Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 118,070	$ 121,394	$ 224,488	$ 226,987
Cost of sales	31,600	27,439	59,918	53,353
Gross profit	86,470	93,955	164,570	173,634
Sales and marketing	59,888	57,338	114,025	108,123
General and administrative	15,846	18,335	35,174	34,779
Research and development	12,758	13,121	23,970	24,018
Acquisition-related amortization and remeasurement (Note 11)	(8,663)	894	(12,162)	5,363
Operating income	6,641	4,267	3,563	1,351
Interest expense, net	(407)	(550)	(782)	(967)
Other income (expense), net	(3,192)	951	(4,128)	(1,739)
Income (loss) before income taxes	3,042	4,668	(1,347)	(1,355)
Income tax expense	(553)	(2,248)	(624)	(2,041)
Net income (loss)	$ 2,489	$ 2,420	$ (1,971)	$ (3,396)
Net income (loss) per common share:
Basic	$ 0.12	$ 0.12	$ (0.10)	$ (0.17)
Diluted	$ 0.12	$ 0.12	$ (0.10)	$ (0.17)
Weighted average number of common shares:
Basic	20,031	19,651	19,965	19,575
Diluted	20,113	19,938	19,965	19,575
Other comprehensive loss, before tax
Unrealized gain (loss) on debt securities	$ 161	$ 98	$ (513)	$ (628)
Currency translation adjustment	(1,820)	(155)	(2,308)	(1,182)
Other comprehensive loss, before tax	(1,659)	(57)	(2,821)	(1,810)
Income tax benefit (expense) related to other comprehensive loss		(24)		156
Other comprehensive loss, net of tax	(1,659)	(81)	(2,821)	(1,654)
Comprehensive income (loss)	$ 830	$ 2,339	$ (4,792)	$ (5,050)