Note 2 - Summary of Significant Accounting Policies - Reconciliation of Net Income and Number of Shares Used in Computers of Basic and Diluted EPS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Net income	$ 3,929,000	$ 4,189,000
Basic weighted average common shares outstanding (in shares)	11,137,873	11,856,356
Add: Dilutive effect of common stock options (in shares)	97,173	0
Diluted weighted average common shares outstanding (in shares)	11,235,046	11,856,356
Basic earnings per common share (in dollars per share)	$ 0.35	$ 0.35
Diluted earnings per common share (in dollars per share)	$ 0.35	$ 0.35