Annual report pursuant to Section 13 and 15(d)

Collaborative, Licensing and Other Arrangements - Sale of Future Revenue Streams - Additional Information (Details)

v3.6.0.2
Collaborative, Licensing and Other Arrangements - Sale of Future Revenue Streams - Additional Information (Details)
12 Months Ended
Dec. 21, 2016
USD ($)
Dec. 31, 2016
USD ($)
Agreement
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Deferred revenue   $ 18,000,000
HCRP [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Number of royalty Interest acquisition agreements | Agreement   2
Deferred revenue   $ 18,000,000
Deferred revenue recognized   $ 0
HCRP [Member] | First Acquisition Agreement [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Upfront cash payment received $ 6,500,000  
Eligible potential additional payments receivable upon achievement of specified net sales milestones in 2017, 2018 and 2019 4,000,000  
HCRP [Member] | Second Acquisition Agreement [Member]    
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]    
Upfront cash payment received $ 11,500,000