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, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Revenue	$ 36,603	$ 30,272	$ 33,991	$ 29,824	$ 27,884	$ 30,941	$ 32,558	$ 31,919	$ 130,690	$ 123,302
Gross margin	14,539	14,012	13,797	13,076	12,449	14,447	15,030	15,052	55,424	56,978
Earnings before income tax expense	1,802	569	296	787	1,566	2,723	3,365	3,394	3,454	11,048
Income tax expense	298	74	66	125	111	446	572	577	563	1,706
Net earnings	$ 1,504	$ 495	$ 230	$ 662	$ 1,455	$ 2,277	$ 2,793	$ 2,817	$ 2,891	$ 9,342
Net earnings per common share – basic (in dollars per share)	$ 0.12	$ 0.04	$ 0.02	$ 0.06	$ 0.12	$ 0.19	$ 0.25	$ 0.26	$ 0.24	$ 0.82
Weighted average common shares outstanding – basic (in shares)	12,156,931	12,189,761	12,234,599	12,026,361	11,962,679	11,886,005	11,241,183	10,755,729	12,151,913	11,461,399
Net earnings per common share – diluted (in dollars per share)	$ 0.12	$ 0.04	$ 0.02	$ 0.05	$ 0.12	$ 0.19	$ 0.24	$ 0.25	$ 0.24	$ 0.79
Weighted average common shares outstanding – diluted (in shares)	12,216,344	12,251,712	12,330,280	12,158,297	12,122,099	12,212,317	11,696,569	11,088,664	12,239,158	11,779,912