Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue	$ 29,571	$ 21,820	$ 53,652	$ 41,376
Cost of revenue	16,023	10,858	29,091	20,893
Gross profit	13,548	10,962	24,561	20,483
Operating expenses:
Selling expense	4,033	2,605	7,489	5,008
Engineering and product development expense	1,859	1,356	3,783	2,678
General and administrative expense	4,928	3,769	9,759	6,930
Restructuring and other charges	0	197	0	252
Total operating expenses	10,820	7,927	21,031	14,868
Operating income	2,728	3,035	3,530	5,615
Other income (expense)	(158)	21	(305)	19
Earnings before income tax expense	2,570	3,056	3,225	5,634
Income tax expense	454	447	532	813
Net earnings	$ 2,116	$ 2,609	$ 2,693	$ 4,821
Earnings per common share - basic (in dollars per share)	$ 0.20	$ 0.25	$ 0.25	$ 0.46
Weighted average common shares outstanding - basic (in shares)	10,653,268	10,442,916	10,635,270	10,386,183
Earnings per common share - diluted (in dollars per share)	$ 0.20	$ 0.24	$ 0.25	$ 0.45
Weighted average common shares and common share equivalents outstanding - diluted (in shares)	10,814,799	10,764,936	10,828,696	10,645,381