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Accounting Principles and Practices (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Business Acquisition [Line Items] |  |  |
Document Fiscal Year (linked throughout the document) - not tagged | 2021 |  |
Advertising Expense | $ 999 | $ 1,648 | $ 2,452
Movement in Standard Product Warranty Accrual [Roll Forward] |  |  |
Balance at beginning of year | 3,581 | 3,634 |
Accrual for warranties issued | 2,319 | 2,723 |
Warranties settled | (2,778) | (2,548) |
Balance at end of year | $ 3,328 | $ 3,581 | $ 3,634

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