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Note 9 - Property, Plant and Equipment | 12 Months Ended
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Mar. 31, 2024
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] | 9. Property, Plant and Equipment The cost and accumulated depreciation of property, plant and equipment at March 31, 2024 and 2023 are as follows (in thousands):
|  | March 31, 2024 |  |  | March 31, 2023 |
Land |  | $ | 980 |  |  | $ | 980 |
Construction in progress - equipment |  |  | 226 |  |  |  | 748 |
Buildings |  |  | 5,416 |  |  |  | 5,416 |
Equipment and software |  |  | 44,095 |  |  |  | 43,156 |
Finance lease - right of use asset |  |  | — |  |  |  | 1 |
Furniture and fixtures |  |  | 1,526 |  |  |  | 1,535 |
Leasehold improvements |  |  | 6,990 |  |  |  | 6,815 |
Property, plant and equipment, gross |  |  | 59,233 |  |  |  | 58,651 |
Less accumulated depreciation |  |  | (48,372 | ) |  |  | (46,342 | )
Property, plant and equipment, net |  | $ | 10,861 |  |  | $ | 12,309 |
Depreciation expense was $2.3 million and $2.6 million, for the fiscal years ended March 31, 2024 and 2023, respectively.

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