Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Apr. 30, 2013
Current assets:
Cash and cash equivalents	$ 26,740	$ 25,045
Restricted cash	604	604
Short-term investments	58,053	70,290
Accounts receivable, net of allowance for doubtful accounts of $2,071 and $2,668 as of July 31, 2013 and April 30, 2013, respectively	26,188	29,261
Prepaid expenses and other current assets	6,973	6,632
Total current assets	118,558	131,832
Property, equipment and capitalized internal-use software development costs, net	16,827	14,593
Goodwill	141,833	141,833
Acquired intangible assets, net	50,170	51,924
Other non-current assets	2,271	1,761
Total assets	329,659	341,943
Current liabilities:
Accounts payable	6,156	6,637
Accrued expenses and other current liabilities	34,659	32,390
Deferred revenue	52,973	54,854
Total current liabilities	93,788	93,881
Deferred revenue less current portion	1,498	2,049
Deferred tax liability, long-term	2,032	2,032
Other liabilities, long-term	2,387	2,632
Total liabilities	99,705	100,594
Commitments and contingencies (Note 9)
Stockholders' equity:
Common stock - $0.0001 par value; 150,000,000 shares authorized, 74,650,186 shares issued and 74,400,186 shares outstanding as of July 31, 2013; 150,000,000 shares authorized, 73,925,136 shares issued and 73,675,136 shares outstanding at April 30, 2013	7	7
Treasury stock, at cost - 250,000 shares at July 31, 2013 and April 30, 2013
Additional paid-in capital	376,479	370,397
Accumulated other comprehensive loss	(255)	(146)
Accumulated deficit	(146,277)	(128,909)
Total stockholders' equity	229,954	241,349
Total liabilities and stockholders' equity	$ 329,659	$ 341,943