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Note K - Notes Payable and Long-term Debt - Schedule of Notes Payable and Long-term Debt (Details) (Parentheticals) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Nov. 16, 2022 | Sep. 28, 2017
Chailease Finance Co, Ltd. [Member] | Promissory Note [Member] |  |  |  |
Long-term debt, maturity date |  | Jan. 21, 2022 |  |
Long-term debt, interest |  | 3.10% |  |
Truist Bank [Member] | Revolving Credit Facility [Member] |  |  |  |
Long-term debt, maximum |  |  |  | $ 20,000
Truist Bank [Member] | Revolving Credit Facility [Member] | Fouth Amendment to Loan Agreement with Truist Bank [Member] |  |  |  |
Long-term debt, maximum |  | $ 20,000 |  |
Long-term debt, interest |  | 4.063% |  |
Long-term debt, maturity date |  | Nov. 16, 2022 |  |
CIT Northbridge Credit, LLC [Member] | Revolving Credit Facility [Member] | Loan Security and Guarantee Agreement [Member] |  |  |  |
Long-term debt, maximum | $ 27,800 |  | $ 27,780 |
Long-term debt, interest | 8.984% |  |  |
Long-term debt, start maturity date | Dec. 14, 2023 |  |  |
Long-term debt, end maturity date | Nov. 16, 2025 |  |  |
SPD Bank [Member] | Revolving Credit Facility [Member] |  |  |  |
Long-term debt, maximum | $ 19,902 | $ 19,902 |  |
Long-term debt, maturity date | May 24, 2024 | May 24, 2024 |  |
SPD Bank [Member] | Revolving Credit Facility [Member] | Minimum [Member] |  |  |  |
Long-term debt, interest | 2.95% | 2.95% |  |
SPD Bank [Member] | Revolving Credit Facility [Member] | Maximum [Member] |  |  |  |
Long-term debt, interest | 4.57% | 4.57% |  |
China Zheshang Bank Co., Ltd [Member] | Revolving Credit Facility [Member] | The ¥100M Credit Facility [Member] |  |  |  |
Long-term debt, maximum | $ 26,636 | $ 26,636 |  |
Long-term debt, maturity date | Jun. 07, 2027 | Jun. 07, 2027 |  |
China Zheshang Bank Co., Ltd [Member] | Revolving Credit Facility [Member] | The ¥100M Credit Facility [Member] | Minimum [Member] |  |  |  |
Long-term debt, interest | 4.45% | 4.45% |  |
China Zheshang Bank Co., Ltd [Member] | Revolving Credit Facility [Member] | The ¥100M Credit Facility [Member] | Maximum [Member] |  |  |  |
Long-term debt, interest | 6.60% | 6.60% |  |
China Zheshang Bank Co., Ltd [Member] | Revolving Credit Facility [Member] | The ¥50M Credit Facility [Member] |  |  |  |
Long-term debt, maximum | $ 7,167 | $ 7,167 |  |
Long-term debt, maturity date | Jun. 27, 2022 | Jun. 27, 2022 |  |
Long-term debt, interest | 5.70% | 5.70% |  |

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