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v3.23.2

Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 30, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022
Derivative, Gain (Loss) on Derivative, Net |  | $ (9,900,000) |  | $ 9,306,000 | $ (11,636,000)
Accounts Receivable, Allowance for Credit Loss |  |  |  | 200,000 | 100,000
Gain (Loss) on Extinguishment of Debt |  |  |  | (0) | 1,707,000
Interest Paid, Including Capitalized Interest, Operating and Investing Activities |  |  |  | 2,000,000.0 | 200,000
Income Taxes Paid, Net |  |  |  | 400,000 | 8,300,000
Proceeds from Income Tax Refunds |  |  |  |  | 400,000
Construction in Progress, Gross |  |  |  | 1,167,000 | 15,925,000
Capital Expenditures Incurred but Not yet Paid |  |  |  |  | $ 8,100,000
Transfer of Ownership of Life Insurance Policy |  |  |  | 31,000 |
Unrecognized Tax Benefits, Ending Balance |  |  |  | $ 0 |
Customer Concentration Risk [Member] | Revenue, Product and Service Benchmark [Member] | O'Neal Steel [Member] |  |  |  |  |
Concentration Risk, Percentage |  |  |  | 15.00% | 11.00%
Plateplus Inc. [Member] |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | 516,041 |  |  | 516,041 |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable |  |  | $ 4,800,000 | $ 4,800,000 |
Life Insurance Policies Transfer [Member] |  |  |  |  |
Liability, Other Retirement Benefits |  |  |  | 100,000 | $ 100,000
Other Income [Member] |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  | $ 1,700,000
Reclassified from Other income (loss) to Gain (loss) on Economic Hedges of Risk [Member] |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  |  |  | $ (11,600,000) |

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