Consolidated Statements of Income and Comprehensive Income (loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Total revenue	$ 91,035	$ 91,343
Gross profit	48,921	48,923
Operating expenses:
Selling expenses	19,984	21,742
General and administrative expenses	10,299	21,637
Operating expenses	30,283	43,379
Operating income	18,638	5,544
Interest expense	(115)	(197)
Other income (expense), net	1,111	(472)
Income before income taxes	17,412	5,819
Income tax expense	4,879	1,673
Net income	$ 12,533	$ 4,146
Basic income per share of common stock	$ 1.39	$ 0.46
Diluted income per share of common stock	$ 1.34	$ 0.44
Weighted average shares outstanding:
Basic weighted average shares outstanding	9,032	8,962
Effect of dilutive securities outstanding	302	355
Diluted weighted average shares outstanding	9,334	9,317
Comprehensive income:
Net income	$ 12,533	$ 4,146
Adjustment for foreign currency translation	(2,494)	675
Net comprehensive income	10,039	4,821
Product [Member]
Revenue	81,335	81,915
Cost of goods sold	37,805	38,007
Service [Member]
Revenue	9,700	9,428
Cost of goods sold	$ 4,309	$ 4,413