Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net revenue:
Products and license	$ 107,563	$ 74,299	$ 72,153
Services	126,735	89,711	65,606
Total net revenue	234,298	164,010	137,759
Cost of revenue:
Products and license	10,947	9,248	8,756
Services	36,633	27,335	20,940
Total cost of revenue	47,580	36,583	29,696
Gross profit	186,718	127,427	108,063
Operating expenses:
Research and development	53,376	43,052	27,556
Sales and marketing	136,292	106,382	81,500
General and administrative	43,440	34,499	24,436
Amortization of acquired intangible assets	1,408	1,269	0
Total operating expenses	234,516	185,202	133,492
Loss from operations	(47,798)	(57,775)	(25,429)
Other income (expense), net	(402)	(220)	(125)
Loss before provision for income taxes	(48,200)	(57,995)	(25,554)
Provision for income taxes	682	1,181	777
Net loss	(48,882)	(59,176)	(26,331)
Loss attributable to non - controlling interest	0	213	1,153
Net loss attributable to Imperva, Inc. stockholders	$ (48,882)	$ (58,963)	$ (25,178)
Net loss per share of common stock attributable to Imperva, Inc. stockholders, basic and diluted	$ (1.64)	$ (2.28)	$ (1.04)
Shares used in computing net loss per share of common stock, basic and diluted	29,849	25,806	24,300