CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Apr. 30, 2012
Current assets:
Cash and cash equivalents	$ 25,045	$ 74,367
Restricted cash	604	500
Short-term investments	70,290	50,834
Accounts receivable, net of allowance for doubtful accounts of $2,668 and $788 as of April 30, 2013 and 2012, respectively.	29,261	17,977
Prepaid expenses and other current assets	6,632	3,873
Total current assets	131,832	147,551
Property, equipment and capitalized internal-use software development costs, net	14,593	8,868
Goodwill	141,833
Acquired intangible assets, net	51,924
Other non-current assets	1,761	448
Total assets	341,943	156,867
Current liabilities:
Accounts payable	6,637	2,523
Accrued expenses and other current liabilities	32,390	12,725
Deferred revenue	54,854	42,152
Total current liabilities	93,881	57,400
Deferred revenue less current portion	2,049	3,434
Deferred tax liability, long-term	2,032	31
Other liabilities, long-term	2,632	2,404
Total liabilities	100,594	63,269
Commitments and contingencies (Note 15)
Stockholders' equity:
Common stock-$0.0001 par value; 150,000,000 shares authorized, 73,925,136 shares issued and 73,675,136 shares outstanding as of April 30, 2013; 150,000,000 shares authorized, 58,779,937 shares issued and 58,529,937 shares outstanding at April 30, 2012	7	6
Treasury stock, at cost-250,000 shares at April 30, 2013 and 2012
Additional paid-in capital	370,397	158,769
Accumulated other comprehensive loss	(146)	(20)
Accumulated deficit	(128,909)	(65,157)
Total stockholders' equity	241,349	93,598
Total liabilities and stockholders' equity	$ 341,943	$ 156,867