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Note 11 - Notes Payable and Long-term Debt (Details Textual) $ in Thousands | Nov. 16, 2022 USD ($) | Jun. 07, 2022 USD ($) | May 24, 2019 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Jun. 07, 2022 CNY (¥) | Mar. 31, 2022 USD ($) | May 24, 2019 CNY (¥)
--- | --- | --- | --- | --- | --- | --- | --- | ---
Debt Instrument, Unused Borrowing Capacity, Amount |  |  |  | $ 19,400 | $ 13,300 |  |  |
Cash Collateral for Borrowed Securities |  |  |  | 9,400 | $ 9,900 |  |  |
Revolving Credit Facility [Member] | CIT Northbridge Credit, LLC [Member] | Loan Security and Guarantee Agreement [Member] |  |  |  |  |  |  |  |
Debt Instrument, Term (Year) | 3 years |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 27,780 |  |  | 27,780 |  |  | $ 27,780 |
Long-Term Line of Credit |  |  |  | 20,500 |  |  |  |
Revolving Credit Facility [Member] | CIT Northbridge Credit, LLC [Member] | Loan Security and Guarantee Agreement [Member] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate, Monthly Usage Less Than 50 Percentage | 3.75% |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 4.75% |  |  |  |  |  |  |
Revolving Credit Facility [Member] | SPD Bank [Member] |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | 19,037 |  |  | $ 19,037 |
Revolving Credit Facility [Member] | SPD Bank [Member] | The SPD Credit Line [Member] | Global Technology, Inc. [Member] |  |  |  |  |  |  |  |
Debt Instrument, Term (Year) |  |  | 5 years |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 25,400 |  |  |  |  | ¥ 180,000,000
Revolving Credit Facility [Member] | SPD Bank [Member] | The SPD 2.0M Credit Facility [Member] | Global Technology, Inc. [Member] |  |  |  |  |  |  |  |
Long-Term Line of Credit |  |  |  | 12,900 |  |  |  |
Bank Acceptances Executed |  |  |  | 14,000 |  |  |  |
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | The ¥50M Credit Facility [Member] |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | 728 |  |  |  |
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | The ¥50M Credit Facility [Member] | Global Technology, Inc. [Member] |  |  |  |  |  |  |  |
Debt Instrument, Term (Year) |  | 5 years |  |  |  |  |  |
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | The ¥200M Credit Facility [Member] | Global Technology, Inc. [Member] |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 29,900 |  |  |  | ¥ 200,000,000 |  |
Long-Term Line of Credit |  |  |  | 17,800 |  |  |  |
Bank Acceptances Executed |  |  |  | $ 5,200 |  |  |  |

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