Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.20.4
Commitments and Contingencies - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
Other Commitments [Line Items]  
Upfront fees unamortized balance included in prepaid asset $ 1.1
Contractual obligation $ 49.0
Percentage of right to share development costs exercised 50.00%
Minimum  
Other Commitments [Line Items]  
Estimated purchase obligation $ 13.2
Maximum  
Other Commitments [Line Items]  
Estimated purchase obligation $ 13.9