Note 4 - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Numerator for basic and diluted earnings per share - net income	$ 2,594	$ 4,118
Denominator for basic earnings per share - weighted average shares outstanding	3,655,176	3,588,363
Denominator for diluted earnings per share - adjusted weighted average shares outstanding	3,655,176	3,588,363
Earnings per share - basic	$ 0.71	$ 1.15
Earnings per share - diluted	$ 0.71	$ 1.15