Summary of Significant Accounting Policies - Additional Information (Details) (USD $)	3 Months Ended		9 Months Ended			0 Months Ended
	Sep. 30, 2014 segment	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2009	May 16, 2014 Sumavel DosePro	Sep. 30, 2014 Sumavel DosePro
Line of Credit Facility [Line Items]
Cost of goods sold mark-up, in percent						2.50%
Restricted Cash and Cash Equivalents							$ 8,500,000
Line of Credit Facility, Maximum Borrowing Capacity					200,000
Impairment of long-lived assets	$ 0	$ 0	$ 838,000	$ 0
Number of business segments	1