Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net revenue:
Products and license	$ 14,677	$ 11,464	$ 40,773	$ 32,821
Services	11,667	8,274	31,643	22,166
Total net revenue	26,344	19,738	72,416	54,987
Cost of revenue:
Products and license	2,064	1,357	6,192	4,433
Services	3,466	2,893	9,338	7,062
Total cost of revenue	5,530	4,250	15,530	11,495
Gross profit	20,814	15,488	56,886	43,492
Operating expenses:
Research and development	5,154	4,615	15,072	12,858
Sales and marketing	13,218	10,411	36,740	30,970
General and administrative	4,104	3,063	11,336	8,186
Total operating expenses	22,476	18,089	63,148	52,014
Loss from operations	(1,662)	(2,601)	(6,262)	(8,522)
Other income (expense), net	(67)	(63)	(126)	(238)
Loss before provision for income taxes	(1,729)	(2,664)	(6,388)	(8,760)
Provision for income taxes	262	205	642	471
Net loss	(1,991)	(2,869)	(7,030)	(9,231)
Loss attributable to noncontrolling interest	132	178	367	458
Net loss attributable to Imperva, Inc. stockholders	$ (1,859)	$ (2,691)	$ (6,663)	$ (8,773)
Net loss per share of common stock attributable to Imperva, Inc. stockholders, basic and diluted	$ (0.08)	$ (0.48)	$ (0.29)	$ (1.64)
Shares used in computing net loss per share of common stock, basic and diluted	23,159,742	5,553,912	22,683,810	5,334,581