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Note 10 - CFL and Aurous Vertex Limited Transaction (Details Textual) - USD ($) |  | 2 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 24, 2025 | Feb. 28, 2025 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024 | Aug. 12, 2016
Proceeds from Issuance of Common Stock |  |  | $ 399,413 | $ 829,989 |  |
C F L [Member] |  |  |  |  |  |
Percentage of Common Stock Held By Investors |  |  | 12.40% |  |  |
Aurous Vertex Limited [Member] |  |  |  |  |  |
Percentage of Common Stock Held By Investors |  |  | 16.16% |  |  |
Common Stock, Shares, Held by Investors (in shares) |  |  | 350,000 |  |  |
Aurous Vertex Limited [Member] | Stock Purchase Agreement [Member] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 100,000 | 100,000 |  |  | 250,000 |
Shares Issued, Price Per Share (in dollars per share) |  | $ 3.385 |  |  | $ 6 |
Proceeds from Issuance of Common Stock |  | $ 338,500 |  |  | $ 1,500,000 |
Option, Maximum Number of Shares (in shares) |  | 100,000 |  |  | 100,000 |
Option, Purchase Price Per Share (in dollars per share) |  | $ 3.385 |  |  | $ 6 |
CFL Transactions [Member] |  |  |  |  |  |
Percentage of Common Stock Held By Investors |  |  |  |  |  | 51.00%

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