Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Revenue	$ 74,305	$ 119,333	$ 165,782	$ 241,518
Cost of revenue:
Cost of revenue	42,556	70,333	96,527	145,362
Gross profit	31,749	49,000	69,255	96,156
Operating expenses:
Research and development	13,720	12,553	27,405	24,786
Sales and marketing	8,436	8,912	17,354	17,323
General and administrative	7,583	8,268	15,390	16,278
Total operating expenses	29,739	29,733	60,149	58,387
Income from operations	2,010	19,267	9,106	37,769
Other (expense) income:
Interest income	845	515	1,686	925
Interest expense	(1,311)	(1,127)	(2,541)	(2,464)
Other, net	(189)	(1,016)	(362)	(1,118)
Total other expense	(655)	(1,628)	(1,217)	(2,657)
Income before income taxes	1,355	17,639	7,889	35,112
Income tax provision	799	2,970	1,271	6,528
Net income	$ 556	$ 14,669	$ 6,618	$ 28,584
Net income per share:
Basic (in dollars per share)	$ 0.02	$ 0.46	$ 0.20	$ 0.89
Diluted (in dollars per share)	$ 0.02	$ 0.43	$ 0.19	$ 0.84
Shares used in computing net income per share:
Basic weighted average common shares	32,729	32,214	32,706	32,154
Diluted weighted average common shares	33,901	33,942	34,064	34,048
Product
Revenue:
Revenue	$ 68,714	$ 112,521	$ 152,911	$ 228,543
Cost of revenue:
Cost of revenue	37,188	63,913	84,518	132,287
Services
Revenue:
Revenue	5,591	6,812	12,871	12,975
Cost of revenue:
Cost of revenue	$ 5,368	$ 6,420	$ 12,009	$ 13,075