XML 46 R35.htm IDEA: XBRL DOCUMENT v3.19.1
Fair Value Measurements and Short-Term Investments - Narrative (Details)
$ in Millions
Mar. 31, 2019
USD ($)
year
Contingent Royalty Obligation | Measurement Input, Expected Term  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Measurement input | year 10
Contingent Royalty Obligation | Measurement Input, Discount Rate | Minimum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Measurement input 0.160
Contingent Royalty Obligation | Measurement Input, Discount Rate | Maximum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Measurement input 0.250
Estimate of Fair Value Measurement  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Contingent promissory note payable | $ $ 14.8