Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues	$ 11,016	$ 10,049	$ 32,738	$ 29,942
Cost of revenue	5,658	4,928	16,853	14,896
Gross profit	5,358	5,121	15,885	15,046
Operating Expenses:
General & administrative	1,599	1,471	4,907	4,278
Marketing & selling	1,267	1,065	3,807	3,552
Research & development	372	353	1,089	1,005
Total Operating Expenses	3,238	2,889	9,803	8,835
Operating income	2,120	2,232	6,082	6,211
Other income (expense)	(9)	13	47	(22)
Net income before provision for income taxes	2,111	2,245	6,129	6,189
Provision for income taxes	836	881	2,426	2,418
Net income	1,275	1,364	3,703	3,771
Other Comprehensive Income (Loss):
Foreign currency translation	(180)	108	(1,346)	37
Total Comprehensive Income	$ 1,095	$ 1,472	$ 2,357	$ 3,808
Basic net income per share (in dollars per share)	$ 0.23	$ 0.25	$ 0.67	$ 0.69
Diluted net income per share (in dollars per share)	0.23	0.25	0.67	0.68
Dividends declared per share (in dollars per share)	$ 0.18	$ 0.15	$ 0.54	$ 0.45