Note 3 - Summary of Significant Accounting Policies - Allowance for Credit Losses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Balance, beginning of period	$ 61,923	$ 66,526
Provision for doubtful accounts	142,618	13,986
Write-offs	(11,638)	(18,589)
Balance, end of period	$ 192,903	$ 61,923