Balance Sheet Account Details - Contingent Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Contingent Liability [Roll Forward]
Commercial rights at beginning of period	$ 12,542	$ 13,961
Payments	(3,050)	(4,885)
Fair Value Adjustment	(30)	3,466
Repurchases	(520)
Commercial rights at end of period	8,942	12,542
Cydex
Contingent Liability [Roll Forward]
Commercial rights at beginning of period	514	1,589
Payments	(50)	(25)
Fair Value Adjustment	(116)	(1,050)
Repurchases	0
Commercial rights at end of period	348	514
Metabasis
Contingent Liability [Roll Forward]
Commercial rights at beginning of period	5,551	3,971
Payments	0	(3,860)
Fair Value Adjustment	904	5,440
Repurchases	(520)
Commercial rights at end of period	5,935	5,551
Crystal
Contingent Liability [Roll Forward]
Commercial rights at beginning of period	6,477	8,401
Payments	(3,000)	(1,000)
Fair Value Adjustment	(818)	(924)
Repurchases	0
Commercial rights at end of period	$ 2,659	$ 6,477