Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Consolidated Statements of Income and Comprehensive Income
Revenue, net	$ 2,573	$ 2,884
Cost of revenue	1,162	1,148
Gross profit	1,411	1,736
Operating expenses:
Engineering, research and development	224	178
Selling, general and administrative	968	1,027
Total operating expenses	1,192	1,205
Income from operations	219	531
Other income (expense):
Other income (expense), net	(46)	19
Income before income tax expense	173	550
Income tax expense	55	186
Net income	118	364
Other comprehensive income, net of tax:
Foreign currency translation adjustments	85	11
Comprehensive income	$ 203	$ 375
Earnings per share, basic and diluted	$ 0.02	$ 0.05
Weighted average common shares outstanding - basic	7,328	7,328
Weighted average common shares outstanding - diluted	7,416	7,412