Quarterly report pursuant to Section 13 or 15(d)

Contractual Commitments - Additional Information (Detail)

v3.20.2
Contractual Commitments - Additional Information (Detail)
$ in Millions
9 Months Ended
Sep. 30, 2020
USD ($)
Other Commitments [Line Items]  
Upfront fees unamortized balance included in prepaid asset $ 1.3
Contractual obligation $ 16.4
Percentage of right to share development costs exercised 50.00%
Minimum  
Other Commitments [Line Items]  
Estimated purchase obligation $ 11.2
Maximum  
Other Commitments [Line Items]  
Estimated purchase obligation $ 12.1