Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statements of Operations:
Revenue	$ 488,098	$ 434,395	$ 458,728
Cost of revenue	265,407	216,568	223,438
Gross profit	222,691	217,827	235,290
Operating expenses
Marketing and sales	82,175	69,309	72,976
Research and development	44,241	36,940	32,692
General and administrative	55,933	51,742	49,766
Total operating expenses	182,349	157,991	155,434
Income from operations	40,342	59,836	79,856
Other (expense) income, net	(158)	3,109	1,337
Income before income taxes	40,184	62,945	81,193
Provision for income taxes	6,812	12,078	17,538
Net income	$ 33,372	$ 50,867	$ 63,655
Net income per share:
Basic (in dollars per share)	$ 1.21	$ 1.90	$ 2.37
Diluted (in dollars per share)	$ 1.21	$ 1.89	$ 2.35
Shares used to compute net income per share:
Basic (in shares)	27,617,627	26,737,425	26,866,985
Diluted (in shares)	27,653,099	26,896,357	27,049,423
Other Comprehensive Income (Loss), net of tax
Foreign currency translation adjustments	$ (13,278)	$ 3,598	$ 1,474
Net unrealized gains (losses) on investments in securities	(119)	0	0
Comprehensive income	$ 19,975	$ 54,465	$ 65,129