CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues	$ 10,049	$ 11,849	$ 29,942	$ 28,216
Cost of revenues	4,928	4,744	14,896	13,164
Gross profit	5,121	7,105	15,046	15,052
Operating Expenses:
General & administrative	1,471	1,278	4,278	3,716
Marketing & selling	1,065	1,375	3,552	3,804
Research & development	353	348	1,005	1,059
Total Operating Expenses	2,889	3,001	8,835	8,579
Operating income	2,232	4,104	6,211	6,473
Interest income (expense), net	13	(34)	(22)	(104)
Net income before provision for income taxes	2,245	4,070	6,189	6,369
Provision for income taxes	881	1,362	2,418	2,051
Net income	$ 1,364	$ 2,708	$ 3,771	$ 4,318
Earnings per common share (basic) (in dollars per share)	$ 0.25	$ 0.5	$ 0.69	$ 0.79
Earnings per common share (diluted) (in dollars per share)	0.25	0.49	0.68	0.79
Dividends declared per share (in dollars per share)	$ 0.15	$ 0.15	$ 0.45	$ 0.45
Other comprehensive income:
Foreign currency translation (gross)	$ 108	$ 0	$ 37	$ 0
Total comprehensive income	$ 1,472	$ 2,708	$ 3,808	$ 4,318