Note 17 - Quarterly Data (Unaudited) - Summary of Quarterly Data (Unaudited) (Details) - USD ($)	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	$ 33,827,050	$ 33,641,513	$ 36,933,015	$ 39,484,356	$ 32,660,531	$ 32,189,623	$ 31,902,027	$ 31,002,746	$ 143,885,934	$ 127,754,927
Gross Profit	7,745,321	8,909,332	10,474,878	10,516,552	7,588,082	6,309,803	6,768,491	6,366,405	37,646,082	27,032,781
Operating Income	3,363,871	4,296,968	5,152,364	5,119,267	2,760,946	1,999,678	2,375,527	1,397,321	17,932,471	8,533,472
Net Income	$ 3,237,242	$ 2,814,736	$ 3,851,342	$ 3,391,473	$ 3,069,719	$ 1,254,545	$ 1,171,264	$ 1,065,875	$ 13,294,793	$ 6,561,403
Net Income Per Common Share - Basic (in dollars per share)	$ 0.92	$ 0.8	$ 1.1	$ 0.97	$ 0.88	$ 0.36	$ 0.34	$ 0.31	$ 3.79	$ 1.89
Net Income Per Common Share - Diluted (in dollars per share)	$ 0.91	$ 0.8	$ 1.09	$ 0.97	$ 0.88	$ 0.36	$ 0.34	$ 0.31	$ 3.77	$ 1.89