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Note C - Inventories - Summary of Inventory Values by Product Group (Details) - USD ($) | Sep. 30, 2021 | Mar. 31, 2021
--- | --- | ---
Inventories | $ 67,737,618 | $ 36,016,093
Prime Coil Inventory [Member] |  |
Raw materials | 55,050,920 | 23,079,012
Non-standard Coil Inventory [Member] |  |
Raw materials | 1,307,105 | 1,419,055
Tubular Inventory [Member] |  |
Raw materials | 6,596,781 | 2,607,197
Finished Goods | $ 4,782,812 | $ 8,910,829

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