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Note 4 - Debt - Summary of Credit and Other Debt Facilities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Interest Rate |  |
Balance | $ 17,980 | $ 11,042
Balance outstanding | $ 1,376 | $ 700
USA - North Mill Capital [Member] |  |
Interest Rate | 5.25% | 5.38%
Balance | $ 14,399 | $ 9,680
Investec Bank Ltd. [Member] |  |
Interest Rate | 10.50% |
Balance | $ 1,700 | $ 0
Balance outstanding | $ 1,376 | $ 0
USA - Resource Plus Sellers, Short-term [Member] |  |
Interest Rate | 1.85% | 1.87%
Balance | $ 1,000 | $ 300
USA - Resource Plus Sellers [Member] |  |
Interest Rate | 0.00% | 1.87%
Balance outstanding | $ 0 | $ 700
National Australia Bank [Member] |  |
Interest Rate | 10.60% | 6.76%
Balance | $ 156 | $ 118
People's Bank of China [Member] |  |
Interest Rate | 0.00% | 3.71%
Balance | $ 0 | $ 157
Industrial Bank [Member] |  |
Interest Rate | 4.00% | 6.17%
Balance | $ 435 | $ 472
Industrial Bank and Commercial Bank of China [Member] |  |
Interest Rate | 4.15% | 4.23%
Balance | $ 290 | $ 315

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