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Balance Sheet Account Details (Tables)

12 Months Ended

Dec. 31, 2018

Other Balance Sheet Details [Abstract]

Schedule of Investment Categories

The following table summarizes the various investment categories at December 31, 2018 and 2017 (in thousands):

			Cost						Gross unrealized gains						Gross unrealized losses						Estimated fair value
December 31, 2018
Short-term investments
Bank deposits			$	311,066					$	26					$	(29)					$	311,063
Corporate bonds			53,223						1						(45)						53,179
Corporate equity securities			135						1,191						—						1,326
Commercial paper			225,731						8						(76)						225,663
U.S. Government bonds			7,982						—						(9)						7,973
Municipal bonds			2,017						—						(4)						2,013
			$	600,154					$	1,226					$	(163)					$	601,217
December 31, 2017
Short-term investments
Bank deposits			$	80,095					$	6					$	(42)					$	80,059
Corporate bonds			55,335						—						(96)						55,239
Corporate equity securities			207						1689						—						1,896
Commercial paper			27,933						—						(20)						27,913
Agency bonds			4,991						—						(1)						4,990
U.S. Government bonds			8,939						—						(10)						8,929
Municipal bonds			2,028						—						(13)						2,015
			$	179,528					$	1,695					$	(182)					$	181,041

Schedule of Other Current Assets

Other current assets consist of the following (in thousands):

			December 31,
			2018						2017
Restricted cash			$	2,616					$	—
Investment in Viking warrants			9,257						—
Other			8,545						1,514
			$	20,418					$	1,514

Schedule of Property and Equipment

Property and equipment is stated at cost and consists of the following (in thousands):

			December 31,
			2018						2017
Lab and office equipment			$	4,183					$	3,460
Leasehold improvements			2,418						1,917
Computer equipment and software			936						697
			7,537						6,074
Less accumulated depreciation and amortization			(2,165)						(1,862)
			$	5,372					$	4,212

Schedule of Goodwill and Other Identifiable Intangible Assets

Goodwill and identifiable intangible assets consist of the following (in thousands):

			December 31,
			2018						2017
Indefinite lived intangible assets
IPR&D			$	—					$	7,923
Goodwill			86,646						85,959
Definite lived intangible assets
Complete technology			235,413						222,900
Less: Accumulated amortization			(35,070)						(23,301)
Trade name			2,642						2,642
Less: Accumulated amortization			(1,048)						(916)
Customer relationships			29,600						29,600
Less: Accumulated amortization			(11,744)						(10,264)
Total goodwill and other identifiable intangible assets, net			$	306,439					$	314,543

Schedule of Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

			December 31,
			2018						2017
Compensation			$	4,045					$	4,085
Legal			942						430
Amounts owed to former licensees			428						396
Royalties owed to third parties			1,025						954
Payments due to broker for share repurchases			4,613						—
Return reserve			3,590						—
Restructuring			1,093						—
Other			3,464						1,512
			$	19,200					$	7,377

Schedule of Contingent Liabilities

The following table summarizes contingent liabilities as of December 2018 and 2017 (in thousands):

			December 31, 2016			Payments			Fair Value Adjustment						Additions			December 31, 2017			Payments			Fair Value Adjustment			December 31, 2018
Cydex			$	6,600		$	(5,000)		$	—					$	—		$	1,600		$	(25)		$	(1,050)		$	525
Metabasis			$	1,500		$	—		$	2,500					$	—		$	4,000		$	(3,900)		$	5,400		$	5,500
Crystal			$	—		$	—		$	—					$	8,400		$	8,400		$	(1,000)		$	(924)		$	6,476
Total			$	8,100		$	(5,000)		$	2,500					$	8,400		$	14,000		$	(4,925)		$	3,426		$	12,501

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