Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net revenues	$ 53,823	$ 60,660
Cost of revenues	29,719	31,435
Gross margin	24,104	29,225
Operating expenses:
Selling expense	7,522	8,460
Engineering and product development expense	5,070	4,964
General and administrative expense	11,444	13,012
Restructuring and other charges	1,285	240
Total operating expenses	25,321	26,676
Operating income (loss)	(1,217)	2,549
Other income (loss)	(14)	55
Earnings (loss) before income tax expense (benefit)	(1,231)	2,604
Income tax expense (benefit)	(336)	282
Net earnings (loss)	$ (895)	$ 2,322
Net earnings (loss) per common share – basic (in dollars per share)	$ (0.09)	$ 0.22
Weighted average common shares outstanding – basic (in shares)	10,256,560	10,373,164
Net earnings (loss) per common share – diluted (in dollars per share)	$ (0.09)	$ 0.22
Weighted average common shares and common share equivalents outstanding – diluted (in shares)	10,256,560	10,391,975