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Note 12 - Stockholders' Equity (Details Textual) |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended | 20 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 24, 2025 shares | Mar. 13, 2025 | Mar. 07, 2025 shares | Dec. 05, 2024 USD ($) $ / shares shares | Sep. 30, 2023 USD ($) $ / shares shares | Jun. 30, 2023 USD ($) $ / shares shares | Nov. 28, 2022 | Nov. 30, 2024 USD ($) $ / shares shares | Sep. 30, 2024 USD ($) $ / shares shares | Jun. 30, 2024 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares | Mar. 31, 2023 USD ($) $ / shares shares | Jan. 31, 2023 USD ($) shares | Dec. 31, 2024 USD ($) $ / shares shares | Sep. 30, 2024 $ / shares shares | Jun. 30, 2024 USD ($) $ / shares shares | Mar. 31, 2024 USD ($) $ / shares shares | Dec. 31, 2024 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares | Feb. 25, 2025 USD ($) $ / shares shares | Mar. 06, 2025 shares | Sep. 27, 2022
Preferred Stock, Shares Issued (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  |
Preferred Stock, Shares, Maximum Undesignated Issable (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  |  |  | 1,000,000 |  |  |  |
Common Stock, Shares Authorized (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 45,000,000 |  |  | 45,000,000 |  |  |  | 45,000,000 | 45,000,000 |  |  |
Common Stock, Shares, Outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 1,145,201 |  |  | 1,823,275 |  |  |  | 1,823,275 | 1,145,201 |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 | $ 200,000 |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,485,717 | 3,364,300 |  |  |
Payments to Acquire Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 700,000 | $ (0) |  |  |
QBSG Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment Owned, Percentage of Total Issued Share Capital |  |  |  | 15.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9.00%
Expo Experts [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 9,934 |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000 |  |  |  |  |  |  |  |  |
Yiran Gu [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 33,318 |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 21 |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  |  |  |  | $ 700,000 |  |  |  |  |  |  |  |  |  |
Tumim Stone Capital LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 381,717 |  |  |  |
Share Price, Percentage, Lowest Daily Weighed Average Price of Three Days Prior |  |  |  |  | 97.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tumim Stone Capital LLC [Member] | Stock Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  | 17,622 | 46,993 |  |  |  |  | 27,334 |  |  | 5,643 | 0 | 18,467 | 4,022 |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  | $ 750,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,846,017 |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  |  |  |  | $ 42.56 | $ 42.56 |  |  |  |  | $ 17 |  |  | $ 8.3 |  |  | $ 23.6 | $ 8.3 | $ 17 |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  | $ 2,000,000 |  |  |  |  | $ 464,300 |  |  | $ 46,728 |  | $ 239,885 | $ 95,104 |  |  |  |  |
Equity Offering, Maximum Offering Amount |  |  |  |  |  | $ 12,775,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tumim Stone Capital LLC [Member] | Stock Purchase Agreement [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 12.7 |  |  |  |  |  | $ 12.7 |  |  |  |  |  |
Tumim Stone Capital LLC [Member] | Stock Purchase Agreement [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 15.6 |  |  |  |  |  | 15.6 |  |  |  |  |  |
C F L [Member] | Stock Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 12,267 |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 16.3 |  |  |  |  |  |  |  | $ 16.3 |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  |  |  | $ 200,000 |  |  |  |  |  |  |  |  |  |  |
Eighty-eight Investment LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 495,000 |  |  |  |
Eighty-eight Investment LLC [Member] | Stock Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 4.95 |  |  |  |  |  | $ 4.95 |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  |  | $ 495,000 |  |  |  |  |  |  |  |  |  |  |  |
Yu Tian [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 120,000 |  |  |  |
Yu Tian [Member] | Stock Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  |  |  |  |  | 39,867 |  |  |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 3.01 |  |  |  |  |  | $ 3.01 |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  | $ 120,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Single Institutional Investor [Member] | Stock Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  |  |  |  | 140,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 8 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity |  |  |  |  |  |  |  | $ 1,989,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Single Institutional Investor [Member] | Stock Purchase Agreement [Member] | Pre-funded Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Issued During Period (in shares) | shares |  |  |  |  |  |  |  | 110,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 7.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |
QBSG Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |
QBSG Limited [Member] | Profit Participation Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  | 113,636 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  |  |  | $ 4.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aurous Vertex Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000 |  |  |  |
Aurous Vertex Limited [Member] | Stock Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 250,000 |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6 |  |  |  | $ 6 |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000 |  |  |  |
Option, Maximum Number of Shares (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  | 100,000 |  |  |  |
Option, Purchase Price Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6 |  |  |  | $ 6 |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Outstanding (in shares) | shares |  |  | 1,933,274 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,322,748 |
Subsequent Event [Member] | Aurous Vertex Limited [Member] | Stock Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option, Maximum Number of Shares (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000 |  |
Option, Purchase Price Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3.385 |  |
Reverse Stock Split [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reverse Stock Split [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio |  | 10 | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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