Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net revenues	$ 14,632	$ 20,160	$ 47,046	$ 60,128
Cost of revenues	7,427	10,068	24,286	29,731
Gross margin	7,205	10,092	22,760	30,397
Operating expenses:
Selling expense	2,044	2,291	6,505	7,305
Engineering and product development expense	1,261	1,207	3,753	3,733
General and administrative expense	3,094	3,318	10,549	9,643
Adjustment to contingent consideration liability		3,057		4,073
Total operating expenses	6,399	9,873	20,807	24,754
Operating income	806	219	1,953	5,643
Other income (loss)	(12)	(57)	3	(103)
Earnings before income tax expense	794	162	1,956	5,540
Income tax expense	147	728	358	1,711
Net earnings (loss)	$ 647	$ (566)	$ 1,598	$ 3,829
Net earnings (loss) per common share - basic (in dollars per share)	$ 0.06	$ (0.05)	$ 0.15	$ 0.37
Weighted average common shares outstanding - basic (in shares)	10,421,383	10,355,673	10,405,892	10,341,552
Net earnings (loss) per common share - diluted (in dollars per share)	$ 0.06	$ (0.05)	$ 0.15	$ 0.37
Weighted average common shares and common share equivalents outstanding - diluted (in shares)	10,429,536	10,355,673	10,423,121	10,377,505