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v3.21.2

Note 5 - Property, Plant and Equipment (Details Textual) | 12 Months Ended |
--- | --- | ---
Mar. 31, 2021 USD ($) ft² | Mar. 31, 2020 USD ($) | May 25, 2021 USD ($) ft² a
Number of Capital Expenditure Projects | 2 |  |
Impairment of Long-Lived Assets Held-for-use |  | $ 4,338,419 |
Property, Plant and Equipment, Net, Ending Balance | $ 15,461,256 | 11,500,556 |
Subsequent Event [Member] | Facility in Sinton, Texas [Member] |  |  |
Area of Land (Acre) | a |  |  | 26.5
Lessee, Operating Lease, Term of Contract (Year) |  |  | 99 years
Building [Member] |  |  |
Area of Real Estate Property (Square Foot) | ft² | 22,000 |  |
Payments to Acquire Productive Assets, Total | $ 1,083,000 |  |
Capital Expenditures Incurred but Not yet Paid | 1,100,000 |  |
Equipment [Member] |  |  |
Payments to Acquire Productive Assets, Total | 6,733,000 |  |
Capital Expenditures Incurred but Not yet Paid | 7,200,000 |  |
Facility in Sinton, Texas [Member] | Subsequent Event [Member] |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  | 70,000
Capital Expenditures, Expected Cost |  |  | $ 21,000,000
Pipe Finishing Facility [Member] | Tubular [Member] |  |  |
Impairment of Long-Lived Assets Held-for-use | 4,338,419 |  |
Property, Plant and Equipment, Net, Ending Balance | $ 1,771,450 | $ 1,771,450 |

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