Concentration of Credit Risk (Tables)

3 Months Ended

Mar. 31, 2016

Concentration of Credit Risk

Schedule of concentration of credit risk related to collaborative partners

	Percentage of Total
	Contract Revenues for the
	Three Months Ended
	March 31,
	2016		2015
Collaboration Partner A	—	%	89	%
Collaboration Partner B	100	%	11	%

Schedule of concentration of credit risk related to specialty pharmacy customers

	Percentage of Total Net
	Product Revenues for the
	Three Months Ended
	March 31,
	2016		2015
Customer A	27	%	28	%
Customer B	18	%	20	%
Customer C	12	%	13	%
Customer D	8	%	8	%