Balance Sheet Account Detail (Tables)

9 Months Ended

Sep. 30, 2016

Balance Sheet Related Disclosures [Abstract]

Property and Equipment

Property and equipment consisted of the following:

	September 30, 2016			December 31, 2015
Production equipment, molds, and office furniture	$	14,732		$	13,603
Computer hardware and software	7,392			6,380
Leasehold improvements	15,495			14,345
Construction in progress (software and related implementation, production equipment, and leasehold improvements)	1,380			510
Property and equipment, at cost	$	38,999		$	34,838
Accumulated depreciation	(14,840		)	(11,483		)
Property and equipment, net	$	24,159		$	23,355

Schedule of Inventories

Inventories consisted of the following:

	September 30, 2016		December 31, 2015
Raw materials	$	11,721	$	7,701
Work-in-process	10,473		4,355
Finished goods	21,193		15,804
Total Inventories	$	43,387	$	27,860

Schedule of Goodwill and Intangible Assets

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

	September 30, 2016			December 31, 2015
Goodwill (1)	$	120,917		$	28,685
Intangible assets:
Indefinite lived intangibles
Trademarks and trade names	$	2,708		$	2,708
In-process research and development (1)	11,200			—
Finite lived intangibles
Developed technology (1)	$	67,600		$	40,100
Accumulated amortization	(2,773		)	(690		)
Developed technology, net	$	64,827		$	39,410
License	$	100		$	100
Accumulated amortization	(100		)	(100		)
License, net	$	—		$	—
Customer relationships (1)	$	7,500		$	—
Accumulated amortization	(500		)	—
Customer relationships, net	$	7,000		$	—
Intangible assets (excluding goodwill), net	$	85,735		$	42,118

(1) Difference in the value between these dates is mainly due to acquisition of TriVascular. Refer to Note 12 of the condensed consolidated financial statements for further discussion.

Schedule of Estimated Amortization Expense

Estimated amortization expense for the five succeeding years and thereafter is as follows:

Remainder of 2016	$	951
2017	4,023
2018	5,255
2019	6,801
2020	8,044
2021 & Thereafter	46,753
Total	$	71,827

Schedule of Investments in Marketable Securities

Investments in held-to-maturity marketable securities consist of the following at September 30, 2016 and December 31, 2015:

	September 30, 2016
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Agency bonds	$	10,484	$	5	$	—		$	10,489
Corporate bonds	10,521		—		(17		)	10,504
Commercial paper	3,977		—		—			3,977
Government securities	13,992		5		—			13,997
Total	$	38,974	$	10	$	(17	)	$	38,967
	December 31, 2015
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Agency bonds	$	8,000	$	—	$	(20	)	$	7,980
Corporate bonds	40,824		1		(33		)	40,792
Commercial paper	3,944		—		—			3,944
Total	$	52,768	$	1	$	(53	)	$	52,716

Schedule of Assets and Liabilities Measured at Fair Value

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, 2016 and December 31, 2015:

	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, 2016
Cash and cash equivalents	$	22,022	$	—	$	—	$	22,022
Restricted cash	$	2,001	$	—	$	—	$	2,001
Contingently issuable common stock	$	—	$	—	$	14,800	$	14,800
At December 31, 2015
Cash and cash equivalents	$	124,553	$	—	$	—	$	124,553
Contingently issuable common stock	$	—	$	—	$	14,700	$	14,700