Note 3 - Summary of significant accounting policies - Revenue Recognized From Each Offering (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
Accounting Policies [Abstract]
MCAs Income and Fees					$ 10,225,976	$ 11,286,626
Brokerage Commissions					2,483,084	294,472
Management fee					44,874
Others					33,328	219,130
Revenue	$ 5,333,729	$ 3,113,693	$ 12,014,133	$ 9,566,571	$ 12,787,262	$ 11,800,228

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details