Allergan In-Licensing Agreement (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Commercial Launch Milestones			$ 27,593
Research and development			14,649	$ 21,288	$ 5,123
Warner Chilcott, now a subsidiary of Allergan, Inc. (Allergan)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Regulatory milestones			1,500
Commercial Launch Milestones			$ 25,000
Warner Chilcott, now a subsidiary of Allergan, Inc. (Allergan) | Vitaros
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Proceeds from licensing agreement	$ 1,000
Research and development		$ 1,050