Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 65,801	$ 76,704	[1]
Short-term investments	35,395	38,381	[1]
Restricted cash	34	34	[1]
Accounts receivable, net of allowance for doubtful accounts of $410 as of September 30, 2014 and December 31, 2013	35,537	44,446	[1]
Inventory	359	512	[1]
Deferred tax assets	347	341	[1]
Prepaid expenses and other current assets	3,530	3,972	[1]
Total current assets	141,003	164,390	[1]
Property and equipment, net	6,656	5,475	[1]
Goodwill	34,972	0	[1]
Acquired intangible assets, net	9,751	0	[1]
Severance pay fund	4,044	4,140	[1]
Restricted cash	1,575	1,252	[1]
Deferred tax assets	42	42	[1]
Other assets	953	1,192	[1]
TOTAL ASSETS	198,996	176,491	[1]
CURRENT LIABILITIES:
Accounts payable	3,461	3,948	[1]
Accrued compensation and benefits	13,617	12,930	[1]
Accrued and other current liabilities	5,514	3,961	[1]
Deferred revenue	46,154	40,337	[1]
Total current liabilities	68,746	61,176	[1]
Other liabilities	9,450	1,993	[1]
Deferred revenue	22,793	22,715	[1]
Accrued severance pay	4,331	4,385	[1]
TOTAL LIABILITIES	105,320	90,269	[1]
Commitments and Contingencies (Note 9)			[1]
STOCKHOLDERS' EQUITY:
Preferred stock, $0.0001 par value - 5,000,000 shares authorized, no shares issued and outstanding as of September 30, 2014 and December 31, 2013	0	0	[1]
Common stock, $0.0001 par value - 145,000,000 shares authorized, 26,582,777 and 25,206,498 shares issued and outstanding as of September 30, 2014 and December 31, 2013, respectively	2	2	[1]
Additional paid-in capital	239,699	187,957	[1]
Accumulated deficit	(145,162)	(98,695)	[1]
Accumulated other comprehensive loss	(863)	(428)	[1]
TOTAL IMPERVA, INC. STOCKHOLDERS' EQUITY	93,676	88,836	[1]
Noncontrolling interest	0	(2,614)	[1]
TOTAL STOCKHOLDERS' EQUITY	93,676	86,222	[1]
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 198,996	$ 176,491	[1]

[1] The Condensed Consolidated Balance Sheet as of December 31, 2013 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements.