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Note K - Notes Payable and Long-term Debt - Schedule of Notes Payable and Long-term Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Long-term debt | $ 54,711 | $ 52,187
Less debt issuance costs, net | 22 | 18
Grand total | 54,689 | 52,169
Less current portion | 49,689 | 38,265
Non-current portion | 5,000 | 13,904
Bank acceptance notes issued to vendors with a zero percent interest rate | 8,198 | 15,860
Chailease Finance Co, Ltd. [Member] | Promissory Note [Member] |  |
Long-term debt | 0 | 1,941
Chailease Finance Co, Ltd. [Member] | Promissory Note 2 [Member] |  |
Long-term debt | 170 | 2,149
Paycheck Protection Program, CARES Act [Member] |  |
Long-term debt | 0 | 6,229
Truist Bank [Member] | Revolving Credit Facility [Member] | Fouth Amendment to Loan Agreement with Truist Bank [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |
Long-term debt | 0 | 18,700
Truist Bank [Member] | Revolving Credit Facility [Member] | Sixth Amendment to Loan Agreement with Truist Bank [Member] | Secured Overnight Financing Rate (SOFR) [Member] |  |
Long-term debt | 14,373 | 0
Taishin International Bank [Member] | Revolving Credit Facility [Member] | Credit Facility [Member] |  |
Long-term debt | 0 | 1,756
China Merchants Bank Co, Ltd [Member] | Revolving Credit Facility [Member] |  |
Long-term debt | 0 | 2,299
SPD Bank [Member] | Revolving Credit Facility [Member] |  |
Long-term debt | 19,595 | 11,603
China Zheshang Bank Co., Ltd [Member] | Revolving Credit Facility [Member] | The ¥100M Credit Facility [Member] |  |
Long-term debt | 13,044 | 0
China Zheshang Bank Co., Ltd [Member] | Revolving Credit Facility [Member] | The ¥50M Credit Facility [Member] |  |
Long-term debt | $ 7,529 | $ 7,510

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