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Note 8 - Long-term Investments (Details Textual) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 05, 2024 | Sep. 27, 2022 | Dec. 31, 2024 | Dec. 31, 2023
Stock Issued During Period, Value, New Issues |  |  | $ 500,000 | $ 200,000
Payments to Acquire Investments |  |  | $ 700,000 | $ (0)
Stock Purchase Agreement [Member] | QBSG Limited [Member] |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  | 86,339 |  |
Stock Issued During Period, Value, New Issues |  | $ 1,350,000 |  |
Profit Participation Agreement [Member] | QBSG Limited [Member] |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 113,636 |  |  |
Stock Issued During Period, Value, New Issues | $ 500,000 |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ 4.4 |  |  |
QBSG Limited [Member] |  |  |  |
Investment Owned, Balance, Shares (in shares) |  | 65,700 |  |
Investment Owned, Percentage of Total Issued Share Capital | 15.00% | 9.00% |  |
Investment Ownership, Additional Percentage Acquired in Transaction | 6.00% |  |  |
Investment Ownership, Additional Percentage Acquired, Consideration Transferred | $ 1,200,000 |  |  |
Payments to Acquire Investments | $ 700,000 |  |  |
QBSG Limited [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Investment Owned, Percentage of Total Issued Share Capital |  |  | 6.00% |
Investment Owned, Cost |  |  | $ 1,200,000 |

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