Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Revenue	$ 69,453	$ 95,374	$ 235,235	$ 336,892
Cost of revenue:
Cost of revenue	38,872	55,461	135,399	200,823
Gross profit	30,581	39,913	99,836	136,069
Operating expenses:
Research and development	12,930	12,845	40,335	37,631
Sales and marketing	8,057	7,923	25,411	25,246
General and administrative	7,707	8,477	23,097	24,755
Total operating expenses	28,694	29,245	88,843	87,632
Income from operations	1,887	10,668	10,993	48,437
Other (expense) income:
Interest income	687	593	2,373	1,518
Interest expense	(1,308)	(1,323)	(3,849)	(3,787)
Other, net	(890)	(592)	(1,252)	(1,710)
Total other expense	(1,511)	(1,322)	(2,728)	(3,979)
Income before income taxes	376	9,346	8,265	44,458
Income tax (benefit) provision	(328)	508	943	7,036
Net income	$ 704	$ 8,838	$ 7,322	$ 37,422
Net income per share:
Basic (in dollars per share)	$ 0.02	$ 0.27	$ 0.22	$ 1.16
Diluted (in dollars per share)	$ 0.02	$ 0.26	$ 0.22	$ 1.10
Shares used in computing net income per share:
Basic weighted average common shares	32,344	32,365	32,584	32,225
Diluted weighted average common shares	33,323	33,973	33,821	34,032
Product
Revenue:
Revenue	$ 64,290	$ 88,496	$ 217,201	$ 317,039
Cost of revenue:
Cost of revenue	33,587	49,136	118,105	181,423
Services
Revenue:
Revenue	5,163	6,878	18,034	19,853
Cost of revenue:
Cost of revenue	$ 5,285	$ 6,325	$ 17,294	$ 19,400