Acquisition of Brabant - Additional Information (Details) (Brabant Pharma Limited [Member], USD $)	0 Months Ended
	Oct. 24, 2014	Oct. 24, 2014
Business Acquisition [Line Items]
Cash paid in purchase	$ 20,000,000
Additional consideration to acquire businesses	8,718,000
Escrow deposit	2,000,000	2,000,000
Indemnification period	6 months
Issuance of common stock in conjunction with acquisition, shares	11,995,202
Aggregate amount of contingent liabilities	95,000,000
Aggregate purchase price	88,200,000
Issuance of common stock in conjunction with acquisition	15,234,000	15,234,000
Contingent purchase consideration for milestones	53,000,000	53,000,000
Transaction costs	300,000
Contingent Consideration [Member]
Business Acquisition [Line Items]
Contingent purchase consideration for milestones	$ 53,000,000	$ 53,000,000
Contingent Consideration [Member] | Minimum [Member]
Business Acquisition [Line Items]
Discount rate (percent)	3.10%
Contingent Consideration [Member] | Maximum [Member]
Business Acquisition [Line Items]
Discount rate (percent)	7.90%