Note 6 - Net Income (Loss) Per Share - Earnings Per Share Reconciliation (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator for basic and diluted income (loss) per share, net income (loss) available to common shareholders	$ 75,492	$ 205,041	$ (174,696)	$ 219,874
Denominator:
Basic (in shares)	26,534,407	26,413,329	26,454,848	26,410,340
Effect of dilutive securities (in shares)	0	0	0	0
Diluted (in shares)	26,534,407	26,413,329	26,454,848	26,410,340
Basic income (loss) per common share: (in dollars per share)	$ 0	$ 0.01	$ (0.01)	$ 0.01
Diluted income (loss) per common share: (in dollars per share)	$ 0	$ 0.01	$ (0.01)	$ 0.01