Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of share based compensation expense (Detail)

v3.19.3.a.u2
Stock-Based Compensation - Summary of share based compensation expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 1,332 $ 12 $ 4,988 $ 13
Research and Development Expense [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense 311 10 2,680 11
General and Administrative Expense [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 1,021 $ 2 $ 2,308 $ 2