delivery of a notice of redemption, the Company will increase the conversion rate for a holder that elects to convert its Senior Notes in connection with such a corporate transaction.

If a fundamental change (as defined in the Indenture) occurs prior to the stated maturity date, holders may require the Company to purchase for cash all or any portion of their Senior Notes at a fundamental change purchase price equal to 100% of the principal amount of the Senior Notes to be purchased, plus accrued and unpaid interest to, but excluding, the fundamental change purchase date.

The Indenture contains customary terms and covenants and events of default with respect to the Senior Notes. If an event of default (as defined in the Indenture) occurs and is continuing, either the Trustee or the holders of at least 25% in aggregate principal amount of the outstanding Senior Notes may declare the principal amount of the Senior Notes to be due and payable immediately by notice to the Company (with a copy to the Trustee). If an event of default arising out of certain events of bankruptcy, insolvency or reorganization involving the Company or a significant subsidiary (as set forth in the Indenture) occurs with respect to us, the principal amount of the Senior Notes and accrued and unpaid interest, if any, will automatically become immediately due and payable.

The Company was not required to separate the conversion option in the Senior Notes under ASC 815, "Derivatives and Hedging", and has the ability to settle the Senior Notes in cash, common stock or a combination of cash and common stock, at its option. In accordance with cash conversion guidance contained in ASC 470-20, "Debt with Conversion and Other Options", the Company accounted for the Senior Notes by allocating the issuance proceeds between the liability and the equity component. The

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ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

equity component is classified in stockholders’ equity and the resulting discount on the liability component is accreted such that interest expense equals the Company’s nonconvertible debt borrowing rate. The separation was performed by first determining the fair value of a similar debt that does not have an associated equity component. That amount was then deducted from the initial proceeds of the Senior Notes as a whole to arrive at a residual amount, which was allocated to the conversion feature that is classified as equity. The initial fair value of the indebtedness was $66.9 million resulting in a $19.3 million allocation to the embedded conversion option. The embedded conversion option was recorded in stockholders’ equity and as debt discount, to be subsequently accreted to interest expense over the term of the Senior Notes. Underwriting discounts and commissions and offering expenses totaled $3.7 million and were allocated between the liability and the equity component in proportion to the allocation of proceeds and accounted for as debt issuance costs and equity issuance costs, respectively. As a result, $2.9 million attributable to the indebtedness was recorded as deferred financing costs in other assets, to be subsequently amortized as interest expense over the term of the Senior Notes, and $0.8 million attributable to the equity component was recorded as a reduction to additional paid-in-capital in stockholders’ equity.

As of September 30, 2015, the Company had outstanding borrowings of $73.1 million, and deferred financing costs of $2.1 million, related to the Senior Notes. There are no principal payments due during the term. Annual interest expense on these notes will range from $5.7 million to $6.9 million through maturity.

Capped Call Transactions

On December 10, 2013, in connection with the pricing of the Senior Notes and the exercise in full of their overallotment option by the underwriters, the Company entered into privately-negotiated capped call transactions (the “Capped Call Transactions”) with Bank of America, N.A., an affiliate of Merrill Lynch, Pierce, Fenner & Smith Incorporated. The Capped Call Transactions initial conversion rate and number of options substantially corresponds to each $1,000 principal amount of Senior Notes. The Company used approximately $7.4 million of the net proceeds from the Senior Notes offering to pay for the cost of the Capped Call Transactions.

The Capped Call Transactions are separate transactions entered into by the Company with Bank of America, N.A., are not part of the terms of the Senior Notes and will not change the holders’ rights under the Senior Notes. The Capped Call Transactions have anti-dilution adjustments substantially similar to those applicable to the Senior Notes. The Capped Call Transactions are derivative instruments that are recorded within stockholders’ equity because they meet an exemption from mark-to-market derivative accounting.

The Capped Call Transactions are expected generally to reduce the potential dilution and/or offset potential cash payments that the Company is required to make in excess of the principal amount upon conversion of the Senior Notes in the event that the market price per share of the Company’s common stock, as measured under the terms of the Capped Call Transactions, is greater than the strike price of the Capped Call Transactions, which initially corresponds to the $24.04 conversion price of the Senior Notes. If, however, the market price per share of the Company’s common stock, as measured under the terms of the Capped Call Transactions, exceeds the initial cap price of $29.02, there would nevertheless be dilution and/or there would not be an offset of such potential cash payments, in each case, to the extent that such market price exceeds the cap price of the Capped Call Transactions.

The Company will not be required to make any cash payments to Bank of America, N.A. or any of its affiliates upon the exercise of the options that are a part of the Capped Call Transactions, but will be entitled to receive from Bank of America, N.A. (or an affiliate thereof) a number of shares of the Company’s common stock and/or an amount of cash generally based on the amount by which the market price per share of the Company’s common stock, as measured under the terms of the Capped Call Transactions, is greater than the strike price of the Capped Call Transactions during the relevant valuation period under the Capped Call Transactions. However, if the market price of the Company’s common stock, as measured under the terms of the Capped Call Transactions, exceeds the cap price of the Capped Call Transactions during such valuation period under the Capped Call Transactions, the number of shares of common stock and/or the amount of cash the Company expects to receive upon exercise of the Capped Call Transactions will be capped based on the amount by which the cap price exceeds the strike price of the Capped Call Transactions.

For any conversions of Senior Notes prior to the close of business on the 55th scheduled trading day immediately preceding the stated maturity date of the Senior Notes, including without limitation upon an acquisition of the Company or similar business combination, a corresponding portion of the Capped Call Transactions will be terminated. Upon such termination, the portion of the Capped Call Transactions being terminated will be settled at fair value (subject to certain limitations), as determined by Bank

12

ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

of America, N.A., in its capacity as calculation agent under the Capped Call Transactions, which the Company expects to receive from Bank of America, N.A., and no payments will be due Bank of America, N.A. The capped call expires on December 13, 2018.

Wells Fargo line of credit

In October 2009, the Company entered into a revolving credit facility with Wells Fargo Bank (“Wells”), which was last amended on February 3, 2015, whereby the Company may borrow up to $20.0 million, subject to the calculation and limitation of a borrowing base (the “Wells Credit Facility”). A sub-feature in the line of credit allowed for the issuance of up to $7.5 million in letters of credit. The Wells Credit Facility was collateralized by all of the Company's assets, except its intellectual property.

The Wells Credit Facility contained financial covenants requiring the Company to (i) maintain a minimum current ratio of 2.0 , equal to the quotient of modified current assets to current liabilities, as defined in the Wells Credit Facility (the "Current Ratio Covenant"), and (ii) not to exceed pre-tax net loss (excluding non-cash contingent consideration associated with the acquisition of Nellix) of $13.5 million for the three months ended March 31, 2015; $23.0 million for the six months ended June 30, 2015; and $35.0 million for the nine months ended September 30, 2015; (the "Net Loss Covenant"). The Wells Credit Facility also included negative covenants limiting capital expenditures in 2015 to an aggregate of $6.0 million as well as limiting operating lease expenses to $3.0 million in any calendar year. The financial covenants as of and for the three and nine months endedSeptember 30, 2015 were no longer applicable due to the termination of the Wells Credit Facility on July 21, 2015.

The Wells Credit Facility also contained a “material adverse change” clause (“MAC”). If the Company encountered difficulties that would qualify as a MAC in its (i) operations, (ii) condition (financial or otherwise), or (iii) ability to repay amounts outstanding under the Wells Credit Facility, it could be canceled at Wells' sole discretion. Wells could then elect to declare the indebtedness, together with accrued interest and other fees, to be immediately due and payable and proceed against any collateral securing such indebtedness. On July 21, 2015, the Company terminated the credit facility. As of the termination date, the Company had no outstanding borrowings or letters of credits issued under the Wells Credit Facility.

Bank of America line of credit

On July 21, 2015, the Company entered into a revolving credit facility with Bank of America, N.A. (“BOA”), whereby the Company may borrow up to $20.0 million (the “BOA Credit Facility”). All amounts owing under the BOA Credit Facility will become due and payable upon its expiration on July 21, 2017. A sub-feature in the line of credit allows for the issuance of up to $10.0 million in letters of credit. As of September 30, 2015, the Company issued a total of $1.0 million of letters of credit under the BOA credit facility. The BOA Credit Facility is collateralized by all of the Company's assets, except its intellectual property. The BOA Credit Facility can be terminated at any time during the two years by Company upon three business day notice. The BOA Credit Facility usage is priced at a spread over the one, two, three and six month LIBOR rates, and is subject to a covenant related to timely providing of publicly reported information, other indebtedness and a liquidity covenant tied to “Unencumbered Liquid Assets” ("ULA") (as defined here) of not less than $30.0 million. ULA means the following assets (excluding assets of any retirement plan): (a) cash and cash equivalents; (b) marketable securities invested in accordance with the Company’s investment policy and (c) marketable securities invested in accordance with any update to the Company’s investment policy so long as such update been approved by BOA in its reasonable discretion. Such assets must be (i) held in the United States at BOA and/or its affiliates, (ii) not the subject of any lien, pledge, security interest or other arrangement with any creditor (other than BOA or one of BOA’s affiliates) to have his claim satisfied out of the asset (or proceeds thereof) prior to the general creditors of the owner of the asset, (iii) held solely in the name of one or more credit parties subject to this covenant (with no other persons or entities having ownership rights therein), (iv) convertible to cash within five (5) days, and (v) not counted or included to satisfy any other liquidity requirement under any other obligation, whether with BOA or any other lender, unless otherwise expressly agreed by BOA in writing. The Company was in compliance with this covenant as of September 30, 2015.

If not in default, the Company has the ability to reduce the ULA covenant requirement by reducing the BOA Credit Facility, with the ULA maintained at 1.5 times the BOA Credit Facility. As of September 30, 2015, the Company had no borrowings under the BOA Credit Facility.

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ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

7. Revenue by Geographic Region

The Company's revenue by geographic region, was as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
United States	$	26,915	70.4%	$	27,067	72.9%	$	80,825	70.7%	$	79,048	72.7%
Europe	$	7,789	20.4%	$	6,937	18.7%	$	22,923	20.0%	$	21,337	19.6%
Rest of World ("ROW"):
Latin America	$	1,908	5.0%	$	1,858	5.0%	$	5,168	4.5%	$	4,085	3.8%
Asia/Pacific	1,619		4.2%	1,288		3.5%	5,464		4.8%	4,271		3.9%
Total ROW	$	3,527	9.2%	$	3,146	8.5%	$	10,632	9.3%	$	8,356	7.7%
Revenue	$	38,231	100.0%	$	37,150	100.0%	$	114,380	100.0%	$	108,741	100.0%

8. Commitments and Contingencies

(a) Leases

The Company leases its administrative, research, and manufacturing facilities located in Irvine, California and an administrative office located in Rosmalen, The Netherlands. These facility lease agreements require the Company to pay operating costs, including property taxes, insurance and maintenance. In addition, the Company has certain equipment under long-term agreements that are accounted for as operating leases.

Future minimum payments by year under non-cancelable leases with initial terms in excess of one year were as follows as of September 30, 2015:

Remainder of 2015	$	589
2016	2,468
2017	2,450
2018	2,385
2019	2,389
2020	2,504
2021 and thereafter	22,884
Total	$	35,669

Facilities rent expense for the three months endedSeptember 30, 2015 and 2014 was $0.6 million and $0.7 million, respectively. For the nine months endedSeptember 30, 2015 and 2014, facilities rent expense was $1.8 million and $2.1 million, respectively.

On June 12, 2013, the Company entered into a lease agreement for two adjacent office, research and development, and manufacturing facilities in Irvine, California.  The premises consist of approximately 129,000 combined square feet. The lease has a 15-year term beginning January 1, 2014 and provides for one optional five year extension. The initial base rent under the lease is $1.9 million per year, payable in monthly installments, and escalates by 3% per year for years 2015 through 2019, and 4% per year for years 2020 and beyond.  The Company received a rent abatement for the first nine months of the lease. These premises replaced the Company's existing Irvine facilities. The terms of this lease agreement provide for $6.8 million of landlord-funded improvements (and certain other allowances) to this facility, in order to best suit the Company's requirements.

The Company leased two adjacent facilities aggregating approximately 57,000 square feet in Irvine, California, under separate lease agreements where manufacturing was held. The Company exited one of these leases in December 2014 and the

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ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

other lease in April 2015. The Company's Rosmalen facility is an administrative office of approximately 2,900 square feet and in August 2015, the Company extended the lease term for Rosmalen facility until December 2020.

(b) Employment Agreements and Retention Plan

On February 1, 2014, the Company entered into new employment agreements with certain of its executive officers under which payment and benefits would become payable in the event of termination by the Company for any reason other than cause, death or disability or termination by the employee for good reason (collectively, an “Involuntary Termination”) prior to, upon or following a change in control of the Company. The severance payment will generally be in a range of six to eighteen months of the employee’s then current salary for an Involuntary Termination prior to a change in control of the Company, and will generally be in a range of eighteen to twenty-four months of the employee’s then current salary for an Involuntary Termination upon or following a change in control of the Company.

(c) Legal Matters

We are from time to time involved in various claims and legal proceedings of a nature we believe are normal and incidental to a medical device business. These matters may include product liability, intellectual property, employment, and other general claims. Such cases and claims may raise complex factual and legal issues and are subject to many uncertainties, including, but not limited to, the facts and circumstances of each particular case or claim, the jurisdiction in which each suit is brought, and differences in applicable law. We accrue for contingent liabilities when it is probable that a liability has been incurred and the amount can be reasonably estimated. The accruals are adjusted periodically as assessments change or as additional information becomes available.

LifePort Sciences LLC v. Endologix, Inc.

On December 28, 2012, LifePort Sciences, LLC ("LifePort") filed a complaint against us in the U.S. District Court, District of Delaware, alleging that certain of our products infringe U.S. Patent Nos. 5,489,295, 6,117,167, 6,302,906, 5,993,481 and 5,676,696, which are alleged to be owned by LifePort. LifePort is seeking an unspecified amount of monetary damages for sale of our products and injunctive relief. We do not believe that we infringe on any of these patents and we intend to vigorously defend against this matter. The case is currently scheduled for trial in April 2016. We do believe, however, that the outcome will not have a material adverse effect on our financial position, results of operations, or cash flows. However, in order to avoid further legal costs and diversion of management resources, it is reasonably possible that we may reach a settlement with LifePort, which could result in a liability. However, we cannot presently estimate the amount, or range, of reasonably possible losses due to the nature of this potential litigation settlement.

9. Contingently Issuable Common Stock

On October 27, 2010, the Company entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”) with Nepal Acquisition Corporation, a wholly-owned subsidiary of the Company (“Merger Sub”), Nellix, Inc. ("Nellix"), certain of Nellix’s stockholders named therein and Essex Woodlands Health Ventures, Inc., as representative of the former Nellix stockholders. On December 10, 2010 (the “Nellix Closing Date”), the Company completed the merger (the “Merger”) of Merger Sub with and into Nellix pursuant to the terms of the Merger Agreement. The purchase price consisted of 3.2 million shares of the Company's common stock, issuable to the former Nellix stockholders as of the Nellix Closing Date, then representing a value of $19.4 million. Under the agreement, additional payments, solely in the form of shares of the Company's common stock (the “Contingent Payment”), could be made upon the achievement of a revenue milestone and a regulatory approval milestone (collectively, the “Nellix Milestones”).

Under the merger agreement, the ultimate value of each Contingent Payment would be determined on the date that each Nellix Milestone is achieved. The number of issuable shares would be established using an applicable per share price, which is subject to a ceiling and/or floor, resulting at the closing of the merger in a potential maximum of 10.2 million shares issuable upon the achievement of the Nellix Milestones. As of the Closing Date, the aggregate fair value of the cash Contingent Payment was estimated to be $28.2 million.

The Merger Agreement provides that, in addition to the shares of common stock of the Company (the “Common Stock”) issued to the former Nellix stockholders at the closing of the Merger, the former Nellix stockholders were entitled to receive shares of the Common Stock if the Company’s sales of a Nellix product (the “Nellix Product”) outside of the United States exceeded $10.0 million within a certain time period following the Company’s receipt of CE mark approval for the Nellix Product

15

ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

(the “OUS Milestone”). The aggregate dollar value of the shares of the Common Stock to be issued upon achievement of the OUS Milestone ranged from a high of $24.0 million, or 6.9 million shares, to a low of $10.0 million, or 1.3 million shares. The price per share of the Common Stock to be issued upon achievement of the OUS Milestone was subject to a floor of $3.50 per share and a ceiling of $7.50 per share.

On June 17, 2014, the Company announced its achievement of the OUS Milestone and the issuance of an aggregate of 2.7 million unregistered shares of the Common Stock (the “OUS Milestone Shares”), plus an amount of cash in lieu of fractional shares, to the former Nellix stockholders. The Company offered and sold the OUS Milestone Shares in reliance upon exemptions from registration pursuant to Section 4(2) under the Securities Act of 1933, as amended (the “Securities Act”). The former Nellix stockholders previously gave representations to the Company regarding their investment intent, experience, financial sophistication, access to information regarding the Company and certain other matters to support the Company’s reasonable belief that it could rely upon the foregoing exemptions from registration pursuant to Section 4(2) of the Securities Act. No underwriting discounts or commissions were or will be paid in conjunction with the issuance of the OUS Milestone Shares. The Company previously filed a Registration Statement on Form S-3 (Registration No. 333-171639) (the “Form S-3”) for the purpose of registering for resale shares of the Common Stock issued or issuable pursuant to the Merger Agreement, including the OUS Milestone Shares. The Securities and Exchange Commission declared the Form S-3 effective on January 18, 2011.

In addition, if the Company receives approval from the FDA to sell the Nellix Product in the United States (the “PMA Milestone”), the Company will issue additional shares of the Common Stock to the former stockholders of Nellix. The dollar value of the shares of the Common Stock to be issued upon achievement of the PMA Milestone will be equal to $15.0 million (less the dollar value of certain cash payments and other deductions). The price per share of the shares of the Common Stock to be issued upon achievement of the PMA Milestone is subject to a stock price floor of $4.50 per share, but not subject to a stock price ceiling.

As of September 30, 2015 the Company's stock price last closed at $12.26 per share. Thus, had the PMA Milestone been achieved on September 30, 2015 the Contingent Payment would have comprised 1.1 million shares (based on the 30-day average closing stock price ending 5 days prior to the announcement), representing a value of $14.0 million.

The value of the Contingent Payment is derived using a discounted income approach model, with a range of probabilities and assumptions related to the timing and likelihood of achievement of the PMA Milestone (which include Level 3 inputs - see Note 3(e) and the Company's stock price (Level 1 input) as of the balance sheet date). These varying probabilities and assumptions and changes in the Company's stock price have required fair value adjustments of the Contingent Payment in periods subsequent to the Nellix Closing Date.

The Contingent Payment fair value will continue to be evaluated on a quarterly basis until milestone achievement occurs, or until the expiration of the "earn-out period," as defined within the Nellix purchase agreement. Adjustments to the fair value of the Contingent Payment are recognized within other income (expense) in the Condensed Consolidated Statements of Operations and Comprehensive Loss.

	Fair Value of Contingently Issuable Common Stock
December 31, 2014	$	14,600
Fair Value Adjustment of Contingent Payment for the nine months ended September 30, 2015	200
September 30, 2015	$	14,800

10. Income Tax Expense

The Company applied an estimated annual effective tax rate (“ETR”) approach for calculating a tax provision for interim periods. The Company recorded a provision for income taxes of $22 thousand and $0.2 million for the three and nine months endedSeptember 30, 2015, respectively. The Company's ETR was (0.2)% and (0.5)% for the three and nine months endedSeptember 30, 2015, respectively.  The Company's ETR for the three and nine months endedSeptember 30, 2015 differs from the U.S. federal statutory tax rate of 34% primarily as a result of nondeductible expenses (including the Nellix Contingent Payment), state income taxes, foreign income taxes, and the impact of a full valuation allowance on its deferred tax assets.

The Company has evaluated the available evidence supporting the realization of its deferred tax assets, including the amount and timing of future taxable income, and has determined that it is more likely than not that its net deferred tax assets will not be

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ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

realized in the U.S. and certain foreign jurisdictions. Due to uncertainties surrounding the realization of the deferred tax assets, the Company maintains a full valuation allowance against substantially all deferred tax assets. If/when the Company determines that it will be able to realize some portion or all of its deferred tax assets, an adjustment to its valuation allowance on its deferred tax assets would have the effect of increasing net income in the period(s) such determination is made.

11. Subsequent Events

TriVascular Merger

On October 26, 2015, the Company entered into an agreement and plan of merger (the “Merger Agreement”), with TriVascular Technologies, Inc. (“TriVascular”) under which the Company agreed to acquire all of TriVascular’s outstanding capital stock through a merger of a direct wholly-owned subsidiary of the Company (“Merger Sub”) with and into TriVascular (the “TriVascular Merger”). TriVascular will survive the TriVascular Merger and become a wholly-owned subsidiary of the Company.

Under the terms and conditions of the Merger Agreement, at the effective time of the TriVascular Merger, all outstanding shares of capital stock of TriVascular will be cancelled and converted into the right to receive merger consideration with a value, based on the closing price of the Company’s common stock on October 23, 2015, equal to up to approximately $211 million at closing, subject to certain adjustments specified in the Merger Agreement (the “Merger Consideration”). Approximately $187 million of the Merger Consideration payable to TriVascular stockholders will be payable in shares of the Company’s common stock issued at closing. This represents the value of 19.999% of the Company’s common stock as of October 23, 2015. Subject to certain adjustments specified in the Merger Agreement, up to the remaining approximately $24 million of the Merger Consideration will be payable in cash at closing.

The Merger Agreement includes customary representations, warranties and covenants of the Company, TriVascular and Merger Sub. The Merger Agreement contains customary closing conditions, including the requisite consent to the adoption of the Merger Agreement by TriVascular’s stockholders and the expiration or termination of the waiting period (and any extension thereof) under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The consummation of the TriVascular Merger is not subject to a financing condition.

The Merger Agreement also includes customary termination provisions for both TriVascular and the Company, subject, in certain circumstances, to the payment by TriVascular or the Company of a termination fee of 3.0% or 4.5%, respectively, of the aggregate purchase price. TriVascular must pay the Company the 3.0% termination fee following a change of recommendation by the board of directors of TriVascular or if TriVascular terminates the Merger Agreement to enter into an agreement with respect to a proposal from a third party that the board of directors of TriVascular has determined in good faith in the exercise of its fiduciary duties is superior to the Company’s, in each case, as is described in further detail in the Merger Agreement. The Company must pay TriVascular the 4.5% termination fee if the Company is unable to obtain antitrust approval of the merger.

3.25% Convertible Senior Notes

On October 27, 2015, the Company entered into an underwriting agreement with respect to the offer and sale of $110 million aggregate principal amount of 3.25% Convertible Senior Notes due 2020 (the “3.25% Convertible Senior Notes”). The 3.25% Convertible Senior Notes bear interest at a rate of 3.25% per year, payable semi-annually on May 1 and November 1 of each year, commencing May 1, 2016. The 3.25% Convertible Senior Notes will mature on November 1, 2020, unless earlier purchased, redeemed or converted in accordance with the terms of the 3.25% Convertible Senior Notes. The indenture governing 3.25% Convertible Senior Notes will contain customary terms and covenants and events of default. The initial conversion rate of the 3.25% Convertible Senior Notes is 89.4314 shares of the Company’s common stock per $1,000 principal amount of 3.25% Convertible Senior Notes (which is equivalent to an initial conversion price of approximately $11.18 per share). The conversion rate is subject to adjustment upon the occurrence of certain specified events. Prior to August 1, 2020, the 3.25% Convertible Senior Notes will be convertible only upon the occurrence of certain events and during certain periods, and thereafter, at any time until the second scheduled trading day immediately preceding the maturity date. On or after November 1, 2018, the Company may redeem for cash all or any portion of the 3.25% Convertible Senior Notes, at the Company’s option, but only if the closing sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period ending on, and including, the second trading day immediately preceding the date on which the Company provide notice of redemption, exceeds 130% of the conversion price on each applicable trading day. The redemption price will

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ENDOLOGIX, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(all tabular amounts presented in thousands, except per share, per unit, and number of years)

(Unaudited)

equal 100% of the principal amount of the 3.25% Convertible Senior Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date.

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Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Cautionary Note Concerning Forward-Looking Statements

In addition to historical information, this Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). These forward looking statements are intended to qualify for the safe harbor established by the Private Securities Litigation Reform Act of 1995. You can identify forward-looking statements by the use of forward-looking terminology such as “anticipates,” “believes,” “can,” “continue,” “could,” “estimates,” “expects,” “intends,” “may,” “plans,” “potential,” “predicts,” “should” or “will” or the negative of these terms or other comparable terminology, or by discussions of strategies, opportunities, plans or intentions. In addition, any statements that refer to projections of our future financial performance, trends in our businesses, or other characterizations of future events or circumstances are forward-looking statements. We have based these forward-looking statements largely on our current expectations based on information currently available to us and projections about future events and trends affecting the financial condition of our business. Although we do not make forward-looking statements unless we believe we have a reasonable basis for doing so, we cannot guarantee their accuracy. These forward-looking statements are subject to risks, uncertainties and other factors that could cause actual results and the timing of certain events to differ materially from future results expressed or implied by such forward-looking statements. Actual results could differ materially from those projected in forward-looking statements as a result of the following factors, among others:

• continued market acceptance of our products;

• quality problems with our products;

• consolidation in the health care industry;

• the success of our clinical trials relating to products under development;

• our ability to maintain strong relationships with certain key physicians;

• continued growth in the number of patients qualifying for treatment of abdominal aortic aneurysms through our products;

• our ability to effectively compete with the products offered by our competitors;

• the level and availability of third party payor reimbursement for our products;

• our ability to successfully commercialize products which incorporate the technology obtained in our acquisition of Nellix, Inc. (“Nellix”);     

• our ability to effectively develop new or complementary technologies;

• our ability to manufacture our endovascular systems to meet demand;

• changes to our international operations including currency exchange rate fluctuations;

• our ability to effectively manage our business and keep pace with our anticipated growth;

• our ability to develop and retain a direct sales force in the United States and select European countries;

• the nature of and any changes to legislative, regulatory and other legal requirements that apply to us, our products, our suppliers and our competitors;     

• the timing of and our ability to obtain and maintain any required regulatory clearances and approvals;

• our ability to protect our intellectual property rights and proprietary technologies;

• our ability to operate our business without infringing the intellectual property rights and proprietary technology of third parties;

• product liability claims and litigation expenses;

• reputational damage to our products caused by mis-use or off-label use or government or voluntary product recalls;

• our utilization of a single source supplier for specialized components of our product lines;

• our ability to attract, retain, and motivate qualified personnel;

• our ability to make current and future acquisitions and successfully integrate any such future-acquired businesses;

• our substantial level of indebtedness could adversely affect our financial condition and prevent us from fulfilling our obligations under the notes;

• our ability to maintain adequate liquidity to fund our operational needs and research and developments expenses; and

• general macroeconomic and world-wide business conditions.

Our actual results, performance or achievements may differ materially from any future results, performance or achievements expressed or implied from such forward-looking statements. Important factors that could cause our actual results, performance or achievements to differ materially from our expectations are disclosed in our Annual Report on Form 10-K for the year ended December 31, 2014, filed with the SEC on March 2, 2015, including but not limited to those factors discussed in “Management's Discussion and Analysis of Financial Condition and Results of Operations,” “Risk Factors,” “Consolidated Financial Statements” and “Notes to Consolidated Financial Statements.” All subsequent written and oral forward-looking statements attributable to us or by persons acting on our behalf are expressly qualified in their entirety by these cautionary statements. We expressly disclaim any

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intent or obligation to update information contained in any forward-looking statement after the date thereof to conform such information to actual results or to changes in our opinions or expectations. 

Our forward-looking statements speak only as of the date each such statement is made. We expressly disclaim any intent or obligation to update any forward-looking statements after the date hereof to conform such statements to actual results or to changes in our opinions or expectations, except as required by applicable law or the rules and regulations of the SEC and The NASDAQ Stock Market, LLC.

Overview

Our Business

Our corporate headquarters and manufacturing facility is located in Irvine, California. We develop, manufacture, market, and sell innovative medical devices for the treatment of aortic disorders. Our principal products are intended for the treatment of abdominal aortic aneurysms ("AAA"). Our AAA products are built on one of two platforms: (a) traditional minimally-invasive endovascular repair ("EVAR") or (b) endovascular sealing (“EVAS”), our innovative solution for sealing the aneurysm sac while maintaining blood flow through two blood flow lumens.

We sell our products through our direct U.S. and European sales forces and third-party international distributors and agents in other parts of the world.

See Item 1. of our Annual Report on Form 10-K for the year ended December 31, 2014, entitled "Business," for a discussion of:

• Market Overview and Opportunity

• Our Products

• Manufacturing and Supply

• Marketing and Sales

• Competition

• Product Developments and Clinical Trials

Endologix®, AFX® and Nellix® are registered trademarks of Endologix, Inc., and Intuitrak™, VELA™ and the respective product logos are trademarks of Endologix, Inc.

Recent Highlights of Our Product Development Initiatives, Clinical Trials and Regulatory Approvals

Nellix

On December 10, 2010, we completed our acquisition of Nellix. Using the technology we acquired in the Nellix acquisition, we developed the Nellix EVAS System, a next-generation device, to treat infrarenal AAA. We have the following trials in process to build independent and collective clinical and economic evidence of clinical safety and effectiveness:

• EVAS FORWARD IDE - Pivotal clinical trial to evaluate the safety and effectiveness of the Nellix EVAS System. The study is a prospective single arm registry which enrolled 179 patients at centers in the U.S. and Europe. In November 2014, we completed enrollment in the EVAS FORWARD IDE. The patients in this study will be followed for one-year, after which we will submit the final module of the PMA to the FDA. FDA approval is anticipated by the end of 2016.

• EVAS FORWARD Global Registry - This study is designed to provide real world clinical results to demonstrate the effectiveness and broad applicability of the Nellix EVAS System. This registry is designed to include 300 patients enrolled in up to 30 international centers. The first patient in the registry was treated in October 2013. The study utilizes an independent core lab and includes follow-up to five years. In September 2014, we announced completion of patient enrollment in the Nellix EVAS FORWARD Global Registry.

AFX

In February 2014, we launched a new proximal extension in the U.S., VELA, designed to be used in conjunction with our AFX bifurcated device. VELA features a circumferential graft line marker and controlled delivery system that enable predictable deployment and final positional adjustments. We began a commercial introduction of VELA in Europe in January 2015.

In September 2014, we announced a new clinical study called LEOPARD (Looking at EVAR Outcomes by Primary Analysis of Randomized Data). The study will provide a real-world comparison of the AFX system versus other commercially available EVAR devices. The LEOPARD study is designed to randomize and enroll up to 800 patients at 80 leading centers throughout the United States and commenced in the first quarter of 2015. The centers will be a mix of our current and new customers, with each investigator selecting one competitive device to randomize against AFX. The LEOPARD study is being led by an independent

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steering committee of leading physicians who will be involved with the study and responsible for presenting the results over the five-year follow-up period.

Characteristics of Our Revenue and Expenses

Revenue

We derive revenue from sales of our EVAR and EVAS products (including extensions and accessories) to hospitals upon completion of AAA repair procedures, or from sales to distributors upon title transfer (which is typically at shipment), provided our other revenue recognition criteria have been met.

Cost of Goods Sold

Cost of goods sold includes compensation (including stock-based compensation) and benefits of production personnel and production support personnel. Cost of goods sold also includes depreciation expense for production equipment, production materials and supplies expense, allocated facilities-related expenses and certain direct costs such as shipping.

Research and Development

Research and development expenses consist of compensation (including stock-based compensation) and benefits for research and development personnel, materials and supplies, research and development consultants, outsourced and licensed research and development costs and allocated facilities-related costs. Our research and development activities primarily relate to the development and testing of new devices and methods to treat aortic disorders.

Clinical and Regulatory

Clinical and regulatory expenses consist of compensation (including stock-based compensation) and benefits for clinical and regulatory personnel, regulatory and clinical payments related to studies, regulatory costs related to registration and approval activities and allocated facilities-related costs. Our clinical and regulatory activities primarily relate to gaining regulatory approval for the commercialization of our devices.

Marketing and Sales

Marketing and Sales expenses primarily consist of compensation (including stock-based compensation) and benefits for our sales force, clinical specialist, internal sales support functions and marketing personnel. It also includes costs attributable to marketing our products to our customers and prospective customers.

General and Administrative

General and administrative expenses primarily include compensation (including stock-based compensation) and benefits for personnel that support our general operations such as information technology, executive management, financial accounting, and human resources. General and administrative expenses also include bad debt expense, patent and legal fees, financial audit fees, insurance, recruiting fees, other professional services, the federal Medical Device Excise Tax and allocated facilities-related expenses.

Critical Accounting Policies and Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, and the disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the periods presented. While management believes these estimates are reasonable and consistent, they are by their very nature, estimates of amounts that will depend on future events. Accordingly, actual results could differ from these estimates. Our Audit Committee periodically reviews our significant accounting policies.

For a description of our critical accounting policies and estimates, please refer to the “Critical Accounting Policies and Estimates” section in Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations”, in our Annual Report on Form 10-K for the year ended December 31, 2014. There have been no material changes in any of our critical accounting policies and estimates during the three and nine months ended September 30, 2015.

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Results of Operations

Operations Overview - Three and Nine Months Ended September 30, 2015 versus 2014

The following table presents our results of continuing operations and the related percentage of the period's revenue (in thousands):

	Three Months Ended September 30,								Nine Months Ended September 30,
	2015				2014				2015				2014
Revenue	$	38,231		100.0%	$	37,150		100.0%	$	114,380		100.0%	$	108,741		100.0%
Cost of goods sold	11,195			29.3%	13,573			36.5%	36,306			31.7%	32,362			29.8%
Gross profit	27,036			70.7%	23,577			63.5%	78,074			68.3%	76,379			70.2%
Operating expenses:
Research and development	5,459			14.3%	5,313			14.3%	17,683			15.5%	13,876			12.8%
Clinical and regulatory affairs	3,956			10.3%	2,482			6.7%	11,003			9.6%	7,404			6.8%
Marketing and sales	19,662			51.4%	18,438			49.6%	59,103			51.7%	53,748			49.4%
General and administrative	7,293			19.1%	6,271			16.9%	21,432			18.7%	19,366			17.8%
Total operating expenses	36,370			95.1%	32,504			87.5%	109,221			95.5%	94,394			86.8%
Loss from operations	(9,334		)	(24.4)%	(8,927		)	(24.0)%	(31,147		)	(27.2)%	(18,015		)	(16.6)%
Total other income (expense)	(1,561		)	(4.1)%	(5,357		)	(14.4)%	(3,809		)	(3.3)%	169			0.2%
Net loss before income tax (expense) benefit	(10,895		)	(28.5)%	(14,284		)	(38.4)%	(34,956		)	(30.5)%	(17,846		)	(16.4)%
Income tax (expense) benefit	(22		)	(0.1)%	346			0.9%	(175		)	(0.2)%	210			0.2%
Net loss	$	(10,917	)	(28.6)%	$	(13,938	)	(37.5)%	$	(35,131	)	(30.7)%	$	(17,636	)	(16.2)%

Comparison of the Three Months Ended September 30, 2015 versus 2014

Revenue

	Three Months Ended September 30,
	2015		2014		Variance		Percent Change
	(in thousands)
Revenue	$	38,231	$	37,150	$	1,081	2.9%

Our 2.9% revenue increase of $1.1 million over the prior year period primarily resulted from:

(i) a $0.9 million increase in European sales volume due to strong direct sales growth related to Nellix offsetting unfavorable foreign currency; and

(ii) a $0.4 million increase in ROW sales volume driven by our Asia/Pacific markets; and

(iii) a $0.2 million decrease in U.S. sales due to temporary delay in patient enrollment in the Nellix continued access protocol, partially offset by an increase in procedures due to continued physician adoption of AFX.

Our 2015 revenue includes an unfavorable foreign currency impact of $1.4 million when compared to 2014, representing revenue growth of 6.8% on a constant currency basis.

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Cost of Goods Sold, Gross Profit, and Gross Margin

	Three Months Ended September 30,
	2015			2014			Variance			Percent Change
	(in thousands)
Cost of goods sold	$	11,195		$	13,573		$	(2,378	)	(17.5	)%
Gross profit	27,036			23,577			3,459			14.7	%
Gross margin percentage (gross profit as a percent of revenue)	70.7		%	63.5		%

Gross margin for the three months endedSeptember 30, 2015 increased to 70.7% from 63.5% for the three months endedSeptember 30, 2014. The decrease in cost of goods sold, and corresponding increase to the gross margin percentage, is largely due to the inventory write-off of $4.7 million in the third quarter of 2014 for product inventory that was replaced with our new DURAPLYTM ePTFE Graft Material for the AFX® Endovascular AAA System.

Operating Expenses

	Three Months Ended September 30,
	2015		2014		Variance		Percent Change
	(in thousands)
Research and development	$	5,459	$	5,313	$	146	2.7%
Clinical and regulatory affairs	3,956		2,482		1,474		59.4%
Marketing and sales	19,662		18,438		1,224		6.6%
General and administrative	7,293		6,271		1,022		16.3%

Research and Development. The $0.1 million increase in research and development expenses was attributable to increased product development investments related to Nellix and AFX.

Clinical and Regulatory Affairs. The $1.5 million increase in clinical and regulatory affairs expenses is due to increased regulatory fees and patient and outside services costs to support ongoing clinical activities, such as EVAS FORWARD IDE and LEOPARD.

Marketing and Sales. The $1.2 million increase in marketing and sales expenses for the three months endedSeptember 30, 2015, as compared to the prior year period, was primarily related to increased investments in our European sales force and global marketing activities. Our 2015 marketing and sales expenses include a favorable foreign currency impact of $0.6 million when compared to 2014.

General and Administrative. The $1.0 million increase in general and administrative expenses is primarily attributable to an increase in professional fees, litigation costs and stock-based compensation.

Other income (expense), net

	Three Months Ended September 30,
	2015			2014			Variance		Percent Change
	(in thousands)
Other income (expense), net	$	(1,561	)	$	(5,357	)	$	3,796	(70.9)%

Other Income (Expense), Net. Other expense for the three months endedSeptember 30, 2015 includes interest expense associated with our convertible note of $1.5 million.Other expense for the three months endedSeptember 30, 2014 includes $4.2 million net currency remeasurement of certain assets and liabilities that were not transacted in the functional currency of the corresponding operating entity, along with interest expense associated with our convertible notes of $1.4 million.

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Provision for Income Taxes

	Three Months Ended September 30,
	2015			2014		Variance			Percent Change
	(in thousands)
Income tax (expense) benefit	$	(22	)	$	346	$	(368	)	>(100%)

Our income tax expense was $22 thousand and our effective tax rate was (0.2)% for the three months endedSeptember 30, 2015 due to our tax positions in various jurisdictions. During the three months endedSeptember 30, 2015 and 2014, we had operating legal entities in the U.S., Italy, New Zealand, Poland and the Netherlands (including registered sales branches in certain countries in Europe).

Comparison of the Nine Months Ended September 30, 2015 versus 2014

Revenue

	Nine Months Ended September 30,
	2015		2014		Variance		Percent Change
	(in thousands)
Revenue	$	114,380	$	108,741	$	5,639	5.2%

Our 5.2% revenue increase of $5.6 million over the prior year period primarily resulted from:

(i) a $2.3 million increase in sales volume to our ROW markets; and

(ii) a $1.8 million increase in U.S. sales procedures due to continued physician adoption of AFX; and

(iii) a $1.6 million increase in European sales volume due to strong direct sales growth related to Nellix offsetting unfavorable foreign currency.

Our 2015 revenue includes an unfavorable foreign currency impact of $4.6 million when compared to 2014, representing revenue growth of 9.4% on a constant currency basis.

Cost of Goods Sold, Gross Profit, and Gross Margin

	Nine Months Ended September,
	2015			2014			Variance		Percent Change
	(in thousands)
Cost of goods sold	$	36,306		$	32,362		$	3,944	12.2	%
Gross profit	78,074			76,379			1,695		2.2	%
Gross margin percentage (gross profit as a percent of revenue)	68.3		%	70.2		%

The $3.9 million increase in cost of goods sold was primarily driven by our revenue increase of $5.6 million.

Gross margin for the nine months endedSeptember 30, 2015 decreased to 68.3% from 70.2% for the nine months endedSeptember 30, 2014. The decrease in gross margin is driven by product mix with a greater proportion of sales from Nellix which has a higher cost to produce compared to AFX and region mix as sales outside the U.S. increased.

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Operating Expenses

	Nine Months Ended September 30,
	2015		2014		Variance		Percent Change
	(in thousands)
Research and development	$	17,683	$	13,876	$	3,807	27.4%
Clinical and regulatory affairs	11,003		7,404		3,599		48.6%
Marketing and sales	59,103		53,748		5,355		10.0%
General and administrative	21,432		19,366		2,066		10.7%

Research and Development. The $3.8 million increase in research and development expenses was primarily attributable to increased product development investments related to Nellix and AFX.

Clinical and Regulatory Affairs. The $3.6 million increase in clinical and regulatory affairs expenses is due to increased regulatory fees and patient and outside services costs to support ongoing clinical activities, such as EVAS FORWARD IDE and LEOPARD.

Marketing and Sales. The $5.4 million increase in marketing and sales expenses for the nine months endedSeptember 30, 2015, as compared to the prior year period, was primarily related to increased investments in our European sales force and global marketing activities. Our 2015 marketing and sales expenses include a favorable foreign currency impact of $2.6 million when compared to 2014.

General and Administrative. The $2.1 million increase in general and administrative expenses is primarily attributable to increases in professional fees, litigation costs, stock-based compensation and investment in information technology projects.

Other income (expense), net

	Nine Months Ended September 30,
	2015			2014		Variance		Percent Change
	(in thousands)
Other income (expense), net	$	(3,809	)	$	169	(3,978	)	>100%

Other Income (Expense), Net. Other expense for the nine months endedSeptember 30, 2015 includes interest expense associated with our convertible note of $4.5 million, foreign currency gains of $0.6 million and a non-cash expense of $0.2 million related to the fair value of the Nellix contingent consideration. Other income for the nine months endedSeptember 30, 2014 includes $8.2 million, which reflects a decrease in the fair value of the Nellix contingent consideration, which was related to the decrease in our stock price during the nine months ended September 30, 2014. This was offset by $4.0 million net currency remeasurement of certain assets and liabilities that were not transacted in the functional currency of the corresponding operating entity, along with interest expense associated with our convertible notes of $4.3 million.

Provision for Income Taxes

	Nine Months Ended September 30,
	2015			2014		Variance			Percent Change
	(in thousands)
Income tax (expense) benefit	$	(175	)	$	210	$	(385	)	>(100%)

Our income tax expense was $0.2 million and our effective tax rate was (0.5)% for the nine months ended September 30, 2015 due to our tax positions in various jurisdictions. During the nine months endedSeptember 30, 2015 and 2014, we had operating legal entities in the U.S., Italy, New Zealand, Poland and the Netherlands (including registered sales branches in certain countries in Europe).

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Liquidity and Capital Resources

The chart provided below summarizes selected liquidity data and metrics as of September 30, 2015, December 31, 2014, and September 30, 2014:

	September 30, 2015		December 31, 2014		September 30, 2014
	(in thousands, except financial metrics data)
Cash and cash equivalents	$	35,404	$	26,798	$	27,537
Marketable securities	$	32,891	$	59,871	$	72,962
Accounts receivable, net	$	27,158	$	26,113	$	25,702
Total current assets	$	132,292	$	147,767	$	158,389
Total current liabilities	$	32,967	$	29,624	$	29,252
Working capital surplus (a)	$	99,325	$	118,143	$	129,137
Current ratio (b)	4.0		5.0		5.4
Days sales outstanding ("DSO") (c)	65		62		64
Inventory turnover (d)	1.4		1.6		1.9

(a) total current assets minus total current liabilities as of the corresponding balance sheet date.

(b) total current assets divided by total current liabilities as of the corresponding balance sheet date.

(c) net accounts receivable at period end dividedby revenue for the current period multiplied by the number of days in the period.

(d) cost of goods sold divided by the average inventory balance for the corresponding period.

Operating Activities

Cash used in operating activities was $18.3 million for the nine months endedSeptember 30, 2015 as compared to cash used in operating activities of $15.3 million in the prior year period. The increase in cash usage was primarily due to (i) funding the increased net loss of $35.1 million, (ii) an increase in accounts receivable and other receivables of $1.3 million and (iii) an increase in inventory of $1.9 million. These increases in cash usage were partially offset by non-cash stock-based compensation of $7.2 million, depreciation and amortization of $4.6 million, an increase in accounts payable of $4.7 million and non-cash accretion of interest on convertible note of $2.6 million. Cash used in operating activities for the nine months endedSeptember 30, 2014 was $15.3 million and consisted of (i) a change in the fair value of the Nellix contingent consideration of $8.2 million and (ii) inventory purchases of $8.5 million, offset by an increase in accounts payable of $2.2 million.

During the nine months endedSeptember 30, 2015 and 2014, our cash collections from customers totaled $114.4 million and $109.0 million, respectively, representing 100.0% and 100.2% of reported revenue for the same periods.

Investing Activities

Cash provided by investing activities for the nine months endedSeptember 30, 2015 was $23.3 million, as compared to cash used in investing activities of $52.5 million in the prior year period. For the nine months endedSeptember 30, 2015, cash provided by investing activities consisted of $79.3 million in maturities of marketable securities, offset by $3.6 million used for machinery and equipment purchases and $52.4 million used to purchase marketable securities. For the nine months endedSeptember 30, 2014, cash used in investing was $52.5 million and consisted of $9.9 million used for machinery and equipment purchases and $107.5 million used to purchase marketable debt securities; offset by $64.8 million in maturities of marketable securities.

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Financing Activities

Cash provided by financing activities was $4.1 million for the nine months endedSeptember 30, 2015, as compared to cash provided by financing activities $0.7 million in the prior year period. For the nine months endedSeptember 30, 2015, cash provided by financing activities consisted of $4.4 million from the exercise of stock options and proceeds from sale of common stock under our employee stock purchase plan, offset by $0.3 million used to pay minimum tax withholdings on behalf of employees for restricted stock units vested during the period. For the nine months endedSeptember 30, 2014, cash provided by financing activities consisted of proceeds of $3.0 million from the exercise of stock options and proceeds from our employee stock purchase plan, offset by $2.3 million used to pay minimum tax withholdings on behalf of employees for restricted stock units vested during the period.

Credit Arrangements

See Note 6 and Note 11 of the Notes to the Condensed Consolidated Financial Statements.

Future Capital Requirements

We believe that the future growth of our business will depend upon our ability to successfully develop new technologies for the treatment of aortic disorders and successfully bring these technologies to market. We expect to incur significant expenditures in completing product development and clinical trials for the Nellix System.

The timing and amount of our future capital requirements will depend on many factors, including:

• the need for working capital to support our sales growth;

• the need for additional capital to fund future development programs;

• the need for additional capital to fund our sales force expansion;

• the need for additional capital to fund strategic acquisitions;

• our requirements for additional facility space or manufacturing capacity;

• our requirements for additional information technology infrastructure and systems; and

• adverse outcomes from potential litigation and the cost to defend such litigation.

We believe that our world-wide cash resources are adequate to operate our business. We presently have several operating subsidiaries and branches outside of the U.S. As of September 30, 2015, these subsidiaries and branches hold an aggregate $8.0 million in foreign bank accounts to fund their local operations. A portion of these balances relate to undistributed earnings, and are deemed by management to be permanently reinvested in the corresponding country in which our subsidiary operates. Management has no present or planned intention to repatriate foreign earnings into the U.S. However, in the event that we required additional funds in the U.S. and had to repatriate any foreign earnings to meet those needs, we would then need to accrue, and ultimately pay, incremental income tax expenses on such “deemed dividend,” unless we then had sufficient net operating losses to offset this potential tax liability.

In the event we require additional financing in the future, it may not be available on commercially reasonable terms, if at all. Even if we are able to obtain financing, it may cause substantial dilution (in the case of an equity financing), or may contain burdensome restrictions on the operation of our business (in the case of debt financing). If we are not able to obtain required financing, we may need to curtail our operations and/or our planned product development.

Contractual Obligations

Contractual obligation payments by year with initial terms in excess of one year were as follows as of September 30, 2015 (in thousands):

	Payments due by period
Contractual Obligations	Total		Remainder of 2015		2016		2017		2018		2019		2020		2021 and thereafter
Long-term debt obligations	$	86,250	$	—	$	—	$	—	$	86,250	$	—	$	—	$	—
Interest on debt obligations	6,793		970		1,941		1,941		1,941		$	—	$	—	$	—
Operating lease obligations	35,669		589		2,468		2,450		2,385		2,389		2,504		22,884
Total	$	128,712	$	1,559	$	4,409	$	4,391	$	90,576	$	2,389	$	2,504	$	22,884

Refer to Note 6 of the Notes to the Condensed Consolidated Financial Statements for a discussion of long-term debt obligations and Note 8 of the Notes to the Condensed Consolidated Financial Statements for a discussion of operating lease obligations.

27

Off-Balance Sheet Arrangements

We have no off-balance sheet arrangements (except for operating leases) that provide financing, liquidity, market or credit risk support, or involve derivatives. In addition, we have no arrangements that may expose us to liability that are not expressly reflected in the accompanying Consolidated Financial Statements.

As of September 30, 2015, we did not have any relationships with unconsolidated entities or financial partnerships, often referred to as "structured finance" or "special purpose entities," established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. As such, we are not subject to any material financing, liquidity, market or credit risk that could arise if we had engaged in such relationships.

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

We do not believe that we currently have material exposure to interest rate or foreign currency transaction risks.

Interest Rate and Market Risk. We have investments in U.S. Government and agency securities, corporate bonds and other debt securities. As a result, we are exposed to potential loss from market risks that may occur as a result of changes in interest rates, changes in credit quality of the issuer or otherwise.

We generally place our marketable security investments in high quality credit instruments, as specified in our investment policy guidelines. A hypothetical 100 basis point decrease in interest rates would result in an approximate $52 thousand increase in the fair value of our investments as of September 30, 2015. We believe, however, that the conservative nature of our investments mitigates our interest rate exposure, and our investment policy limits the amount of our credit exposure to any one issue, issuer (with the exception of U.S. agency obligations) and type of instrument. We do not expect any material loss from our marketable security investments and therefore believe that our potential interest rate exposure is limited. We intend to hold the majority of our investments to maturity, in accordance with our business plans.

We do not use derivative financial instruments in our investment portfolio. We are averse to principal loss and try to ensure the safety and preservation of our invested funds by limiting default risk, market risk, and reinvestment risk. We attempt to mitigate default risk by investing in only high credit quality securities and by positioning our portfolio to appropriately respond to a significant reduction in the credit rating of any investment issuer or guarantor.

We are exposed to market risk for changes in interest rates on the BOA Credit Facility. All outstanding amounts under the BOA Credit Facility bear interest at a variable rate equal to LIBOR, plus 2.50%, which is payable on a monthly basis. As of September 30, 2015, we had no amounts outstanding under the BOA Credit Facility. If we draw down the BOA Credit Facility, we may be exposed to market risk due to changes in the rate at which interest accrues.

Our Senior Notes bear fixed interest rates, and therefore, would not be subject to interest rate risk. The Capped Call transactions are derivative instruments that qualify for classification within stockholders’ equity because they meet an exemption from mark-to-market derivative accounting. The settlement amounts for the capped call transactions are each determined based upon the difference between a strike price and a traded price of the Company’s common stock.

Foreign Currency Transaction Risk. While a majority of our business is denominated in the U.S. dollar, a portion of our revenue and expenses are denominated in foreign currencies. Fluctuations in the rate of exchange between the U.S. dollar and the Euro or the British Pound Sterling may affect our results of operations and the period-to-period comparisons of our operating results. Foreign currency transaction gains and losses are caused by transactions denominated in a currency other than the functional currency and must be remeasured at each balance sheet date or upon settlement. Foreign currency transaction realized and unrealized gains and losses resulted in approximately $0.1 million and $(0.6) million of losses and gains during the three and nine months endedSeptember 30, 2015, respectively, primarily related to intercompany payables and receivables associated with our European operations. We expect to reduce our exposure through future settlements.

Item 4. CONTROLS AND PROCEDURES.

We carried out an evaluation, under the supervision and with the participation of our management, including our chief executive officer and chief financial officer, of the effectiveness of our disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) as of the end of the period covered by this report. Based on that evaluation, our chief executive officer and chief financial officer have concluded that our disclosure controls and procedures, as of the end of the period covered by this report, were effective to ensure that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and to ensure that

28

information required to be disclosed by us in the reports that we file or submit under the Exchange Act is accumulated and communicated to our management, including our chief executive officer and chief financial officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

There has been no change in our internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) during the third quarter of 2015 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

29

Part II. Other Information

Item 1. LEGAL PROCEEDINGS.

Refer to Note 8 of the Notes to the Condensed Consolidated Financial Statements for discussion of legal proceedings.

Item 6. EXHIBIT INDEX.

The following exhibits are filed or furnished herewith:

Exhibit 31.1		Certification of Chief Executive Officer Pursuant to Rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934.
Exhibit 31.2		Certification of Chief Financial Officer Pursuant to Rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934.
Exhibit 32.1	(1)	Certification of Chief Executive Officer Pursuant to Rule 13a-14(b)/15d-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350.
Exhibit 32.2	(1)	Certification of Chief Financial Officer Pursuant to Rule 13a-14(b)/15d-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350.
Exhibit 101.INS		XBRL Instance Document
Exhibit 101.SCH		XBRL Taxonomy Extension Schema Document
Exhibit 101.CAL		XBRL Taxonomy Extension Calculation Lin Base Document
Exhibit 101.DEF		XBRL Taxonomy Extension Definition Link Base Document
Exhibit 101.LAB		XBRL Taxonomy Extension Label Link Base Document
Exhibit 101.PRE		XBRL Taxonomy Extension Presentation Link Base Document

(1) Furnished herewith and not “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

30

SIGNATURES

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.

		ENDOLOGIX, INC.
Date:	October 30, 2015	/s/ John McDermott
		Chief Executive Officer and Chairman of the Board (Principal Executive Officer)
Date:	October 30, 2015	/s/ Vaseem Mahboob
		Chief Financial Officer (Principal Financial and Accounting Officer)

31

EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer

I, John McDermott, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Endologix, 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 we 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 reporting purposes in accordance with generally accepted accounting principals;

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 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, 2015	By:	/s/ John McDermott
			John McDermott
			Chief Executive Officer and Chairman of the Board (Principal Executive Officer)

EX-31.2

Exhibit 31.2

Certification of Chief Financial Officer

I, Vaseem Mahboob, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Endologix, 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 we 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 reporting purposes in accordance with generally accepted accounting principals;

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 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, 2015	By:	/s/ Vaseem Mahboob
			Vaseem Mahboob
			Chief Financial Officer (Principal Financial and Accounting Officer)

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer

Pursuant to 18 U.S.C Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

I, John McDermott, certify pursuant to Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350 that:

(1) The Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2015 (the “Quarterly Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 780(d)); and

(2) The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	October 30, 2015	By:	/s/ John McDermott
			John McDermott
			Chief Executive Officer and Chairman of the Board (Principal Executive Officer)

This certification accompanies the Quarterly Report pursuant to Rule 13a-14(b) or Rule 15d-14(b) under the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350 and shall not be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section.

EX-32.2

Exhibit 32.2

Certification of 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, Vaseem Mahboob, certify pursuant to Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350 that:

(1) The Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2015 (the “Quarterly Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 780(d)); and

(2) The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	October 30, 2015	By:	/s/ Vaseem Mahboob
			Vaseem Mahboob
			Chief Financial Officer (Principal Financial and Accounting Officer)

This certification accompanies the Quarterly Report pursuant to Rule 13a-14(b) or Rule 15d-14(b) under the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350 and shall not be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section.

XML

Subsequent Events (Details) - Subsequent Event	Oct. 27, 2015 USD ($) d $ / shares	Oct. 23, 2015 USD ($)
TriVascular Technologies, Inc.
Subsequent Event [Line Items]
Purchase price		$ 211,000,000
Equity interests issued and issuable		$ 187,000,000
Equity interest issued and issuable, percent		19.999%
Cash payments at closing		$ 24,000,000
Acquiree termination fee, percent		3.00%
Acquirer termination fee, percent		4.50%
Convertible Senior Notes Due 2020 | Convertible Debt
Subsequent Event [Line Items]
Debt instrument face amount	$ 110,000,000
Stated interest rate	3.25%
Conversion of convertible securities	89.4314
Convertible conversion price | $ / shares	$ 11.18
Threshold trading days | d	20
Threshold consecutive trading days	30 years
Threshold percentage of stock price trigger	130.00%

XML

Balance Sheet Account Detail (Property and Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 34,242		$ 34,242		$ 37,693
Accumulated depreciation	(10,377)		(10,377)		(11,997)
Property and equipment, net	23,865		23,865		25,696
Depreciation expense	1,200	$ 600	3,400	$ 1,600
Production equipment, molds, and office furniture
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	13,293		13,293		12,943
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	6,267		6,267		6,457
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	14,336		14,336		15,729
Construction in progress (software and related implementation, production equipment, and leasehold improvements)
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 346		$ 346		$ 2,564

XML

Contingently Issuable Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions			3 Months Ended		9 Months Ended
	Jun. 17, 2014	Dec. 10, 2010	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Jun. 16, 2014
Fair Value of Contingently Issuable Common Stock [Roll Forward]
December 31, 2014					$ 14,600
Fair Value Adjustment of Contingent Payment for the nine months ended September 30, 2015			$ 0	$ (200)	200	$ (8,228)
September 30, 2015			$ 14,800		14,800
Nelix Milestones
Business Acquisition [Line Items]
Number of shares contingently issuable		10.2
Estimated fair value of contingent payment		$ 28,200
OUS Milestone
Business Acquisition [Line Items]
Purchase price common shares	2.7
OUS Milestone | Common Stock
Business Acquisition [Line Items]
Contingent consideration, liability, value, low					10,000
Contingent consideration, liability, value, high					$ 24,000
Contingent consideration, liability, shares, high					6.9
Contingent consideration, liability, shares, low					1.3
OUS Milestone | Common Stock | Minimum
Business Acquisition [Line Items]
Share price							$ 3.50
OUS Milestone | Common Stock | Maximum
Business Acquisition [Line Items]
Share price							$ 7.50
PMA Milestone
Business Acquisition [Line Items]
Common shares value		$ 15,000
Number of shares contingently issuable					1.1
Closing stock price			$ 12.26		$ 12.26
Contingent consideration, at fair value hypothetical value			$ 14,000		$ 14,000
PMA Milestone | Minimum
Business Acquisition [Line Items]
Share price		$ 4.5
Nellix
Business Acquisition [Line Items]
Purchase price common shares		3.2
Common shares value		$ 19,400

XML

Stock-Based Compensation

9 Months Ended

Sep. 30, 2015

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

Stock-Based Compensation

Stock-Based Compensation

The Company classifies stock-based compensation expense in the accompanying Condensed Consolidated Statements of Operations and Comprehensive Loss, based on the department to which the recipient belongs. Stock-based compensation expense included in cost of goods sold and operating expenses during the three and nine months endedSeptember 30, 2015 and 2014, was as follows:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2015		2014			2015		2014
Cost of goods sold	$	257	$	240		$	731	$	643
Operating expenses:
Research and development	252		207			737		543
Clinical and regulatory affairs	321		(195		)	749		67
Marketing and sales	888		931			2,476		2,125
General and administrative	832		632			2,476		2,190
Total operating expenses	$	2,293	$	1,575		$	6,438	$	4,925
Total	$	2,550	$	1,815		$	7,169	$	5,568

XML

Balance Sheet Account Detail (Held to Maturity Marketable Securities) (Details) $ in Thousands	Sep. 30, 2015 USD ($) securities	Dec. 31, 2014 USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 32,891	$ 59,871
Gross Unrealized Gain	10	5
Gross Unrealized Loss	(1)	(8)
Fair Value	32,900	59,868
Asset backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	193	3,633
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	193	3,633
Agency bonds
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	4,000
Gross Unrealized Gain	0
Gross Unrealized Loss	0
Fair Value	4,000
Corporate bonds
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,703	15,707
Gross Unrealized Gain	0	0
Gross Unrealized Loss	(1)	(8)
Fair Value	1,702	15,699
Commercial paper
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	10,094	40,531
Gross Unrealized Gain	1	5
Gross Unrealized Loss	0	0
Fair Value	10,095	$ 40,536
Government securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	16,901
Gross Unrealized Gain	9
Gross Unrealized Loss	0
Fair Value	16,910
Corporate debt securities
Schedule of Held-to-maturity Securities [Line Items]
Gross Unrealized Loss	(1)
Fair Value	$ 7,300
Held-to-maturity debt securities held | securities	5

XML

Balance Sheet Account Detail (Amortization) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Balance Sheet Related Disclosures [Abstract]
Amortization expense	$ 400	$ 100	$ 1,200	$ 300
Remainder of 2015	202		202
2016	715		715
2017	1,717		1,717
2018	3,207		3,207
2019	4,397		4,397
2020	5,702		5,702
2021 & Thereafter	23,630		23,630
Total	$ 39,570		$ 39,570

XML

Balance Sheet Account Detail (Fair Value Measurements) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 35,404	$ 26,798
Contingently issuable common stock	14,800	14,600
Quoted prices in active markets for identical assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	35,404	26,798
Contingently issuable common stock	0	0
Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Contingently issuable common stock	0	0
Significant unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Contingently issuable common stock	14,800	14,600
2.25 % Convertible Senior Notes due 2018 | Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long-term debt	$ 77,200	$ 84,500
Convertible Debt | 2.25 % Convertible Senior Notes due 2018 | Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate	2.25%

XML

Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated stock-based compensation expense	$ 2,550	$ 1,815	$ 7,169	$ 5,568
Cost of goods sold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated stock-based compensation expense	257	240	731	643
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated stock-based compensation expense	252	207	737	543
Clinical and regulatory affairs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated stock-based compensation expense	321	(195)	749	67
Marketing and sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated stock-based compensation expense	888	931	2,476	2,125
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated stock-based compensation expense	832	632	2,476	2,190
Total operating expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated stock-based compensation expense	$ 2,293	$ 1,575	$ 6,438	$ 4,925

XML

Balance Sheet Account Detail

9 Months Ended

Sep. 30, 2015

Balance Sheet Related Disclosures [Abstract]

Balance Sheet Account Detail

Balance Sheet Account Detail

(a) Property and Equipment

Property and equipment consisted of the following:

	September 30, 2015			December 31, 2014
Production equipment, molds, and office furniture	$	13,293		$	12,943
Computer hardware and software	6,267			6,457
Leasehold improvements	14,336			15,729
Construction in progress (software and related implementation, production equipment, and leasehold improvements)	346			2,564
Property and equipment, at cost	$	34,242		$	37,693
Accumulated depreciation	(10,377		)	(11,997		)
Property and equipment, net	$	23,865		$	25,696

Depreciation expense for property and equipment for the three months endedSeptember 30, 2015 and 2014 was $1.2 million and $0.6 million, respectively. For the nine months endedSeptember 30, 2015 and 2014 depreciation expense for property and equipment was $3.4 million and $1.6 million, respectively.

(b) Inventories

Inventories consisted of the following:

	September 30, 2015		December 31, 2014
Raw materials	$	6,919	$	6,728
Work-in-process	7,329		5,946
Finished goods	19,174		18,651
Total Inventories	$	33,422	$	31,325

(c) Goodwill and Intangible Assets

The following table presents goodwill, indefinite lived intangible assets, finite lived intangible assets and related accumulated amortization:

	September 30, 2015			December 31, 2014
Goodwill (1)	$	28,731		$	28,866
Intangible assets:
Indefinite lived intangibles
Trademarks and trade names	$	2,708		$	2,708
Finite lived intangibles
Developed technology (2)	$	40,100		$	40,100
Accumulated amortization	(620		)	(285		)
Developed technology, net	$	39,480		$	39,815
License	$	100		$	100
Accumulated amortization	(93		)	(71		)
License, net	$	7		$	29
Customer relationships	$	—		$	480
Accumulated amortization	—			(400		)
Customer relationships, net	$	—		$	80
Acquired Shonin approval (3)	$	1,000		$	1,000
Accumulated amortization	(917		)	(167		)
Acquired Shonin approval, net	$	83		$	833
Intangible assets (excluding goodwill), net	$	42,278		$	43,465

(1) Difference in the value between these dates is solely due to a foreign currency translation adjustment.

(2) Was reclassified in the first quarter of 2013 from in-process research and development to finite lived intangibles, which coincided with the European commercial launch of the product (Nellix EVAS System) associated with this intangible asset. A significant portion of this intangible asset will not begin amortization until the U.S. launch of this product, currently scheduled for 2016.

(3) Regulatory approval for Intuitrak in Japan acquired through an amendment with a distributor in the fourth quarter of 2014.

Amortization expense for intangible assets for the three months endedSeptember 30, 2015 and 2014 was $0.4 million and $0.1 million, respectively. For the nine months endedSeptember 30, 2015 and 2014 amortization expense for intangible assets was $1.2 million and $0.3 million, respectively.

Estimated amortization expense for the five succeeding years and thereafter (which includes amortization of intangible assets which commenced in February 2013 with the commercial launch of the Nellix System in Europe) is as follows:

Remainder of 2015	$	202
2016	715
2017	1,717
2018	3,207
2019	4,397
2020	5,702
2021 & Thereafter	23,630
Total	$	39,570

(d) Marketable securities

Investments in held-to-maturity marketable securities consist of the following at September 30, 2015 and December 31, 2014:

	September 30, 2015
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Asset backed securities	$	193	$	—	$	—		$	193
Agency bonds	4,000		—		—			4,000
Corporate bonds	1,703		—		(1		)	1,702
Commercial paper	10,094		1		—			10,095
Government securities	16,901		9		—			16,910
Total	$	32,891	$	10	$	(1	)	$	32,900
	December 31, 2014
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Asset backed securities	$	3,633	$	—	$	—		$	3,633
Corporate bonds	15,707		—		(8		)	15,699
Commercial paper	40,531		5		—			40,536
Total	$	59,871	$	5	$	(8	)	$	59,868

At September 30, 2015, the Company’s investments included 5 held-to-maturity debt securities in unrealized loss positions with a total unrealized loss of approximately $1 thousand and a total fair market value of approximately $7.3 million. All investments with gross unrealized losses have been in unrealized loss positions for less than 7 months. The unrealized losses were caused by interest rate fluctuations. There was no change in the credit risk of the securities. The Company does not intend to sell the securities and it is not likely that the Company will be required to sell the securities before the expected recovery of their amortized cost bases. There were no realized gains or losses on the investments for the three and nine months endedSeptember 30, 2015. All of the Company's investments of held-to-maturity securities will mature within less than 12 months with an average maturity of 6 months.

(e) Fair Value Measurements

The following fair value hierarchy table presents information about each major category of the Company’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014:

	Fair value measurement at reporting date using:
	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2015
Cash and cash equivalents	$	35,404	$	—	$	—	$	35,404
Contingently issuable common stock	$	—	$	—	$	14,800	$	14,800
At December 31, 2014
Cash and cash equivalents	$	26,798	$	—	$	—	$	26,798
Contingently issuable common stock	$	—	$	—	$	14,600	$	14,600

There were no re-measurements to fair value during the nine months ended September 30, 2015 of financial assets and liabilities that are not measured at fair value on a recurring basis. There were no transfers between Level 1, Level 2 or Level 3 securities during the nine months ended September 30, 2015.

(f) Financial Instruments Not Recorded at Fair Value on a Recurring Basis

We measure the fair value of our 2.25% Convertible Senior Notes due 2018 ("Senior Notes") carried at amortized cost quarterly for disclosure purposes. The estimated fair value of the Senior Notes is determined by Level 2 inputs and is based primarily on quoted market prices for the same or similar issues. Based on the market prices, the fair value of our long-term debt was $77.2 million as of September 30, 2015 and $84.5 million as of December 31, 2014.

We measure the fair value of our held-to-maturity marketable securities carried at amortized cost quarterly for disclosure purposes. The fair value of marketable securities is determined by Level 2 inputs and is based primarily on quoted market prices for the same or similar instruments.

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Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 10, 2013
Earnings Per Share, Basic and Diluted [Abstract]
Net loss	$ (10,917)	$ (13,938)	$ (35,131)	$ (17,636)
Shares used in computing basic and diluted net loss per share	67,810	65,494	67,568	63,444
Basic and diluted net loss per share	$ (0.16)	$ (0.21)	$ (0.52)	$ (0.28)
Securities Excluded from Calculations of Earnings Per Share Because Impact Would Have Been Anti-Dilutive [Abstract]
Outstanding securities used in calculations	1,942	2,218	2,119	2,432
Convertible notes	$ 73,052		$ 73,052		$ 70,407
Potential Dilutive Effect of Securities [Abstract]
Conversion of the Notes	3,588	3,588	3,588	3,588
Convertible Debt
Securities Excluded from Calculations of Earnings Per Share Because Impact Would Have Been Anti-Dilutive [Abstract]
Convertible notes						$ 86,300
Stated interest rate					2.25%
Common stock options
Securities Excluded from Calculations of Earnings Per Share Because Impact Would Have Been Anti-Dilutive [Abstract]
Outstanding securities used in calculations	1,600	1,816	1,739	1,881
Restricted stock awards
Securities Excluded from Calculations of Earnings Per Share Because Impact Would Have Been Anti-Dilutive [Abstract]
Outstanding securities used in calculations	135	240	133	360
Restricted stock units
Securities Excluded from Calculations of Earnings Per Share Because Impact Would Have Been Anti-Dilutive [Abstract]
Outstanding securities used in calculations	207	162	247	191

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Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents		$ 35,404	$ 26,798
Marketable securities		32,891	59,871
Accounts receivable, net allowance for doubtful accounts of $283 and $185, respectively.		27,158	26,113
Other receivables		304	498
Inventories		33,422	31,325
Prepaid expenses and other current assets		3,113	3,162
Total current assets		132,292	147,767
Property and equipment, net		23,865	25,696
Goodwill	[1]	28,731	28,866
Intangibles, net		42,278	43,465
Deposits and other assets		1,985	2,415
Total assets		229,151	248,209
Current liabilities:
Accounts payable		13,788	11,027
Accrued payroll		13,800	13,337
Accrued expenses and other current liabilities		5,379	5,260
Total current liabilities		32,967	29,624
Deferred income tax		879	879
Deferred rent		8,065	8,060
Other liabilities		279	489
Contingently issuable common stock		14,800	14,600
Convertible notes		73,052	70,407
Total liabilities		$ 130,042	$ 124,059
Commitments and contingencies
Stockholders’ equity:
Convertible preferred stock, $0.001 par value; 5,000,000 shares authorized. No shares issued and outstanding.		$ 0	$ 0
Common stock, $0.001 par value; 100,000,000 shares authorized. 67,968,865 and 67,321,769 shares issued, respectively. 67,788,911 and 67,159,511 shares outstanding, respectively.		68	67
Treasury stock, at cost, 179,954 and 162,258 shares, respectively.		(2,619)	(2,328)
Additional paid-in capital		384,226	372,639
Accumulated deficit		(283,631)	(248,500)
Accumulated other comprehensive income		1,065	2,272
Total stockholders’ equity		99,109	124,150
Total liabilities and stockholders’ equity		$ 229,151	$ 248,209

[1] Difference in the value between these dates is solely due to a foreign currency translation adjustment.

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Description of Business, Basis of Presentation, and Operating Segment

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of Business, Basis of Presentation, and Operating Segment

Description of Business, Basis of Presentation, and Operating Segment

(a) Description of Business

Endologix, Inc. (the "Company") is a Delaware corporation with corporate headquarters and production facilities located in Irvine, California. The Company develops, manufactures, markets, and sells innovative medical devices for the treatment of aortic disorders. The Company's products are intended for the minimally invasive endovascular treatment of abdominal aortic aneurysms ("AAA"). The Company's AAA products are built on one of two platforms: (1) traditional minimally-invasive endovascular repair ("EVAR") or (2) endovascular sealing (“EVAS”), the Company's innovative solution for sealing the aneurysm sac while maintaining blood flow through two blood flow lumens. The Company's current EVAR products include the Endologix AFX Endovascular AAA System (“AFX”), the VELA Proximal Endograft (“VELA”) and the Endologix Intuitrak Endovascular AAA System (“Intuitrak”). The Company's current EVAS product is the Nellix Endovascular Aneurysm Sealing System (“Nellix EVAS System”). Sales of the Company's EVAR and EVAS platforms (including extensions and accessories) to hospitals in the U.S. and Europe, and to third-party international distributors, provide the sole source of the Company's reported revenue.

The Company's EVAR products consist of (i) a cobalt chromium alloy stent covered by polytetrafluoroethylene (commonly referred to as "ePTFE") graft material (“Stent Graft”) and (ii) an accompanying delivery system. Once fixed in its proper position within the abdominal aorta, the Company's EVAR device provides a conduit for blood flow, thereby relieving pressure within the weakened or “aneurysmal” section of the vessel wall, which greatly reduces the potential for the AAA to rupture.

The Company's EVAS product consists of (i) bilateral covered stents with endobags, (ii) a biocompatible polymer injected into the endobags to seal the aneurysm and (iii) a delivery system and polymer dispenser. The Company's EVAS product seals the entire aneurysm sac effectively excluding the aneurysm sac reducing the likelihood of future aneurysm rupture. Additionally, it has the potential to reduce post procedural re-interventions.

(b)Basis of Presentation

The accompanying Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q have been prepared in accordance with generally accepted accounting principles in the United States of America ("GAAP") and the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). These financial statements include the financial position, results of operations, and cash flows of the Company, including its subsidiaries, all of which are wholly-owned. All inter-company accounts and transactions have been eliminated in consolidation. For the three and nine months endedSeptember 30, 2015 and 2014, there were no related party transactions.

The interim financial data as of September 30, 2015 is unaudited and is not necessarily indicative of the results for a full year. In the opinion of the Company's management, the interim data includes normal and recurring adjustments necessary for a fair presentation of the Company's financial results for the three and nine months endedSeptember 30, 2015. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to SEC rules and regulations relating to interim financial statements.

The accompanying Condensed Consolidated Financial Statements should be read in conjunction with the Company's audited Consolidated Financial Statements and Notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2014, filed with the SEC on March 2, 2015.

On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU ") No. 2014-09, "Revenue from Contracts with Customers", which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The FASB agreed to a one-year deferral of the revenue recognition standard's effective date for all entities. The new standard is effective for the Company on January 1, 2018. The standard permits the use of either the retrospective or cumulative effect transition method. Early application is permitted, but not before the original effective date, which would have been January 1, 2017 for the Company. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.

On April 7, 2015, the FASB issued ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs", which requires debt issuance costs related to a recognized debt liability to be presented on the balance sheet as a direct deduction from the debt liability, similar to the presentation of debt discounts. The ASU is effective for the Company on January 1, 2016. Early adoption is permitted. The Company is evaluating the effect that ASU 2015-03 will have on its consolidated financial statements and related disclosures.

On July 22, 2015, the FASB issued ASU No. 2015-11, “Simplifying the Measurement of Inventory,” which requires an entity to measure inventory within the scope of the amendment at the lower of cost and net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The guidance is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The Company is currently assessing the impact this guidance will have on its consolidated financial statements.

In September 2015, the FASB issued ASU No. 2015-16, “Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments,” which requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The new guidance also requires that the acquirer record, in the same period's financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The guidance is effective for fiscal years beginning after December 15, 2016, and interim periods within fiscal years beginning after December 15, 2017. Early adoption is permitted. The Company is currently assessing the impact this guidance will have on its consolidated financial statements

(c) Operating Segment

The Company has one operating and reporting segment that is focused exclusively on the development, manufacture, marketing, and sale of EVAR and EVAS product for the treatment of aortic disorders. For the three and nine months endedSeptember 30, 2015, all of the Company's revenue and related expenses were solely attributable to these activities. Substantially all of the Company's long-lived assets are located in the U.S.

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Commitments and Contingencies (Schedule of Future Minimum Lease Payments, Fiscal Year Maturity) (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Non-Cancelable Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Remainder of 2015	$ 589
2016	2,468
2017	2,450
2018	2,385
2019	2,389
2020	2,504
2021 and thereafter	22,884
Total	$ 35,669

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Contractual Obligation, Fiscal Year Maturity Schedule

Future minimum payments by year under non-cancelable leases with initial terms in excess of one year were as follows as of September 30, 2015:

Remainder of 2015	$	589
2016	2,468
2017	2,450
2018	2,385
2019	2,389
2020	2,504
2021 and thereafter	22,884
Total	$	35,669

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Commitments and Contingencies (Narrative) (Details) $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 12, 2013 USD ($) ft² facility option	Dec. 31, 2014 lease	Sep. 30, 2015 USD ($) letters_of_credit	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) letters_of_credit	Sep. 30, 2014 USD ($)
Operating Leased Assets [Line Items]
Rent expense | $			$ 0.6	$ 0.7	$ 1.8	$ 2.1
Number of facilities | facility	2
Aggregate square feet	129,000
Term of contract	15 years
Number of renewal options | option	1
Renewal term	5 years
Initial base rent | $	$ 1.9
Landlord-funded improvements | $	$ 6.8
Number of letters of credit | letters_of_credit			2		2
Number of leases exited | lease		1
Operating Leases, Future Minimum Payments Due, Base Rent Increases [Abstract]
2015	3.00%
2016	3.00%
2017	3.00%
2018	3.00%
2019	3.00%
2021 and thereafter	4.00%
Manufacturing Facility
Operating Leased Assets [Line Items]
Aggregate square feet	57,000
Building
Operating Leased Assets [Line Items]
Aggregate square feet	2,900

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Description of Business, Basis of Presentation, and Operating Segment (Details)	9 Months Ended
	Sep. 30, 2015 segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments	1
Number of reportable segments	1

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Use of Estimates and Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Use of Estimates and Summary of Significant Accounting Policies

Use of Estimates and Summary of Significant Accounting Policies

The preparation of financial statements in conformity with GAAP requires the Company's management to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenue and expenses, and related disclosure of contingent liabilities. On an on-going basis, the Company's management evaluates its estimates, including those related to (i) collectibility of customer accounts; (ii) whether the cost of inventories can be recovered; (iii) the value of goodwill and intangible assets; (iv) realization of tax assets and estimates of tax liabilities; (v) likelihood of payment and value of contingent liabilities; and (vi) potential outcome of litigation. Such estimates are based on management's judgment which takes into account historical experience and various assumptions. Nonetheless, actual results may differ from management's estimates.

For a complete summary of our significant accounting policies, please refer to Note 2, "Use of Estimates and Summary of Significant Accounting Policies", in Part II, Item 8, of our 2014 Annual Report on Form 10-K for the year ended December 31, 2014, filed March 2, 2015. There have been no material changes to our significant accounting policies during the three and nine months endedSeptember 30, 2015.

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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Allowance for doubtful accounts	$ 283	$ 185
Common stock, par value (per share)	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	67,968,865	67,321,769
Common stock, shares outstanding	67,788,911	67,159,511
Treasury stock, shares	179,954,000	162,258,000
Convertible Preferred Stock
Convertible preferred stock, par value (per share)	$ 0.001	$ 0.001
Convertible preferred stock, shares authorized	5,000,000	5,000,000
Convertible preferred stock, shares issued	0	0
Convertible preferred stock, shares outstanding	0	0

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Description of Business, Basis of Presentation, and Operating Segment (Policies)

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q have been prepared in accordance with generally accepted accounting principles in the United States of America ("GAAP") and the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). These financial statements include the financial position, results of operations, and cash flows of the Company, including its subsidiaries, all of which are wholly-owned. All inter-company accounts and transactions have been eliminated in consolidation. For the three and nine months endedSeptember 30, 2015 and 2014, there were no related party transactions.

The interim financial data as of September 30, 2015 is unaudited and is not necessarily indicative of the results for a full year. In the opinion of the Company's management, the interim data includes normal and recurring adjustments necessary for a fair presentation of the Company's financial results for the three and nine months endedSeptember 30, 2015. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to SEC rules and regulations relating to interim financial statements.

The accompanying Condensed Consolidated Financial Statements should be read in conjunction with the Company's audited Consolidated Financial Statements and Notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2014, filed with the SEC on March 2, 2015.

Operating segment

Operating Segment

The Company has one operating and reporting segment that is focused exclusively on the development, manufacture, marketing, and sale of EVAR and EVAS product for the treatment of aortic disorders. For the three and nine months endedSeptember 30, 2015, all of the Company's revenue and related expenses were solely attributable to these activities. Substantially all of the Company's long-lived assets are located in the U.S.

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Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 26, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	ENDOLOGIX INC /DE/
Entity Central Index Key	0001013606
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		67,789,498
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3

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Balance Sheet Account Detail (Tables)

9 Months Ended

Sep. 30, 2015

Balance Sheet Related Disclosures [Abstract]

Property and Equipment

Property and equipment consisted of the following:

	September 30, 2015			December 31, 2014
Production equipment, molds, and office furniture	$	13,293		$	12,943
Computer hardware and software	6,267			6,457
Leasehold improvements	14,336			15,729
Construction in progress (software and related implementation, production equipment, and leasehold improvements)	346			2,564
Property and equipment, at cost	$	34,242		$	37,693
Accumulated depreciation	(10,377		)	(11,997		)
Property and equipment, net	$	23,865		$	25,696

Schedule of Inventories

Inventories consisted of the following:

	September 30, 2015		December 31, 2014
Raw materials	$	6,919	$	6,728
Work-in-process	7,329		5,946
Finished goods	19,174		18,651
Total Inventories	$	33,422	$	31,325

Schedule of Intangible Assets and Goodwill

The following table presents goodwill, indefinite lived intangible assets, finite lived intangible assets and related accumulated amortization:

	September 30, 2015			December 31, 2014
Goodwill (1)	$	28,731		$	28,866
Intangible assets:
Indefinite lived intangibles
Trademarks and trade names	$	2,708		$	2,708
Finite lived intangibles
Developed technology (2)	$	40,100		$	40,100
Accumulated amortization	(620		)	(285		)
Developed technology, net	$	39,480		$	39,815
License	$	100		$	100
Accumulated amortization	(93		)	(71		)
License, net	$	7		$	29
Customer relationships	$	—		$	480
Accumulated amortization	—			(400		)
Customer relationships, net	$	—		$	80
Acquired Shonin approval (3)	$	1,000		$	1,000
Accumulated amortization	(917		)	(167		)
Acquired Shonin approval, net	$	83		$	833
Intangible assets (excluding goodwill), net	$	42,278		$	43,465

(1) Difference in the value between these dates is solely due to a foreign currency translation adjustment.

(2) Was reclassified in the first quarter of 2013 from in-process research and development to finite lived intangibles, which coincided with the European commercial launch of the product (Nellix EVAS System) associated with this intangible asset. A significant portion of this intangible asset will not begin amortization until the U.S. launch of this product, currently scheduled for 2016.

(3) Regulatory approval for Intuitrak in Japan acquired through an amendment with a distributor in the fourth quarter of 2014.

Schedule of Expected Amortization Expense

Estimated amortization expense for the five succeeding years and thereafter (which includes amortization of intangible assets which commenced in February 2013 with the commercial launch of the Nellix System in Europe) is as follows:

Remainder of 2015	$	202
2016	715
2017	1,717
2018	3,207
2019	4,397
2020	5,702
2021 & Thereafter	23,630
Total	$	39,570

Marketable Securities

Investments in held-to-maturity marketable securities consist of the following at September 30, 2015 and December 31, 2014:

	September 30, 2015
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Asset backed securities	$	193	$	—	$	—		$	193
Agency bonds	4,000		—		—			4,000
Corporate bonds	1,703		—		(1		)	1,702
Commercial paper	10,094		1		—			10,095
Government securities	16,901		9		—			16,910
Total	$	32,891	$	10	$	(1	)	$	32,900
	December 31, 2014
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Asset backed securities	$	3,633	$	—	$	—		$	3,633
Corporate bonds	15,707		—		(8		)	15,699
Commercial paper	40,531		5		—			40,536
Total	$	59,871	$	5	$	(8	)	$	59,868

Fair Value Measurements, Recurring and Nonrecurring

The following fair value hierarchy table presents information about each major category of the Company’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014:

	Fair value measurement at reporting date using:
	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2015
Cash and cash equivalents	$	35,404	$	—	$	—	$	35,404
Contingently issuable common stock	$	—	$	—	$	14,800	$	14,800
At December 31, 2014
Cash and cash equivalents	$	26,798	$	—	$	—	$	26,798
Contingently issuable common stock	$	—	$	—	$	14,600	$	14,600

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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenue	$ 38,231	$ 37,150	$ 114,380	$ 108,741
Cost of goods sold	11,195	13,573	36,306	32,362
Gross profit	27,036	23,577	78,074	76,379
Operating expenses:
Research and development	5,459	5,313	17,683	13,876
Clinical and regulatory affairs	3,956	2,482	11,003	7,404
Marketing and sales	19,662	18,438	59,103	53,748
General and administrative	7,293	6,271	21,432	19,366
Total operating expenses	36,370	32,504	109,221	94,394
Loss from operations	(9,334)	(8,927)	(31,147)	(18,015)
Other income (expense):
Interest income	34	63	116	189
Interest expense	(1,506)	(1,422)	(4,460)	(4,261)
Other income (expense), net	(89)	(4,198)	735	(3,987)
Change in fair value of contingent consideration related to acquisition	0	200	(200)	8,228
Total other income (expense)	(1,561)	(5,357)	(3,809)	169
Net loss before income tax (expense) benefit	(10,895)	(14,284)	(34,956)	(17,846)
Income tax (expense) benefit	(22)	346	(175)	210
Net loss	(10,917)	(13,938)	(35,131)	(17,636)
Other comprehensive income (loss) foreign currency translation	463	2,704	(1,207)	2,727
Comprehensive loss	$ (10,454)	$ (11,234)	$ (36,338)	$ (14,909)
Basic and diluted net loss per share	$ (0.16)	$ (0.21)	$ (0.52)	$ (0.28)
Shares used in computing basic and diluted net loss per share	67,810	65,494	67,568	63,444

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Revenue by Geographic Region

9 Months Ended

Sep. 30, 2015

Geographic Areas, Revenues from External Customers [Abstract]

Revenue by Geographic Region

Revenue by Geographic Region

The Company's revenue by geographic region, was as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
United States	$	26,915	70.4%	$	27,067	72.9%	$	80,825	70.7%	$	79,048	72.7%
Europe	$	7,789	20.4%	$	6,937	18.7%	$	22,923	20.0%	$	21,337	19.6%
Rest of World ("ROW"):
Latin America	$	1,908	5.0%	$	1,858	5.0%	$	5,168	4.5%	$	4,085	3.8%
Asia/Pacific	1,619		4.2%	1,288		3.5%	5,464		4.8%	4,271		3.9%
Total ROW	$	3,527	9.2%	$	3,146	8.5%	$	10,632	9.3%	$	8,356	7.7%
Revenue	$	38,231	100.0%	$	37,150	100.0%	$	114,380	100.0%	$	108,741	100.0%

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Credit Facilities

9 Months Ended

Sep. 30, 2015

Line of Credit Facility [Abstract]

Credit Facilities

Credit Facilities

2.25% Convertible Senior Notes

On December 10, 2013, the Company issued $86.3 million in aggregate principal amount of 2.25% Convertible Senior Notes (the “Senior Notes”). The Senior Notes mature on December 15, 2018 unless earlier repurchased by the Company or converted. The Company received net proceeds of approximately $82.6 million from the sale of the Senior Notes, after deducting underwriting discounts and commissions and offering expenses payable by the Company. Interest is payable on the Senior Notes on June 15 and December 15 of each year, beginning June 15, 2014.

The Senior Notes are governed by the terms of a base indenture (the “Base Indenture”), as supplemented by the first supplemental indenture relating to the Senior Notes (the “First Supplemental Indenture,” and together with the Base Indenture, the “Indenture”), between the Company and Wells Fargo Bank, National Association (the “Trustee”), each of which were entered into on December 10, 2013.

The Senior Notes are senior unsecured obligations and are: (a) senior in right of payment to the Company’s future indebtedness that is expressly subordinated in right of payment to the Senior Notes; (b) equal in right of payment to the Company’s existing and future unsecured indebtedness that is not so subordinated; (c) effectively junior to any of the Company’s secured indebtedness to the extent of the value of the assets securing such indebtedness; and (d) and structurally junior to all existing and future indebtedness (including trade payables) incurred by the Company’s subsidiaries.

The Company may not redeem the Senior Notes prior to December 15, 2016. On or after December 15, 2016, the Company may redeem for cash all or any portion of the Senior Notes, at its option, but only if the closing sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period ending on, and including, the second trading day immediately preceding the date on which the Company provides notice of redemption, exceeds 130% of the conversion price on each applicable trading day. The redemption price will equal 100% of the principal amount of the Senior Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the Senior Notes.

Holders may convert their Senior Notes at any time prior to the close of business on the business day immediately preceding September 15, 2018 only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on March 31, 2014, if the closing sale price of the Company’s common stock, for at least 20 trading days (whether or not consecutive) in the period of 30 consecutive trading days ending on the last trading day of the calendar quarter immediately preceding the calendar quarter in which the conversion occurs, is more than 130% of the conversion price of the Senior Notes in effect on each applicable trading day; (2) during the five consecutive business-day period following any five consecutive trading-day period in which the trading price for the Senior Notes for each such trading day was less than 98% of the closing sale price of the Company’s common stock on such date multiplied by the then-current conversion rate; (3) if the Company calls all or any portion of the notes for redemption, at any time prior to the close of business on the second scheduled trading day prior to the redemption date; or (4) upon the occurrence of specified corporate events. On or after September 15, 2018 until the close of business on the second scheduled trading day immediately preceding the stated maturity date, holders may surrender their Senior Notes for conversion at any time, regardless of the foregoing circumstances.

Upon conversion, the Company will, at its election, pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock.

The initial conversion rate of the Senior Notes will be 41.6051 shares of the Company’s common stock for each $1,000 principal amount of Senior Notes, which represents an initial conversion price of approximately $24.04 per share. Following certain corporate transactions that occur on or prior to the stated maturity date or the Company’s delivery of a notice of redemption, the Company will increase the conversion rate for a holder that elects to convert its Senior Notes in connection with such a corporate transaction.

If a fundamental change (as defined in the Indenture) occurs prior to the stated maturity date, holders may require the Company to purchase for cash all or any portion of their Senior Notes at a fundamental change purchase price equal to 100% of the principal amount of the Senior Notes to be purchased, plus accrued and unpaid interest to, but excluding, the fundamental change purchase date.

The Indenture contains customary terms and covenants and events of default with respect to the Senior Notes. If an event of default (as defined in the Indenture) occurs and is continuing, either the Trustee or the holders of at least 25% in aggregate principal amount of the outstanding Senior Notes may declare the principal amount of the Senior Notes to be due and payable immediately by notice to the Company (with a copy to the Trustee). If an event of default arising out of certain events of bankruptcy, insolvency or reorganization involving the Company or a significant subsidiary (as set forth in the Indenture) occurs with respect to us, the principal amount of the Senior Notes and accrued and unpaid interest, if any, will automatically become immediately due and payable.

The Company was not required to separate the conversion option in the Senior Notes under ASC 815, "Derivatives and Hedging", and has the ability to settle the Senior Notes in cash, common stock or a combination of cash and common stock, at its option. In accordance with cash conversion guidance contained in ASC 470-20, "Debt with Conversion and Other Options", the Company accounted for the Senior Notes by allocating the issuance proceeds between the liability and the equity component. The equity component is classified in stockholders’ equity and the resulting discount on the liability component is accreted such that interest expense equals the Company’s nonconvertible debt borrowing rate. The separation was performed by first determining the fair value of a similar debt that does not have an associated equity component. That amount was then deducted from the initial proceeds of the Senior Notes as a whole to arrive at a residual amount, which was allocated to the conversion feature that is classified as equity. The initial fair value of the indebtedness was $66.9 million resulting in a $19.3 million allocation to the embedded conversion option. The embedded conversion option was recorded in stockholders’ equity and as debt discount, to be subsequently accreted to interest expense over the term of the Senior Notes. Underwriting discounts and commissions and offering expenses totaled $3.7 million and were allocated between the liability and the equity component in proportion to the allocation of proceeds and accounted for as debt issuance costs and equity issuance costs, respectively. As a result, $2.9 million attributable to the indebtedness was recorded as deferred financing costs in other assets, to be subsequently amortized as interest expense over the term of the Senior Notes, and $0.8 million attributable to the equity component was recorded as a reduction to additional paid-in-capital in stockholders’ equity.

As of September 30, 2015, the Company had outstanding borrowings of $73.1 million, and deferred financing costs of $2.1 million, related to the Senior Notes. There are no principal payments due during the term. Annual interest expense on these notes will range from $5.7 million to $6.9 million through maturity.

Capped Call Transactions

On December 10, 2013, in connection with the pricing of the Senior Notes and the exercise in full of their overallotment option by the underwriters, the Company entered into privately-negotiated capped call transactions (the “Capped Call Transactions”) with Bank of America, N.A., an affiliate of Merrill Lynch, Pierce, Fenner & Smith Incorporated. The Capped Call Transactions initial conversion rate and number of options substantially corresponds to each $1,000 principal amount of Senior Notes. The Company used approximately $7.4 million of the net proceeds from the Senior Notes offering to pay for the cost of the Capped Call Transactions.

The Capped Call Transactions are separate transactions entered into by the Company with Bank of America, N.A., are not part of the terms of the Senior Notes and will not change the holders’ rights under the Senior Notes. The Capped Call Transactions have anti-dilution adjustments substantially similar to those applicable to the Senior Notes. The Capped Call Transactions are derivative instruments that are recorded within stockholders’ equity because they meet an exemption from mark-to-market derivative accounting.

The Capped Call Transactions are expected generally to reduce the potential dilution and/or offset potential cash payments that the Company is required to make in excess of the principal amount upon conversion of the Senior Notes in the event that the market price per share of the Company’s common stock, as measured under the terms of the Capped Call Transactions, is greater than the strike price of the Capped Call Transactions, which initially corresponds to the $24.04 conversion price of the Senior Notes. If, however, the market price per share of the Company’s common stock, as measured under the terms of the Capped Call Transactions, exceeds the initial cap price of $29.02, there would nevertheless be dilution and/or there would not be an offset of such potential cash payments, in each case, to the extent that such market price exceeds the cap price of the Capped Call Transactions.

The Company will not be required to make any cash payments to Bank of America, N.A. or any of its affiliates upon the exercise of the options that are a part of the Capped Call Transactions, but will be entitled to receive from Bank of America, N.A. (or an affiliate thereof) a number of shares of the Company’s common stock and/or an amount of cash generally based on the amount by which the market price per share of the Company’s common stock, as measured under the terms of the Capped Call Transactions, is greater than the strike price of the Capped Call Transactions during the relevant valuation period under the Capped Call Transactions. However, if the market price of the Company’s common stock, as measured under the terms of the Capped Call Transactions, exceeds the cap price of the Capped Call Transactions during such valuation period under the Capped Call Transactions, the number of shares of common stock and/or the amount of cash the Company expects to receive upon exercise of the Capped Call Transactions will be capped based on the amount by which the cap price exceeds the strike price of the Capped Call Transactions.

For any conversions of Senior Notes prior to the close of business on the 55th scheduled trading day immediately preceding the stated maturity date of the Senior Notes, including without limitation upon an acquisition of the Company or similar business combination, a corresponding portion of the Capped Call Transactions will be terminated. Upon such termination, the portion of the Capped Call Transactions being terminated will be settled at fair value (subject to certain limitations), as determined by Bank of America, N.A., in its capacity as calculation agent under the Capped Call Transactions, which the Company expects to receive from Bank of America, N.A., and no payments will be due Bank of America, N.A. The capped call expires on December 13, 2018.

Wells Fargo line of credit

In October 2009, the Company entered into a revolving credit facility with Wells Fargo Bank (“Wells”), which was last amended on February 3, 2015, whereby the Company may borrow up to $20.0 million, subject to the calculation and limitation of a borrowing base (the “Wells Credit Facility”). A sub-feature in the line of credit allowed for the issuance of up to $7.5 million in letters of credit. The Wells Credit Facility was collateralized by all of the Company's assets, except its intellectual property.

The Wells Credit Facility contained financial covenants requiring the Company to (i) maintain a minimum current ratio of 2.0 , equal to the quotient of modified current assets to current liabilities, as defined in the Wells Credit Facility (the "Current Ratio Covenant"), and (ii) not to exceed pre-tax net loss (excluding non-cash contingent consideration associated with the acquisition of Nellix) of $13.5 million for the three months ended March 31, 2015; $23.0 million for the six months ended June 30, 2015; and $35.0 million for the nine months ended September 30, 2015; (the "Net Loss Covenant"). The Wells Credit Facility also included negative covenants limiting capital expenditures in 2015 to an aggregate of $6.0 million as well as limiting operating lease expenses to $3.0 million in any calendar year. The financial covenants as of and for the three and nine months endedSeptember 30, 2015 were no longer applicable due to the termination of the Wells Credit Facility on July 21, 2015.

The Wells Credit Facility also contained a “material adverse change” clause (“MAC”). If the Company encountered difficulties that would qualify as a MAC in its (i) operations, (ii) condition (financial or otherwise), or (iii) ability to repay amounts outstanding under the Wells Credit Facility, it could be canceled at Wells' sole discretion. Wells could then elect to declare the indebtedness, together with accrued interest and other fees, to be immediately due and payable and proceed against any collateral securing such indebtedness. On July 21, 2015, the Company terminated the credit facility. As of the termination date, the Company had no outstanding borrowings or letters of credits issued under the Wells Credit Facility.

Bank of America line of credit

On July 21, 2015, the Company entered into a revolving credit facility with Bank of America, N.A. (“BOA”), whereby the Company may borrow up to $20.0 million (the “BOA Credit Facility”). All amounts owing under the BOA Credit Facility will become due and payable upon its expiration on July 21, 2017. A sub-feature in the line of credit allows for the issuance of up to $10.0 million in letters of credit. As of September 30, 2015, the Company issued a total of $1.0 million of letters of credit under the BOA credit facility. The BOA Credit Facility is collateralized by all of the Company's assets, except its intellectual property. The BOA Credit Facility can be terminated at any time during the two years by Company upon three business day notice. The BOA Credit Facility usage is priced at a spread over the one, two, three and six month LIBOR rates, and is subject to a covenant related to timely providing of publicly reported information, other indebtedness and a liquidity covenant tied to “Unencumbered Liquid Assets” ("ULA") (as defined here) of not less than $30.0 million. ULA means the following assets (excluding assets of any retirement plan): (a) cash and cash equivalents; (b) marketable securities invested in accordance with the Company’s investment policy and (c) marketable securities invested in accordance with any update to the Company’s investment policy so long as such update been approved by BOA in its reasonable discretion. Such assets must be (i) held in the United States at BOA and/or its affiliates, (ii) not the subject of any lien, pledge, security interest or other arrangement with any creditor (other than BOA or one of BOA’s affiliates) to have his claim satisfied out of the asset (or proceeds thereof) prior to the general creditors of the owner of the asset, (iii) held solely in the name of one or more credit parties subject to this covenant (with no other persons or entities having ownership rights therein), (iv) convertible to cash within five (5) days, and (v) not counted or included to satisfy any other liquidity requirement under any other obligation, whether with BOA or any other lender, unless otherwise expressly agreed by BOA in writing. The Company was in compliance with this covenant as of September 30, 2015.

If not in default, the Company has the ability to reduce the ULA covenant requirement by reducing the BOA Credit Facility, with the ULA maintained at 1.5 times the BOA Credit Facility. As of September 30, 2015, the Company had no borrowings under the BOA Credit Facility.

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Contingently Issuable Common Stock (Tables)

9 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

Schedule of Business Acquisitions by Acquisition, Contingent Consideration

Adjustments to the fair value of the Contingent Payment are recognized within other income (expense) in the Condensed Consolidated Statements of Operations and Comprehensive Loss.

	Fair Value of Contingently Issuable Common Stock
December 31, 2014	$	14,600
Fair Value Adjustment of Contingent Payment for the nine months ended September 30, 2015	200
September 30, 2015	$	14,800

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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2015

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

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Stock-based compensation expense included in cost of goods sold and operating expenses during the three and nine months endedSeptember 30, 2015 and 2014, was as follows:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2015		2014			2015		2014
Cost of goods sold	$	257	$	240		$	731	$	643
Operating expenses:
Research and development	252		207			737		543
Clinical and regulatory affairs	321		(195		)	749		67
Marketing and sales	888		931			2,476		2,125
General and administrative	832		632			2,476		2,190
Total operating expenses	$	2,293	$	1,575		$	6,438	$	4,925
Total	$	2,550	$	1,815		$	7,169	$	5,568

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Income Tax Expense

9 Months Ended

Sep. 30, 2015

Current Income Tax Expense (Benefit), Continuing Operations [Abstract]

Income Tax Expense

Income Tax Expense

The Company applied an estimated annual effective tax rate (“ETR”) approach for calculating a tax provision for interim periods. The Company recorded a provision for income taxes of $22 thousand and $0.2 million for the three and nine months endedSeptember 30, 2015, respectively. The Company's ETR was (0.2)% and (0.5)% for the three and nine months endedSeptember 30, 2015, respectively.  The Company's ETR for the three and nine months endedSeptember 30, 2015 differs from the U.S. federal statutory tax rate of 34% primarily as a result of nondeductible expenses (including the Nellix Contingent Payment), state income taxes, foreign income taxes, and the impact of a full valuation allowance on its deferred tax assets.

The Company has evaluated the available evidence supporting the realization of its deferred tax assets, including the amount and timing of future taxable income, and has determined that it is more likely than not that its net deferred tax assets will not be realized in the U.S. and certain foreign jurisdictions. Due to uncertainties surrounding the realization of the deferred tax assets, the Company maintains a full valuation allowance against substantially all deferred tax assets. If/when the Company determines that it will be able to realize some portion or all of its deferred tax assets, an adjustment to its valuation allowance on its deferred tax assets would have the effect of increasing net income in the period(s) such determination is made.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

(a) Leases

The Company leases its administrative, research, and manufacturing facilities located in Irvine, California and an administrative office located in Rosmalen, The Netherlands. These facility lease agreements require the Company to pay operating costs, including property taxes, insurance and maintenance. In addition, the Company has certain equipment under long-term agreements that are accounted for as operating leases.

Future minimum payments by year under non-cancelable leases with initial terms in excess of one year were as follows as of September 30, 2015:

Remainder of 2015	$	589
2016	2,468
2017	2,450
2018	2,385
2019	2,389
2020	2,504
2021 and thereafter	22,884
Total	$	35,669

Facilities rent expense for the three months endedSeptember 30, 2015 and 2014 was $0.6 million and $0.7 million, respectively. For the nine months endedSeptember 30, 2015 and 2014, facilities rent expense was $1.8 million and $2.1 million, respectively.

On June 12, 2013, the Company entered into a lease agreement for two adjacent office, research and development, and manufacturing facilities in Irvine, California.  The premises consist of approximately 129,000 combined square feet. The lease has a 15-year term beginning January 1, 2014 and provides for one optional five year extension. The initial base rent under the lease is $1.9 million per year, payable in monthly installments, and escalates by 3% per year for years 2015 through 2019, and 4% per year for years 2020 and beyond.  The Company received a rent abatement for the first nine months of the lease. These premises replaced the Company's existing Irvine facilities. The terms of this lease agreement provide for $6.8 million of landlord-funded improvements (and certain other allowances) to this facility, in order to best suit the Company's requirements.

The Company leased two adjacent facilities aggregating approximately 57,000 square feet in Irvine, California, under separate lease agreements where manufacturing was held. The Company exited one of these leases in December 2014 and the other lease in April 2015. The Company's Rosmalen facility is an administrative office of approximately 2,900 square feet and in August 2015, the Company extended the lease term for Rosmalen facility until December 2020.

(b) Employment Agreements and Retention Plan

On February 1, 2014, the Company entered into new employment agreements with certain of its executive officers under which payment and benefits would become payable in the event of termination by the Company for any reason other than cause, death or disability or termination by the employee for good reason (collectively, an “Involuntary Termination”) prior to, upon or following a change in control of the Company. The severance payment will generally be in a range of six to eighteen months of the employee’s then current salary for an Involuntary Termination prior to a change in control of the Company, and will generally be in a range of eighteen to twenty-four months of the employee’s then current salary for an Involuntary Termination upon or following a change in control of the Company.

(c) Legal Matters

We are from time to time involved in various claims and legal proceedings of a nature we believe are normal and incidental to a medical device business. These matters may include product liability, intellectual property, employment, and other general claims. Such cases and claims may raise complex factual and legal issues and are subject to many uncertainties, including, but not limited to, the facts and circumstances of each particular case or claim, the jurisdiction in which each suit is brought, and differences in applicable law. We accrue for contingent liabilities when it is probable that a liability has been incurred and the amount can be reasonably estimated. The accruals are adjusted periodically as assessments change or as additional information becomes available.

LifePort Sciences LLC v. Endologix, Inc.

On December 28, 2012, LifePort Sciences, LLC ("LifePort") filed a complaint against us in the U.S. District Court, District of Delaware, alleging that certain of our products infringe U.S. Patent Nos. 5,489,295, 6,117,167, 6,302,906, 5,993,481 and 5,676,696, which are alleged to be owned by LifePort. LifePort is seeking an unspecified amount of monetary damages for sale of our products and injunctive relief. We do not believe that we infringe on any of these patents and we intend to vigorously defend against this matter. The case is currently scheduled for trial in April 2016. We do believe, however, that the outcome will not have a material adverse effect on our financial position, results of operations, or cash flows. However, in order to avoid further legal costs and diversion of management resources, it is reasonably possible that we may reach a settlement with LifePort, which could result in a liability. However, we cannot presently estimate the amount, or range, of reasonably possible losses due to the nature of this potential litigation settlement.

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Contingently Issuable Common Stock

9 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

Contingently Issuable Common Stock

Contingently Issuable Common Stock

On October 27, 2010, the Company entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”) with Nepal Acquisition Corporation, a wholly-owned subsidiary of the Company (“Merger Sub”), Nellix, Inc. ("Nellix"), certain of Nellix’s stockholders named therein and Essex Woodlands Health Ventures, Inc., as representative of the former Nellix stockholders. On December 10, 2010 (the “Nellix Closing Date”), the Company completed the merger (the “Merger”) of Merger Sub with and into Nellix pursuant to the terms of the Merger Agreement. The purchase price consisted of 3.2 million shares of the Company's common stock, issuable to the former Nellix stockholders as of the Nellix Closing Date, then representing a value of $19.4 million. Under the agreement, additional payments, solely in the form of shares of the Company's common stock (the “Contingent Payment”), could be made upon the achievement of a revenue milestone and a regulatory approval milestone (collectively, the “Nellix Milestones”).

Under the merger agreement, the ultimate value of each Contingent Payment would be determined on the date that each Nellix Milestone is achieved. The number of issuable shares would be established using an applicable per share price, which is subject to a ceiling and/or floor, resulting at the closing of the merger in a potential maximum of 10.2 million shares issuable upon the achievement of the Nellix Milestones. As of the Closing Date, the aggregate fair value of the cash Contingent Payment was estimated to be $28.2 million.

The Merger Agreement provides that, in addition to the shares of common stock of the Company (the “Common Stock”) issued to the former Nellix stockholders at the closing of the Merger, the former Nellix stockholders were entitled to receive shares of the Common Stock if the Company’s sales of a Nellix product (the “Nellix Product”) outside of the United States exceeded $10.0 million within a certain time period following the Company’s receipt of CE mark approval for the Nellix Product (the “OUS Milestone”). The aggregate dollar value of the shares of the Common Stock to be issued upon achievement of the OUS Milestone ranged from a high of $24.0 million, or 6.9 million shares, to a low of $10.0 million, or 1.3 million shares. The price per share of the Common Stock to be issued upon achievement of the OUS Milestone was subject to a floor of $3.50 per share and a ceiling of $7.50 per share.

On June 17, 2014, the Company announced its achievement of the OUS Milestone and the issuance of an aggregate of 2.7 million unregistered shares of the Common Stock (the “OUS Milestone Shares”), plus an amount of cash in lieu of fractional shares, to the former Nellix stockholders. The Company offered and sold the OUS Milestone Shares in reliance upon exemptions from registration pursuant to Section 4(2) under the Securities Act of 1933, as amended (the “Securities Act”). The former Nellix stockholders previously gave representations to the Company regarding their investment intent, experience, financial sophistication, access to information regarding the Company and certain other matters to support the Company’s reasonable belief that it could rely upon the foregoing exemptions from registration pursuant to Section 4(2) of the Securities Act. No underwriting discounts or commissions were or will be paid in conjunction with the issuance of the OUS Milestone Shares. The Company previously filed a Registration Statement on Form S-3 (Registration No. 333-171639) (the “Form S-3”) for the purpose of registering for resale shares of the Common Stock issued or issuable pursuant to the Merger Agreement, including the OUS Milestone Shares. The Securities and Exchange Commission declared the Form S-3 effective on January 18, 2011.

In addition, if the Company receives approval from the FDA to sell the Nellix Product in the United States (the “PMA Milestone”), the Company will issue additional shares of the Common Stock to the former stockholders of Nellix. The dollar value of the shares of the Common Stock to be issued upon achievement of the PMA Milestone will be equal to $15.0 million (less the dollar value of certain cash payments and other deductions). The price per share of the shares of the Common Stock to be issued upon achievement of the PMA Milestone is subject to a stock price floor of $4.50 per share, but not subject to a stock price ceiling.

As of September 30, 2015 the Company's stock price last closed at $12.26 per share. Thus, had the PMA Milestone been achieved on September 30, 2015 the Contingent Payment would have comprised 1.1 million shares (based on the 30-day average closing stock price ending 5 days prior to the announcement), representing a value of $14.0 million.

The value of the Contingent Payment is derived using a discounted income approach model, with a range of probabilities and assumptions related to the timing and likelihood of achievement of the PMA Milestone (which include Level 3 inputs - see Note 3(e) and the Company's stock price (Level 1 input) as of the balance sheet date). These varying probabilities and assumptions and changes in the Company's stock price have required fair value adjustments of the Contingent Payment in periods subsequent to the Nellix Closing Date.

The Contingent Payment fair value will continue to be evaluated on a quarterly basis until milestone achievement occurs, or until the expiration of the "earn-out period," as defined within the Nellix purchase agreement. Adjustments to the fair value of the Contingent Payment are recognized within other income (expense) in the Condensed Consolidated Statements of Operations and Comprehensive Loss.

	Fair Value of Contingently Issuable Common Stock
December 31, 2014	$	14,600
Fair Value Adjustment of Contingent Payment for the nine months ended September 30, 2015	200
September 30, 2015	$	14,800

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Subsequent Events

9 Months Ended

Sep. 30, 2015

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

TriVascular Merger

On October 26, 2015, the Company entered into an agreement and plan of merger (the “Merger Agreement”), with TriVascular Technologies, Inc. (“TriVascular”) under which the Company agreed to acquire all of TriVascular’s outstanding capital stock through a merger of a direct wholly-owned subsidiary of the Company (“Merger Sub”) with and into TriVascular (the “TriVascular Merger”). TriVascular will survive the TriVascular Merger and become a wholly-owned subsidiary of the Company.

Under the terms and conditions of the Merger Agreement, at the effective time of the TriVascular Merger, all outstanding shares of capital stock of TriVascular will be cancelled and converted into the right to receive merger consideration with a value, based on the closing price of the Company’s common stock on October 23, 2015, equal to up to approximately $211 million at closing, subject to certain adjustments specified in the Merger Agreement (the “Merger Consideration”). Approximately $187 million of the Merger Consideration payable to TriVascular stockholders will be payable in shares of the Company’s common stock issued at closing. This represents the value of 19.999% of the Company’s common stock as of October 23, 2015. Subject to certain adjustments specified in the Merger Agreement, up to the remaining approximately $24 million of the Merger Consideration will be payable in cash at closing.

The Merger Agreement includes customary representations, warranties and covenants of the Company, TriVascular and Merger Sub. The Merger Agreement contains customary closing conditions, including the requisite consent to the adoption of the Merger Agreement by TriVascular’s stockholders and the expiration or termination of the waiting period (and any extension thereof) under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The consummation of the TriVascular Merger is not subject to a financing condition.

The Merger Agreement also includes customary termination provisions for both TriVascular and the Company, subject, in certain circumstances, to the payment by TriVascular or the Company of a termination fee of 3.0% or 4.5%, respectively, of the aggregate purchase price. TriVascular must pay the Company the 3.0% termination fee following a change of recommendation by the board of directors of TriVascular or if TriVascular terminates the Merger Agreement to enter into an agreement with respect to a proposal from a third party that the board of directors of TriVascular has determined in good faith in the exercise of its fiduciary duties is superior to the Company’s, in each case, as is described in further detail in the Merger Agreement. The Company must pay TriVascular the 4.5% termination fee if the Company is unable to obtain antitrust approval of the merger.

3.25% Convertible Senior Notes

On October 27, 2015, the Company entered into an underwriting agreement with respect to the offer and sale of $110 million aggregate principal amount of 3.25% Convertible Senior Notes due 2020 (the “3.25% Convertible Senior Notes”). The 3.25% Convertible Senior Notes bear interest at a rate of 3.25% per year, payable semi-annually on May 1 and November 1 of each year, commencing May 1, 2016. The 3.25% Convertible Senior Notes will mature on November 1, 2020, unless earlier purchased, redeemed or converted in accordance with the terms of the 3.25% Convertible Senior Notes. The indenture governing 3.25% Convertible Senior Notes will contain customary terms and covenants and events of default. The initial conversion rate of the 3.25% Convertible Senior Notes is 89.4314 shares of the Company’s common stock per $1,000 principal amount of 3.25% Convertible Senior Notes (which is equivalent to an initial conversion price of approximately $11.18 per share). The conversion rate is subject to adjustment upon the occurrence of certain specified events. Prior to August 1, 2020, the 3.25% Convertible Senior Notes will be convertible only upon the occurrence of certain events and during certain periods, and thereafter, at any time until the second scheduled trading day immediately preceding the maturity date. On or after November 1, 2018, the Company may redeem for cash all or any portion of the 3.25% Convertible Senior Notes, at the Company’s option, but only if the closing sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period ending on, and including, the second trading day immediately preceding the date on which the Company provide notice of redemption, exceeds 130% of the conversion price on each applicable trading day. The redemption price will equal 100% of the principal amount of the 3.25% Convertible Senior Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date.

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Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 38,231	$ 37,150	$ 114,380	$ 108,741
Geographic Concentration Risk | Sales
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 38,231	$ 37,150	$ 114,380	$ 108,741
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Geographic Concentration Risk | Sales | United States | Direct
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 26,915	$ 27,067	$ 80,825	$ 79,048
Concentration risk percentage	70.40%	72.90%	70.70%	72.70%
Geographic Concentration Risk | Sales | Europe
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 7,789	$ 6,937	$ 22,923	$ 21,337
Concentration risk percentage	20.40%	18.70%	20.00%	19.60%
Geographic Concentration Risk | Sales | Latin America | Distributor
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 1,908	$ 1,858	$ 5,168	$ 4,085
Concentration risk percentage	5.00%	5.00%	4.50%	3.80%
Geographic Concentration Risk | Sales | Asia/Pacific | Distributor
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 1,619	$ 1,288	$ 5,464	$ 4,271
Concentration risk percentage	4.20%	3.50%	4.80%	3.90%
Geographic Concentration Risk | Sales | Total ROW | Distributor
Schedule of Revenue by Geographic Region [Line Items]
Revenue	$ 3,527	$ 3,146	$ 10,632	$ 8,356
Concentration risk percentage	9.20%	8.50%	9.30%	7.70%

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Revenue by Geographic Region (Tables)

9 Months Ended

Sep. 30, 2015

Geographic Areas, Revenues from External Customers [Abstract]

Revenue by Geographic Region

The Company's revenue by geographic region, was as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
United States	$	26,915	70.4%	$	27,067	72.9%	$	80,825	70.7%	$	79,048	72.7%
Europe	$	7,789	20.4%	$	6,937	18.7%	$	22,923	20.0%	$	21,337	19.6%
Rest of World ("ROW"):
Latin America	$	1,908	5.0%	$	1,858	5.0%	$	5,168	4.5%	$	4,085	3.8%
Asia/Pacific	1,619		4.2%	1,288		3.5%	5,464		4.8%	4,271		3.9%
Total ROW	$	3,527	9.2%	$	3,146	8.5%	$	10,632	9.3%	$	8,356	7.7%
Revenue	$	38,231	100.0%	$	37,150	100.0%	$	114,380	100.0%	$	108,741	100.0%

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Balance Sheet Account Detail (Inventories) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Raw materials	$ 6,919	$ 6,728
Work-in-process	7,329	5,946
Finished goods	19,174	18,651
Inventories	$ 33,422	$ 31,325

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net loss	$ (35,131)	$ (17,636)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,561	1,938
Stock-based compensation	7,169	5,568
Change in fair value of contingent consideration related to acquisition	200	(8,228)
Accretion of interest on convertible note	2,645	2,453
Amortization of deferred financing costs	354	303
Non-cash foreign exchange (gain) loss	(593)	4,050
Changes in operating assets and liabilities:
Accounts receivable and other receivables	(1,343)	(1,343)
Inventories	(1,889)	(8,512)
Prepaid expenses and other current assets	148	(880)
Accounts payable	4,730	2,208
Accrued payroll	633	1,576
Accrued expenses and other liabilities	182	3,231
Net cash used in operating activities	(18,334)	(15,272)
Cash flows from investing activities:
Purchases of marketable securities	(52,420)	(107,454)
Maturities of marketable securities	79,340	64,820
Purchases of property and equipment	(3,572)	(9,902)
Net cash provided by (used in) investing activities	23,348	(52,536)
Cash flows from financing activities:
Proceeds from sale of common stock under employee stock purchase plan	2,787	1,446
Proceeds from exercise of stock options	1,631	1,596
Minimum tax withholding paid on behalf of employees for restricted stock units	(291)	(2,320)
Net cash provided by financing activities	4,127	722
Effect of exchange rate changes on cash and cash equivalents	(535)	(529)
Net increase (decrease) in cash and cash equivalents	8,606	(67,615)
Cash and cash equivalents, beginning of period	26,798	95,152
Cash and cash equivalents, end of period	35,404	27,537
Supplemental disclosure of cash flow information:
Cash paid for interest	976	1,047
Cash paid for income taxes	162	239
Non-cash investing and financing activities:
Landlord funded leasehold improvements	46	6,669
Fair value of Nellix Milestone Shares (note 9)	0	38,372
Acquisition of property and equipment included in accounts payable	$ 43	$ 2,351

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Net Loss Per Share

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Net Loss Per Share

Net Loss Per Share

Net loss per share was calculated by dividing net loss by the weighted average number of common shares outstanding for the three and nine months endedSeptember 30, 2015 and 2014.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net loss	$	(10,917	)	$	(13,938	)	$	(35,131	)	$	(17,636	)
Shares used in computing basic and diluted net loss per share	67,810			65,494			67,568			63,444
Basic and diluted net loss per share	$	(0.16	)	$	(0.21	)	$	(0.52	)	$	(0.28	)

The following outstanding Company securities, using the treasury stock method, were excluded from the above calculations of net loss per share because their impact would have been anti-dilutive:

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Common stock options	1,600	1,816	1,739	1,881
Restricted stock awards	135	240	133	360
Restricted stock units	207	162	247	191
Total	1,942	2,218	2,119	2,432

As discussed in Note 6, in December 2013, the Company issued $86.3 million in aggregate principal amount of 2.25% convertible senior notes due 2018 (the “Senior Notes”) in an underwritten public offering. Upon any conversion, the Senior Notes may be settled, at the Company’s election, in cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock. For purposes of calculating the maximum dilutive impact, it is presumed that the Senior Notes will be settled in common stock with the resulting potential common shares included in diluted earnings per share if the effect is more dilutive. The effect of the conversion of the Senior Notes is excluded from the calculation of diluted loss per share because the impact of these securities would be anti-dilutive. The potential dilutive effect of these securities is shown in the chart below:

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Conversion of the Notes	3,588	3,588	3,588	3,588

The effect of the contingently issuable common stock is excluded from the calculation of basic net loss per share until all necessary conditions for issuance have been satisfied. Refer to Note 9 of the Notes to the Condensed Consolidated Financial Statements for further discussion.

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Balance Sheet Account Detail (Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Goodwill	[1]	$ 28,731	$ 28,866
Total		39,570
Intangible assets (excluding goodwill), net		42,278	43,465
Developed technology
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles	[2]	40,100	40,100
Accumulated amortization		(620)	(285)
Total		39,480	39,815
License
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles		100	100
Accumulated amortization		(93)	(71)
Total		7	29
Customer relationships
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles	[1]	0	480
Accumulated amortization	[1]	0	(400)
Total		0	80
Acquired Shonin approval
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles	[3]	1,000	1,000
Accumulated amortization		(917)	(167)
Total		83	833
Trademarks and trade names
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Indefinite lived intangibles		$ 2,708	$ 2,708

[1] Difference in the value between these dates is solely due to a foreign currency translation adjustment.

[2] Was reclassified in the first quarter of 2013 from in-process research and development to finite lived intangibles, which coincided with the European commercial launch of the product (Nellix EVAS System) associated with this intangible asset. A significant portion of this intangible asset will not begin amortization until the U.S. launch of this product, currently scheduled for 2016.

[3] Regulatory approval for Intuitrak in Japan acquired through an amendment with a distributor in the fourth quarter of 2014.

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Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income tax (expense) benefit	$ 22	$ (346)	$ 175	$ (210)
Effective income tax rate	(0.20%)		(0.50%)
Federal statutory income tax rate	34.00%		34.00%

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Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

Net loss per share was calculated by dividing net loss by the weighted average number of common shares outstanding for the three and nine months endedSeptember 30, 2015 and 2014.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net loss	$	(10,917	)	$	(13,938	)	$	(35,131	)	$	(17,636	)
Shares used in computing basic and diluted net loss per share	67,810			65,494			67,568			63,444
Basic and diluted net loss per share	$	(0.16	)	$	(0.21	)	$	(0.52	)	$	(0.28	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following outstanding Company securities, using the treasury stock method, were excluded from the above calculations of net loss per share because their impact would have been anti-dilutive:

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Common stock options	1,600	1,816	1,739	1,881
Restricted stock awards	135	240	133	360
Restricted stock units	207	162	247	191
Total	1,942	2,218	2,119	2,432

As discussed in Note 6, in December 2013, the Company issued $86.3 million in aggregate principal amount of 2.25% convertible senior notes due 2018 (the “Senior Notes”) in an underwritten public offering. Upon any conversion, the Senior Notes may be settled, at the Company’s election, in cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock. For purposes of calculating the maximum dilutive impact, it is presumed that the Senior Notes will be settled in common stock with the resulting potential common shares included in diluted earnings per share if the effect is more dilutive. The effect of the conversion of the Senior Notes is excluded from the calculation of diluted loss per share because the impact of these securities would be anti-dilutive. The potential dilutive effect of these securities is shown in the chart below:

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Conversion of the Notes	3,588	3,588	3,588	3,588