Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net revenue:
Products and license	$ 11,971	$ 14,154
Services	19,545	14,431
Total net revenue	31,516	28,585
Cost of revenue:
Products and license	1,732	1,876
Services	6,020	4,415
Total cost of revenue	7,752	6,291
Gross profit	23,764	22,294
Operating expenses:
Research and development	9,961	6,358
Sales and marketing	23,035	17,547
General and administrative	8,405	4,383
Amortization of acquired intangible assets	204
Total operating expenses	41,605	28,288
Loss from operations	(17,841)	(5,994)
Other income (expense), net	(154)	(47)
Loss before provision (benefit) for income taxes	(17,995)	(6,041)
Provision (Benefit) for income taxes	(371)	154
Net loss	(17,624)	(6,195)
Loss attributable to noncontrolling interest	213	136
Net loss attributable to Imperva, Inc. stockholders	$ (17,411)	$ (6,059)
Net loss per share of common stock attributable to Imperva, Inc. stockholders, basic and diluted	$ (0.69)	$ (0.25)
Shares used in computing net loss per share of common stock, basis and diluted	25,255,161	23,905,027