Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of stock option activity (Detail)

v3.19.3.a.u2
Stock-Based Compensation - Summary of stock option activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Dec. 31, 2019
Mar. 31, 2019
Share-based Payment Arrangement [Abstract]    
Number of options, beginning balance 189,269  
Number of options, granted 4,590,731  
Number of options, Cancelled (570,427)  
Number of options, ending balance 4,209,573 189,269
Number of options, Exercisable 169,275  
Weighted average exercise price, beginning balance $ 4.12  
Weighted average exercise price, granted 8.04  
Weighted average exercise price, forfeited 7.13  
Weighted average exercise price, ending balance 7.86 $ 4.12
Weighted average exercise price, exercisable $ 6.93  
Remaining contractual term 9 years 6 months 9 years 7 months 20 days
Remaining contractual term, exercisable 7 years 4 months 24 days  
Aggregate Intrinsic Value, beginning balance $ 707  
Aggregate Intrinsic Value, ending balance 33,177 $ 707
Aggregate Intrinsic Value, exercisable $ 1,514