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Note 10 - Property, Plant and Equipment | 9 Months Ended
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Dec. 31, 2021
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] | 10. Property, Plant and Equipment The cost and accumulated depreciation of property, plant and equipment at December 31, 2021 and March 31, 2021 are as follows (in thousands):
|  | December 31, 2021 |  |  | March 31, 2021 |
Construction in progress - equipment |  | $ | 506 |  |  | $ | 220 |
Land |  |  | 980 |  |  |  | 270 |
Building |  |  | 5,270 |  |  |  | 1,630 |
Equipment and software |  |  | 43,721 |  |  |  | 41,652 |
Finance lease - right of use asset |  |  | 9 |  |  |  | — |
Furniture and fixtures |  |  | 1,381 |  |  |  | 1,333 |
Leasehold improvements |  |  | 6,594 |  |  |  | 6,308 |
Property, plant and equipment, gross |  |  | 58,461 |  |  |  | 51,413 |
Less accumulated depreciation |  |  | (44,343 | ) |  |  | (42,416 | )
Property, plant and equipment, net |  | $ | 14,118 |  |  | $ | 8,997 |
Depreciation expense was $0.7 million and $1.2 million for the three months ended December 31, 2021 and 2020, respectively. Depreciation expense was $2.0 million and $2.9 million for the nine months ended December 31, 2021 and 2020, respectively. The increase in land and building relates to the property added as part of the Neeltran Acquisition.

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