Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue	$ 30,941			$ 30,771			$ 95,418	$ 84,423
Cost of revenue	16,494			16,873			50,889	45,964
Gross profit	14,447			13,898			44,529	38,459
Operating expenses:
Selling expense	4,295			4,009			13,411	11,498
Engineering and product development expense	1,802			1,866			5,689	5,649
General and administrative expense	5,882			4,864			16,099	14,623
Total operating expenses	11,979			10,739			35,199	31,770
Operating income	2,468			3,159			9,330	6,689
Interest expense	(168)			(179)			(526)	(457)
Other income	423			59			678	32
Earnings before income tax expense	2,723			3,039			9,482	6,264
Income tax expense	446			515			1,595	1,047
Net earnings	$ 2,277	$ 2,793	$ 2,817	$ 2,524	$ 2,116	$ 577	$ 7,887	$ 5,217
Earnings per common share - basic (in dollars per share)	$ 0.19			$ 0.24			$ 0.7	$ 0.49
Weighted average common shares outstanding - basic (in shares)	11,886,005			10,695,867			11,294,306	10,655,469
Earnings per common share - diluted (in dollars per share)	$ 0.19			$ 0.23			$ 0.68	$ 0.48
Weighted average common shares and common share equivalents outstanding - diluted (in shares)	12,212,317			10,864,540			11,665,850	10,840,644