CONDENSED CONSOLIDATED INCOME STATEMENTS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues	$ 24,677	$ 16,274	$ 43,361	$ 35,187
Cost of revenues	16,341	12,416	30,090	25,510
Gross profit	8,336	3,858	13,271	9,677
Marketing and sales	1,861	1,476	3,628	3,203
General and administrative	2,289	1,958	4,185	4,283
Research and development	1,040	348	2,043	658
Operating income	3,146	76	3,415	1,533
Other income (expense), net	104	9	(162)	(83)
Income before income taxes	3,250	85	3,253	1,450
Income tax expense	745	36	746	470
Net income	$ 2,505	$ 49	$ 2,507	$ 980
Earnings per share:
Basic	$ 0.32	$ 0.01	$ 0.32	$ 0.12
Diluted	$ 0.31	$ 0.01	$ 0.31	$ 0.12
Weighted-average shares of common stock outstanding:
Basic	7,949	7,929	7,941	7,929
Diluted	8,020	8,058	8,026	8,058