Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Oct. 31, 2013	Apr. 30, 2013
Current assets:
Cash and cash equivalents	$ 27,477	$ 25,045
Restricted cash	604	604
Short-term investments	47,304	70,290
Accounts receivable, net of allowance for doubtful accounts of $2,313 and $2,668 as of October 31, 2013 and April 30, 2013, respectively.	30,420	29,261
Prepaid expenses and other current assets	6,613	6,632
Total current assets	112,418	131,832
Property, equipment and capitalized internal-use software development costs, net	17,093	14,593
Goodwill	141,833	141,833
Acquired intangible assets, net	48,415	51,924
Other non-current assets	2,615	1,761
Total assets	322,374	341,943
Current liabilities:
Accounts payable	6,628	6,637
Accrued expenses and other current liabilities	33,903	32,390
Deferred revenue	51,069	54,854
Total current liabilities	91,600	93,881
Deferred revenue less current portion	1,910	2,049
Deferred tax liability, long-term	2,024	2,032
Other liabilities, long-term	2,090	2,632
Total liabilities	97,624	100,594
Commitments and contingencies (Note 10)
Stockholders' equity:
Common stock - $0.0001 par value; 150,000,000 shares authorized, 76,020,254 shares issued and 75,770,254 shares outstanding as of October 31, 2013; 150,000,000 shares authorized, 73,925,136 shares issued and 73,675,136 shares outstanding at April 30, 2013	8	7
Treasury stock, at cost - 250,000 shares at October 31, 2013 and April 30, 2013
Additional paid-in capital	385,140	370,397
Accumulated other comprehensive income (loss)	33	(146)
Accumulated deficit	(160,431)	(128,909)
Total stockholders' equity	224,750	241,349
Total liabilities and stockholders' equity	$ 322,374	$ 341,943