Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net revenues	$ 11,230	$ 18,062
Cost of revenues	6,363	9,226
Gross margin	4,867	8,836
Operating expenses:
Selling expense	2,052	2,374
Engineering and product development expense	1,292	1,284
General and administrative expense	2,884	3,737
Total operating expenses	6,228	7,395
Operating income (loss)	(1,361)	1,441
Other income (expense)	(32)	21
Earnings (loss) before income tax expense (benefit)	(1,393)	1,462
Income tax expense (benefit)	(250)	324
Net earnings (loss)	$ (1,143)	$ 1,138
Net earnings (loss) per common share - basic (in dollars per share)	$ (0.11)	$ 0.11
Weighted average common shares outstanding - basic (in shares)	10,220,853	10,385,017
Net earnings (loss) per common share - diluted (in dollars per share)	$ (0.11)	$ 0.11
Weighted average common shares and common share equivalents outstanding - diluted (in shares)	10,220,853	10,414,330