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v3.21.2

Note F - Property, Plant and Equipment (Details Textual) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2021 USD ($) | Sep. 30, 2021 USD ($) | May 25, 2021 USD ($) ft² a | Mar. 31, 2021 USD ($)
Construction in Progress, Gross | $ 5,994,357 | $ 5,994,357 |  | $ 9,614
Accumulated Depreciation, Depletion and Amortization, Wrote-off | 115,578 | 2,060,226 |  |
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance | 25,340,164 | 25,340,164 |  | $ 30,180,893
Facility in Sinton, Texas [Member] |  |  |  |
Area of Land (Acre) | a |  |  | 26.5 |
Lessee, Operating Lease, Term of Contract (Year) |  |  | 99 years |
Capital Expenditures, Expected Cost |  |  | $ 21,000,000 |
Construction in Progress, Gross | 5,994,357 | 5,994,357 |  |
Payments for Construction in Process |  | 2,760,289 |  |
Construction in Progress Expenditures Incurred but Not yet Paid |  | 3,234,068 |  |
Facility in Sinton, Texas [Member] |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  | 70,000 |
Decatur Facility Equipment [Member] |  |  |  |
Proceeds from Sale of Machinery and Equipment |  | 160,542 |  |
Property, Plant and Equipment, Gross, Ending Balance | 3,604,209 | 3,604,209 |  |
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance | $ 3,447,465 | $ 3,447,465 |  |

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