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v3.23.2

Note 6 - Property, Plant and Equipment (Details Textual) | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($) | Oct. 31, 2022 USD ($) | May 25, 2021 ft² a
Buildings and Improvements, Gross | $ 28,550,000 | $ 8,582,000 |  |
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment | 28,455,000 | 26,003,000 |  |
Tangible Asset Impairment Charges | 0 |  |  |
Depreciation | 2,526,000 | 1,320,000 |  |
Property, Plant and Equipment, Disposals | $ 0 |  |  |
Facility in Sinton, Texas [Member] |  |  |  |
Area of Land (Acre) | a |  |  |  | 26.5
Lessee, Operating Lease, Term of Contract (Year) |  |  |  | 99 years
Facility in Sinton, Texas [Member] |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  |  | 70,000
Capitalized Property Plant and Equipment [Member] |  |  |  |
Buildings and Improvements, Gross |  |  | $ 22,200 |
Decatur Facility Equipment [Member] |  |  |  |
Accumulated Depreciation, Depletion and Amortization, Wrote-off |  | 2,100,000 |  |
Proceeds from Sale of Machinery and Equipment |  | 200,000 |  |
Property, Plant and Equipment, Gross |  | 3,600,000 |  |
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment |  | $ 3,400,000 |  |

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