Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Condensed Consolidated Statements of Income
Revenue, net	$ 11,153	$ 11,886
Cost of revenue	4,297	4,880
Gross profit	6,856	7,006
Operating expenses:
Engineering, research and development	829	623
Selling, general and administrative	3,888	3,536
Total operating expenses	4,717	4,159
Income from operations	2,139	2,847
Other income (expense):
Other income (expense), net	(5)	40
Income before income tax expense	2,134	2,887
Income tax expense (benefit)	874	(6)
Net income	1,260	2,893
Other comprehensive income, net of tax:
Foreign currency translation adjustments	112	(77)
Comprehensive income	$ 1,372	$ 2,816
Earnings per share, basic and diluted	$ 0.17	$ 0.39
Weighted average common shares outstanding - basic	7,333	7,327
Weighted average common shares outstanding - diluted	7,421	7,407