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Note O - Supplemental Cash Flow Information (Details Textual) - USD ($) |  | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Apr. 30, 2022 | Dec. 31, 2022 | Jun. 30, 2022 | Sep. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Interest Paid, Excluding Capitalized Interest, Operating Activities |  |  |  |  | $ 1,316,000 | $ 154,000
Income Taxes Paid, Net, Total |  |  |  |  | 428,000 | 7,487,000
Proceeds from Income Tax Refunds |  |  |  |  |  | $ 423,000
Capital Expenditures Incurred but Not yet Paid |  |  |  |  | 7,448,000 |
Transfer of Ownership of Life Insurance Policy |  | $ 31,000 |  |  |  |
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 |  |  | $ 4,783,700 | $ 4,783,700 | $ 4,800,000 |

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