Stockholders' Equity - Stock Based Compensation Expense (Details) - USD ($) $ in Thousands |
12 Months Ended | |
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Mar. 31, 2021 |
Mar. 31, 2020 |
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| Stock-Based Compensation | ||
| Stock-based compensation expense | $ 937 | $ 913 |
| Cost of goods sold | ||
| Stock-Based Compensation | ||
| Stock-based compensation expense | 83 | 69 |
| Research and development | ||
| Stock-Based Compensation | ||
| Stock-based compensation expense | 41 | 44 |
| Selling, general and administrative | ||
| Stock-Based Compensation | ||
| Stock-based compensation expense | $ 813 | $ 800 |
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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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