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Note 5 - Supplemental Balance Sheets Information (Tables) | 6 Months Ended
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Sep. 30, 2023
Notes Tables |
Schedule of Inventory, Current [Table Text Block] |
|  | September 30, 2023 |  |  | March 31, 2023 |
Raw materials |  | $ | 20,203 |  |  | $ | 20,064 |
Work in process |  |  | 633 |  |  |  | 617 |
Finished goods |  |  | 12,043 |  |  |  | 13,961 |
Total inventories |  | $ | 32,879 |  |  | $ | 34,642 |
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] |
|  | September 30, 2023 |  |  | March 31, 2023 |
Prepaid expenses |  | $ | 3,494 |  |  | $ | 2,498 |
Deposits |  |  | 1,563 |  |  |  | 1,376 |
Prepaid income taxes |  |  | 3,534 |  |  |  | 953 |
Other current assets |  |  | 4,235 |  |  |  | 4,045 |
Total prepaid expenses and other |  | $ | 12,826 |  |  | $ | 8,872 |
Schedule of Employee Related Liabilities [Table Text Block] |
|  | September 30, 2023 |  |  | March 31, 2023 |
Bonus payable |  | $ | 3,317 |  |  | $ | 4,461 |
Wages and paid-time-off payable |  |  | 2,139 |  |  |  | 2,329 |
Payroll related taxes |  |  | 1,854 |  |  |  | 1,982 |
Other benefits payable |  |  | 1,043 |  |  |  | 661 |
Total accrued payroll and benefits |  | $ | 8,353 |  |  | $ | 9,433 |
Schedule of Accrued Liabilities [Table Text Block] |
|  | September 30, 2023 |  |  | March 31, 2023 |
Accrued business taxes |  | $ | 6,079 |  |  | $ | 5,941 |
Current operating lease liabilities |  |  | 2,784 |  |  |  | 2,868 |
Income taxes payable |  |  | 343 |  |  |  | 992 |
Other |  |  | 3,131 |  |  |  | 2,297 |
Total other accrued expenses |  | $ | 12,337 |  |  | $ | 12,098 |

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