Quarterly report pursuant to Section 13 or 15(d)

Contractual Commitments - Additional Information (Detail)

v3.20.1
Contractual Commitments - Additional Information (Detail)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
Other Commitments [Line Items]  
Upfront fees unamortized balance included in prepaid asset $ 2.6
Contractual obligation $ 43.2
Percentage of right to share development costs exercised 50.00%
Minimum  
Other Commitments [Line Items]  
Estimated purchase obligation $ 14.3
Maximum  
Other Commitments [Line Items]  
Estimated purchase obligation $ 15.0