Sale of Zohydro ER business - Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Apr. 24, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets of discontinued operations	$ 208		$ 7,196
Total current liabilities of discontinued operations	2,906		22,307
Zohydro ER [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Trade accounts receivable	4		2,799
Inventory	15		1,995
Prepaid expenses and other current assets	189		2,402
Total current assets of discontinued operations	208		7,196
Other assets	0		2,673
Total assets of discontinued operations	208	$ 2,515	9,869
Accounts payable	0		3,781
Accrued expenses	2,796		9,470
Accrued compensation	0		1,933
Deferred revenue	110		7,123
Total current liabilities of discontinued operations	2,906		22,307
Total liabilities of discontinued operations	$ 2,906		$ 22,307