Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Details)

v3.20.4
Subsequent Events - Additional Information (Details) - Subsequent Events - USD ($)
$ in Thousands
1 Months Ended
Feb. 28, 2021
Jan. 31, 2021
WuXi Advanced Therapies | Wuxi Agreement    
Subsequent Event [Line Items]    
Early termination fee   $ 1,500
CHOP | Research Service Agreement    
Subsequent Event [Line Items]    
Total cost $ 670