Note 9 - Leases - Operating Lease Balance Sheet Information (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
Total lease cost	$ 6,979	$ 9,702	$ 20,937	$ 38,808
Operating lease right-of-use assets	54,433		54,433		$ 73,372
Operating lease liabilities, current portion	26,522		26,522		24,642
Operating lease liabilities, non-current portion	28,967		28,967		$ 48,994
Total operating lease liabilities	$ 54,433		$ 54,433
Weighted average remaining lease term (in years) – operating leases (Year)	1 year 11 months 1 day		1 year 11 months 1 day		2 years 8 months 1 day
Weighted average discount rate – operating leases	5.50%		5.50%		5.50%
Cash paid for amounts included in the measurement of operating lease liabilities for the nine months ended September 30, 2025 and 2024:			$ 35,397		$ 40,622
2025 (3 months remaining)	$ 7,258		7,258
2026	29,267		29,267
2027	22,477		22,477
Total future lease payments	59,002		59,002
Less: imputed interest	(4,569)		(4,569)
Total	54,433		54,433
Approximation [Member]
Operating lease right-of-use assets	54,433		54,433		73,372
Total operating lease liabilities	55,489		55,489		73,636
Total	$ 55,489		$ 55,489		$ 73,636

Amount of lease cost recognized by lessee for lease contract.

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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year.

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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Amount of lessee's right to use underlying asset under operating lease.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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