Consolidated Statement of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net revenues	$ 17,352	$ 10,823	$ 47,420	$ 29,955
Cost of revenues	8,556	5,246	22,475	14,982
Gross margin	8,796	5,577	24,945	14,973
Operating expenses:
Selling expense	2,322	1,394	5,861	4,200
Engineering and product development expense	1,139	905	3,056	2,878
General and administrative expense	3,143	1,574	8,423	5,364
Adjustment to contingent consideration liability	(549)	0	(549)
Total operating expenses	6,055	3,873	16,791	12,442
Operating income	2,741	1,704	8,154	2,531
Other income	100	17	195	63
Earnings before income tax expense	2,841	1,721	8,349	2,594
Income tax expense	823	631	2,808	937
Net earnings	$ 2,018	$ 1,090	$ 5,541	$ 1,657
Net earnings per common share - basic (in dollars per share)	$ 0.20	$ 0.11	$ 0.54	$ 0.16
Weighted average common shares outstanding - basic (in shares)	10,288,325	10,295,447	10,276,682	10,327,095
Net earnings per common share - diluted (in dollars per share)	$ 0.19	$ 0.11	$ 0.54	$ 0.16
Weighted average common shares and common share equivalents outstanding - diluted (in shares)	10,351,009	10,318,715	10,327,080	10,344,747