Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands		1 Months Ended		2 Months Ended	3 Months Ended		12 Months Ended
	May 16, 2014	Dec. 31, 2014	May 31, 2014	Mar. 09, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2016 USD ($) customer subassembly segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Concentration Risk [Line Items]
Loss on sale of investments							$ 5,746
Trade accounts receivable							$ (11,181)	$ 7,477	$ (2,212)
Period to accept returned unused product after product expiration							1 year
Contract manufacturing revenue							$ 28,525	24,369	15,392
Number of operating segments | segment							1
Trade accounts receivable					$ 12,577		$ 12,577	1,396
Zohydro ER [Member]
Concentration Risk [Line Items]
Restricted cash and cash equivalents					10,002		$ 10,002
Potential indemnification period			12 months
Impairment charges						$ 5,485
Sumavel DosePro [Member]
Concentration Risk [Line Items]
Restricted cash and cash equivalents								$ 8,500
Impairment charges					8,431				$ 838
Cost of goods sold mark-up, in percent	2.50%
Contract Manufacturing [Member] | Sales Revenue, Product Line [Member]
Concentration Risk [Line Items]
Number of customers | customer							1
Sumavel DosePro [Member]
Concentration Risk [Line Items]
Period to accept returned unused product after product expiration							1 year
Period to accept returned unused product before expiration							6 months
Product shelf life							30 months
Number of subassemblies | subassembly							2
Zohydro ER and Sumavel DosePro [Member]
Concentration Risk [Line Items]
Period to accept returned unused product after product expiration							12 months
Period to accept returned unused product before expiration							6 months
Endo Ventures Supply Agreement [Member]
Concentration Risk [Line Items]
Contract manufacturing revenue					4,900
Endo Ventures Supply Agreement [Member] | Minimum [Member]
Concentration Risk [Line Items]
Term of agreement		8 years
Other Current Assets [Member]
Concentration Risk [Line Items]
Receivables from unsettled sales of short-term investments					498		$ 498
Endo [Member]
Concentration Risk [Line Items]
Trade accounts receivable					12,600		$ 12,600
Subsequent Event [Member] | Endo [Member]
Concentration Risk [Line Items]
Trade accounts receivable				$ 10,100
Long Lived Assets, Production [Member] | Sumavel DosePro [Member]
Concentration Risk [Line Items]
Impairment charges					$ 6,400