Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v3.22.1
Subsequent Events - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2017
Mar. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Feb. 28, 2022
Subsequent Event [Line Items]          
Total revenue     $ 38,697,000 $ 18,845,000  
Takeda Multi Target Agreement          
Subsequent Event [Line Items]          
Upfront payment $ 5,000,000.0        
Takeda Multi Target Agreement | Subsequent Event          
Subsequent Event [Line Items]          
Outstanding performance obligations, payments         $ 0
Takeda Multi Target Agreement | Subsequent Event | Research And Development Revenue          
Subsequent Event [Line Items]          
Total revenue   $ 2,600,000