Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Condensed Consolidated Statements of Income
Revenue, net	$ 3,246	$ 2,646	$ 9,105	$ 7,744
Cost of revenue	1,296	1,135	3,641	3,638
Gross profit	1,950	1,511	5,464	4,106
Operating expenses:
Engineering, research and development	183	219	498	637
Selling, general and administrative	830	816	2,497	2,291
Total operating expenses	1,013	1,035	2,995	2,928
Income from operations	937	476	2,469	1,178
Other income (expense)
Other income (expense), net	6	(10)	35	32
Income before income tax expense (benefit)	943	466	2,504	1,210
Income tax expense (benefit)	329	8	535	(3)
Net income	614	458	1,969	1,213
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(4)	(8)	(25)	(9)
Comprehensive income	$ 610	$ 450	$ 1,944	$ 1,204
Earnings per share , basic and diluted	$ 0.08	$ 0.06	$ 0.27	$ 0.17
Weighted average common shares outstanding - basic	7,327	7,325	7,327	7,324
Weighted average common shares outstanding - diluted	7,410	7,331	7,406	7,330