Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 125,496	$ 9,633
Short-term deposits	357	4,344
Restricted cash	199	171
Trade receivables (net of allowance for doubtful accounts of $ 139 at March 31, 2014 and December 31, 2013)	14,254	28,268
Prepaid expenses and other current assets	1,610	1,357
Total current assets	141,916	43,773
Long-term assets:
Other assets	380	1,625
Property and equipment, net	2,210	1,856
Total long-term assets	2,590	3,481
Total assets	144,506	47,254
Current liabilities:
Trade payables	2,089	2,163
Accrued expenses and other liabilities	11,442	11,643
Deferred revenues	25,189	26,591
Total current liabilities	38,720	40,397
Long-term liabilities:
Deferred revenues	2,087	2,109
Warrants to purchase convertible preferred stock		2,866
Severance pay	1,415	1,101
Other liabilities	17	14
Total long-term liabilities	3,519	6,090
Share capital
Common stock of $ 0.001 par value - Authorized: 200,000,000 shares at March 31, 2014 and 26,000,000 at December 31, 2013; Issued and outstanding: 24,453,983 shares at March 31, 2014 and 3,953,314 shares at December 31, 2013	24	4
Accumulated other comprehensive loss	(22)
Additional paid-in capital	158,092	4,741
Accumulated deficit	(55,827)	(47,753)
Total stockholders' equity (deficiency)	102,267	(43,008)
Total liabilities, convertible preferred stock and stockholders' equity (deficiency)	144,506	47,254
Preferred Stock [Member]
Convertible preferred stock:
Preferred A, B, C, D and E stock of $ 0.001 par value - Authorized: no shares at March 31, 2014 and 16,986,384 shares at December 31, 2013; Issued and outstanding: no shares at March 31, 2014 and 15,082,141 shares at December 31, 2013		43,775
Share capital
Total stockholders' equity (deficiency)		$ 43,775