Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenue	$ 305,896	$ 273,784	$ 255,098
Cost of revenue	170,868	125,505	120,503
Gross profit	135,028	148,279	134,595
Operating expenses:
Research and development	48,358	39,953	37,694
Sales and marketing	28,251	22,010	20,795
General and administrative	53,017	33,698	27,878
Amortization	10,445	1,534	1,940
Patent litigation income			(13,000)
Total operating expenses	140,071	97,195	75,307
Operating income (loss)	(5,043)	51,084	59,288
Interest income, net	3,666	2,206	971
Other income (expense), net	780	56	(457)
Income (loss) before provision (benefit) for income taxes	(597)	53,346	59,802
Provision (benefit) for income taxes	(2,507)	8,250	26,893
Net income	$ 1,910	$ 45,096	$ 32,909
Earnings per share:
Basic	$ 0.06	$ 1.77	$ 1.30
Diluted	$ 0.06	$ 1.74	$ 1.27
Weighted average number of shares outstanding:
Basic	29,729	25,470	25,325
Diluted	30,007	25,895	25,865