Consolidated Statement of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017
Net revenues	$ 15,888	$ 10,485	$ 30,068
Cost of revenues	7,467	5,156	13,919
Gross margin	8,421	5,329	16,149
Selling expense	1,871	1,471	3,539
Engineering and product development expense	982	982	1,917
General and administrative expense	3,286	2,145	5,280
Total operating expenses	6,139	4,598	10,736
Operating income	2,282	731	5,413
Other income	54	18	95
Earnings before income tax expense	2,336	749	5,508
Income tax expense	891	263	1,985
Net earnings	$ 1,445	$ 486	$ 3,523
Net earnings per common share - basic (in dollars per share)	$ 0.14	$ 0.05	$ 0.34
Weighted average common shares outstanding - basic (in shares)	10,277,155	10,295,836	10,270,860
Net earnings per common share - diluted (in dollars per share)	$ 0.14	$ 0.05	$ 0.34
Weighted average common shares and common share equivalents outstanding - diluted (in shares)	10,334,894	10,310,692	10,315,115