Note 11 - Net loss per share attributable to common stockholders - Basic and Diluted Net Loss Per Share (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Net loss to common shareholders	$ (11,048,511)	$ (1,927,132)	$ (15,380,249)	$ (6,320,406)	$ (9,121,376)	$ (7,821,162)
Weighted average shares of common stock outstanding, basic and diluted					92,638,720	68,039,666
Net loss per share, basic and diluted	$ (0.06)	$ (0.02)	$ (0.12)	$ (0.07)	$ (0.10)	$ (0.11)

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

+ References

+ Details