Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 351,591	$ 370,785
Cost of goods sold	165,053	173,431
Gross profit	186,538	197,354
Operating expenses:
Selling expenses	76,775	85,342
General and administrative expenses	89,213	102,946
Operating expenses	165,988	188,288
Operating income	20,550	9,066
Interest expense	(654)	(603)
Other income, net	889	1,211
Income before income taxes	(20,785)	(9,674)
Income tax expense	5,672	2,453
Net income	$ 15,113	$ 7,221
Basic income per share of common stock (in USD per share)	$ 1.68	$ 0.81
Diluted income per share of common stock (in USD per share)	$ 1.62	$ 0.77
Weighted average shares outstanding:
Basic weighted average shares outstanding (in shares)	9,020	8,968
Effect of dilutive securities outstanding (in shares)	311	408
Diluted weighted average shares outstanding (in shares)	9,331	9,376
Comprehensive income
Net income	$ 15,113	$ 7,221
Other comprehensive income, net of tax:
Adjustment for foreign currency translation	700	1,559
Comprehensive income	$ 15,813	$ 8,780