Note 18 - Quarterly Consolidated Financial Data (Unaudited) - Quarterly Consolidated Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Revenue	$ 27,884	$ 30,941	$ 32,558	$ 31,919	$ 32,405	$ 30,771	$ 29,571	$ 24,081	$ 123,302	$ 116,828
Gross profit	12,449	14,447	15,030	15,052	14,981	13,898	13,548	11,013	56,978	53,440
Earnings before income tax expense	1,566	2,723	3,365	3,394	3,881	3,039	2,570	655	11,048	10,145
Income tax expense	111	446	572	577	637	515	454	78	1,706	1,684
Net earnings	$ 1,455	$ 2,277	$ 2,793	$ 2,817	$ 3,244	$ 2,524	$ 2,116	$ 577	$ 9,342	$ 8,461
Net earnings per common share – basic (in dollars per share)	$ 0.12	$ 0.19	$ 0.25	$ 0.26	$ 0.3	$ 0.24	$ 0.2	$ 0.05	$ 0.82	$ 0.79
Weighted average common shares outstanding – basic (in shares)	11,962,679	11,886,005	11,241,183	10,755,729	10,725,662	10,695,867	10,653,268	10,617,271	11,461,399	10,673,017
Net earnings per common share – diluted (in dollars per share)	$ 0.12	$ 0.19	$ 0.24	$ 0.25	$ 0.3	$ 0.23	$ 0.2	$ 0.05	$ 0.79	$ 0.78
Weighted average common shares outstanding – diluted (in shares)	12,122,099	12,212,317	11,696,569	11,088,664	10,928,220	10,864,540	10,814,799	10,842,592	11,779,912	10,862,538