Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Product cost of goods sold	$ 370,785	$ 349,637
Operating expenses:
Selling expenses	85,342	87,642
General and administrative expenses	102,946	92,688
Operating expenses	188,288	180,330
Operating income	9,066	9,210
Interest expense	(603)	(1,009)
Other income (expenses), net	1,211	(1,338)
Income before income taxes	(9,674)	(6,863)
Income tax expense	2,453	649
Net income	$ 7,221	$ 6,214
Earnings Per Share, Basic	$ 0.81	$ 0.70
Diluted income per share of common stock	$ 0.77	$ 0.67
Basic weighted average shares outstanding	8,968	8,909
Effect of dilutive securities outstanding	408	364
Diluted weighted average shares outstanding	9,376	9,273
Gross profit	$ 197,354	$ 189,540
Comprehensive income
Net income	7,221	6,214
Other comprehensive income, net of tax:
Adjustment for foreign currency translation	1,559	(2,382)
Comprehensive income	8,780	3,832
Product revenue
Product cost of goods sold	330,695	310,204
Service cost	155,304	145,493
Service revenue
Product cost of goods sold	40,090	39,433
Service cost	$ 18,127	$ 14,604