Sale of Sumavel DosePro Business - Additional Information (Details) (USD $)	12 Months Ended			0 Months Ended	1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 16, 2014	May 31, 2014	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of business	$ 89,624,000	$ 0	$ 0
Imputed interest on working capital advance	5,297,000					5,297,000
Contract revenue	0	0	8,462,000
Long-term debt interest expense	2,750,000	5,672,000	6,708,000
Notes Payable, Other Payables [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Debt instrument, outstanding				7,000,000
Endo Ventures Supply Agreement [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Agreement termination notice period				3 years
Minimum quantity supply period				6 months
Imputed interest on working capital advance	4,748,000					4,748,000
Sumavel DosePro [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of business				85,000,000
Escrow deposit				8,500,000
Indemnification period				12 months	12 months
Revenue from finished goods inventory				4,624,000
Cost of goods sold mark-up, in percent				2.50%	2.50%
Contract receivable				9,100,000
Imputed interest on working capital advance				4,748,000
Deferred agreement payments	8,535,000			9,108,000		8,535,000
Net gain on sale of business	79,980,000			79,980,000
Transaction costs	660,000			660,000		660,000
Contract revenue	15,392,000
Sumavel DosePro [Member] | Purchasing Entity [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contingent consideration, additional cash payments				20,000,000
Contingent consideration asset				20,000,000
Sumavel DosePro [Member] | Notes Payable, Other Payables [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Debt instrument, outstanding				7,000,000
Imputed interest on working capital advance				4,748,000
Long-term debt interest expense	$ 209,000
Minimum [Member] | Endo Ventures Supply Agreement [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Term of agreement						8 years