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v3.25.1

Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Cost of Product and Service Sold | $ 441,815 | $ 491,733
Accounts Receivable, Allowance for Credit Loss | 100 | 100
Interest Paid, Including Capitalized Interest, Operating and Investing Activities | 3,000 | 3,000
Proceeds from Income Tax Refunds | 3,200 | $ 3,900
Unrecognized Tax Benefits, Ending Balance | $ 0 |
Customer Concentration Risk [Member] | Revenue, Product and Service Benchmark [Member] | O'Neal Steel [Member] |  |
Concentration Risk, Percentage | 16.00% | 16.00%
Life Insurance Policies Transfer [Member] |  |
Liability, Other Retirement Benefits | $ 100 | $ 100
Material Sold Expense [Member] |  |
Cost of Product and Service Sold | 365,648 | 412,395
Processing and Warehouse Expense [Member] |  |
Cost of Product and Service Sold | $ 33,477 | 31,438
Revision of Prior Period, Adjustment [Member] | Material Sold Expense [Member] |  |
Cost of Product and Service Sold |  | (4,700)
Revision of Prior Period, Adjustment [Member] | Processing and Warehouse Expense [Member] |  |
Cost of Product and Service Sold |  | $ 4,700

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