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Note 11 - Notes Payable and Long-term Debt - Schedule of Notes Payable and Long-term Debt (Details) (Parentheticals) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 29, 2021 | Mar. 31, 2022 | Dec. 31, 2021 | Apr. 05, 2021
Chailease Finance Co, Ltd. [Member] | Promissory Note [Member] |  |  |  |
Long-term debt, maturity date |  | Jan. 21, 2022 | Jan. 21, 2022 |
Long-term debt, interest |  | 3.10% | 3.10% |
Revolving Credit Facility [Member] | Truist Bank [Member] |  |  |  |
Long-term debt, maximum (USD) |  |  |  | $ 20,000
Revolving Credit Facility [Member] | Truist Bank [Member] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |
Long-term debt, interest | 1.56% |  |  |
Revolving Credit Facility [Member] | Truist Bank [Member] | Secured Overnight Financing Rate (SOFR) [Member] | Sixth Amendment to Loan Agreement with Truist Bank [Member] |  |  |  |
Long-term debt, maximum (USD) |  | $ 20,000 | $ 20,000 |
Long-term debt, interest |  | 1.56% | 1.56% |
Long-term debt, maturity date |  | Apr. 15, 2023 | Apr. 15, 2023 |
Revolving Credit Facility [Member] | SPD Bank [Member] |  |  |  |
Long-term debt, maximum (USD) |  | $ 25,449 | $ 25,449 |
Long-term debt, maturity date |  | May 24, 2024 | May 24, 2024 |
Revolving Credit Facility [Member] | SPD Bank [Member] | Minimum [Member] |  |  |  |
Long-term debt, interest |  | 2.80% | 2.80% |
Revolving Credit Facility [Member] | SPD Bank [Member] | Maximum [Member] |  |  |  |
Long-term debt, interest |  | 4.57% | 4.57% |
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | The ¥100M Credit Facility [Member] |  |  |  |
Long-term debt, maximum (USD) |  | $ 14,125 | $ 14,125 |
Long-term debt, maturity date |  | Jan. 05, 2024 | Jan. 05, 2024 |
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | The ¥100M Credit Facility [Member] | Minimum [Member] |  |  |  |
Long-term debt, interest |  | 2.60% | 2.60% |
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | The ¥100M Credit Facility [Member] | Maximum [Member] |  |  |  |
Long-term debt, interest |  | 4.50% | 4.50% |
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | The ¥50M Credit Facility [Member] |  |  |  |
Long-term debt, maximum (USD) |  | $ 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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