Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net revenue:
Products and license	$ 86,798	$ 107,563	$ 74,299
Services	177,657	126,735	89,711
Total net revenue	264,455	234,298	164,010
Cost of revenue:
Products and license	9,525	10,947	9,248
Services	44,307	36,633	27,335
Total cost of revenue	53,832	47,580	36,583
Gross profit	210,623	186,718	127,427
Operating expenses:
Research and development	62,402	53,376	43,052
Sales and marketing	156,465	136,292	106,382
General and administrative	51,260	43,440	34,499
Restructuring charges	8,118
Amortization of acquired intangible assets	1,408	1,408	1,269
Total operating expenses	279,653	234,516	185,202
Loss from operations	(69,030)	(47,798)	(57,775)
Other income (expense), net	(77)	(402)	(220)
Loss before provision for income taxes	(69,107)	(48,200)	(57,995)
Provision for income taxes	1,172	682	1,181
Net loss	(70,279)	(48,882)	(59,176)
Loss attributable to non - controlling interest	0		213
Net loss attributable to Imperva, Inc. stockholders	$ (70,279)	$ (48,882)	$ (58,963)
Net loss per share of common stock attributable to Imperva, Inc. stockholders, basic and diluted	$ (2.18)	$ (1.64)	$ (2.28)
Shares used in computing net loss per share of common stock, basic and diluted	32,284	29,849	25,806