Summary of Significant Accounting Policies - Summary of Property Plant and Equipment Estimated Useful Lives (Detail) |
12 Months Ended |
|---|---|
Mar. 31, 2021 | |
| Computer and software [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated Useful Lives | 3 years |
| Laboratory equipment and software [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated Useful Lives | 5 years |
| Furniture and office equipment [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated Useful Lives | 5 years |
| Leasehold improvements [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated Useful Lives | Shorter of remaining lease term or estimated useful life |