Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue	$ 103,556	$ 91,035
Cost of goods sold	48,996	42,114
Gross profit	54,560	48,921
Operating expenses:
Selling expenses	23,802	19,984
General and administrative expenses	25,948	10,299
Operating expenses	49,750	30,283
Operating income	4,810	18,638
Interest expense	(323)	(115)
Other income (expense), net	(372)	1,111
Income before income taxes	4,859	17,412
Income tax expense	1,263	4,879
Net income	$ 3,596	$ 12,533
Basic income per share of common stock (in USD per share)	$ 0.40	$ 1.39
Diluted income per share of common stock (in USD per share)	$ 0.39	$ 1.34
Weighted average shares outstanding:
Basic weighted average shares outstanding (in shares)	9,063	9,032
Effect of dilutive securities outstanding (in shares)	265	302
Diluted weighted average shares outstanding (in shares)	9,328	9,334
Comprehensive income:
Net income	$ 3,596	$ 12,533
Adjustment for foreign currency translation	631	(2,494)
Net comprehensive income	$ 4,227	$ 10,039