Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues	$ 39,701	$ 38,980	$ 26,975
Cost of revenues	19,879	17,530	14,258
Gross profit	19,822	21,450	12,717
Operating Expenses:
General & administrative	5,642	4,965	4,561
Marketing & selling	4,666	4,960	5,053
Research & development	1,357	1,415	1,632
Total Operating Expenses	11,665	11,340	11,246
Operating income	8,157	10,110	1,471
Other income (expense)	20	(134)	(124)
Net income before provision for income taxes	8,177	9,976	1,347
Provision for / (benefit from) income taxes	2,056	3,298	(164)
Net income	6,121	6,678	1,511
Other Comprehensive Income (Loss):
Foreign currency translation	(238)
Total Comprehensive Income (Loss)	$ 5,883	$ 6,678	$ 1,511
Basic net income per share (in dollars per share)	$ 1.12	$ 1.23	$ 0.28
Diluted net income per share (in dollars per share)	1.10	1.22	0.28
Dividends declared per share (in dollars per share)	$ 0.60	$ 0.60	$ 0.60