Contract Manufacturing Agreement with Endo and Associated Exit Activities - Additional Information (Details) - USD ($)	1 Months Ended		3 Months Ended			12 Months Ended
	Sep. 30, 2017	May 31, 2014	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain on sale of business						$ 0	$ 0	$ 89,484,000
Imputed interest on working capital advance					$ 3,733,000	0	3,733,000
Impairment charges								0
Inventory write-down						2,232,000	0	0
Contract termination costs						$ 478,000	$ 0	$ 0
Notes Payable, Other Payables [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Principal balance outstanding		$ 7,000,000
Endo Asset Purchase Agreement [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Term of agreement		8 years
Imputed interest on working capital advance		$ 4,700,000
Sumavel DosePro [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Inventory write-down			$ 2,200,000
Cash reimbursement for portion of termination costs incurred	$ 1,500,000
Accounts receivable	4,700,000
Cost of raw materials	2,300,000
Working capital notes payable	7,000,000
Loss on contract termination	500,000
Sumavel DosePro [Member] | Long Lived Assets, Production [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges				$ 800,000	6,400,000
Prepaid Royalties [Member] | Sumavel DosePro [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)					$ 2,000,000
Contract Termination [Member] | Sumavel DosePro [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contract termination costs	$ 2,500,000
Minimum [Member] | Endo Asset Purchase Agreement [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Term of agreement		8 years