Note 3 - Summary of Significant Accounting Policies - Computation of Basic Net Income Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Weighted average common shares outstanding, basic (in shares)	997,182	989,994	996,636	988,510
Common shares upon exercise of options and warrants (in shares)	13,809	28,618	14,909	27,772
Weighted average common shares outstanding, diluted (in shares)	1,010,991	1,018,612	1,011,545	1,016,282