Sale of Zohydro ER business - Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets of discontinued operations	$ 0	$ 208
Total current liabilities of discontinued operations	414	2,906
Zohydro ER [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Trade accounts receivable	0	4
Inventory	0	15
Prepaid expenses and other current assets	0	189
Total current assets of discontinued operations	0	208
Accrued expenses	414	2,796
Deferred revenue	0	110
Total current liabilities of discontinued operations	$ 414	$ 2,906