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Note 22 - Legal Proceedings (Details Textual) - USD ($) |  | 1 Months Ended |
--- | --- | --- | ---
Mar. 16, 2021 | Mar. 31, 2022 | Feb. 28, 2022 | Dec. 31, 2021
Benchmark Investments, Inc. v. Yunhong CTI Ltd [Member] |  |  |  |
Loss Contingency, Damages Sought, Value | $ 500,000 |  |  |
Loss Contingency Accrual, Ending Balance |  |  |  | $ 0
Engie Resources LLC Case [Member] | Subsequent Event [Member] |  |  |  |
Loss Contingency Accrual, Payments |  |  | $ 94,000 |
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Total |  | $ 75,000 |  |

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