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Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue:
Products	$ 38,797	$ 33,331	$ 75,171	$ 63,847
Services	18,333	14,205	35,763	27,706
Total revenue	57,130	47,536	110,934	91,553
Cost of revenue:
Products	9,804	7,909	18,502	14,972
Services	4,405	3,692	8,934	7,415
Total cost of revenue	14,209	11,601	27,436	22,387
Gross profit	42,921	35,935	83,498	69,166
Operating expenses:
Sales and marketing	26,773	24,962	53,541	49,484
Research and development	14,486	13,671	29,263	27,980
General and administrative	7,230	5,703	13,891	13,230
Litigation and settlement expense	202	1,025	1,993	1,470
Total operating expenses	48,691	45,361	98,688	92,164
Loss from operations	(5,770)	(9,426)	(15,190)	(22,998)
Other income (expense), net:
Interest expense	(126)	(104)	(252)	(231)
Interest income and other income (expense), net	1,020	(216)	1,235	(189)
Total other income (expense), net	894	(320)	983	(420)
Loss before provision for income taxes	(4,876)	(9,746)	(14,207)	(23,418)
Provision for income taxes	59	231	263	293
Net loss	$ (4,935)	$ (9,977)	$ (14,470)	$ (23,711)
Net loss per share:
Basic and diluted (in dollars per share)	$ (0.08)	$ (0.16)	$ (0.22)	$ (0.38)
Weighted-average shares used in computing net loss per share:
Weighted-average shares used in computing net loss per share - Basic and Diluted (in shares)	64,861	61,945	64,584	61,690

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