Note 12 - Income taxes - U.S. and Foreign Components of Income Loss (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Net Income (Loss) Attributable to Parent	$ (6,517,375)	$ (1,818,307)	$ (2,072,900)	$ (2,105,881)	$ (10,499,901)	$ (5,996,635)	$ (8,658,780)	$ (7,673,207)
Total	$ (6,506,291)	$ (1,818,307)			$ (10,488,817)	$ (5,996,635)	(8,602,725)	(7,673,207)
UNITED STATES
Net Income (Loss) Attributable to Parent							8,490,960	7,673,207
Foreign [Member]
Net Income (Loss) Attributable to Parent							$ 111,765

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details