Stock-Based Compensation - Summary of share based compensation expense (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
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Mar. 31, 2020 |
Mar. 31, 2019 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Stock-based compensation expense | $ 6,788 | $ 31 |
| Research and Development Expense [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Stock-based compensation expense | 3,125 | 29 |
| General and Administrative Expense [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Stock-based compensation expense | $ 3,663 | $ 2 |
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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