Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012	Apr. 30, 2012
Current assets:
Cash and cash equivalents	$ 68,145	$ 74,367
Restricted cash	604	500
Short-term investments	74,660	50,834
Accounts receivable, net of allowance for doubtful accounts of $878 and $788, as of July 31, 2012, and April 30, 2012, respectively	18,409	17,977
Prepaid expenses and other current assets	3,624	3,873
Total current assets	165,442	147,551
Property, equipment, and capitalized software, net	11,339	8,868
Goodwill	112,700
Acquired intangibles, net	40,481
Other non-current assets	393	448
Total assets	330,355	156,867
Current liabilities:
Accounts payable	4,754	2,523
Accrued expenses and other current liabilities	12,704	12,725
Deferred revenue	46,450	42,152
Total current liabilities	63,908	57,400
Deferred revenue less current portion	2,684	3,434
Deferred tax liability, non-current	1,357	31
Other liabilities, non-current	2,605	2,404
Total liabilities	70,554	63,269
Commitments and contingencies (Note 9)
Stockholders' equity:
Common stock - $0.0001 par value; 150,000,000 shares authorized, 69,029,568 shares issued and 68,779,568 shares outstanding as of July 31, 2012,150,000,000 shares authorized, 58,779,937 shares issued and 58,529,937 shares outstanding as of April 30, 2012	7	6
Treasury stock, at cost - 250,000 shares at July 31, 2012 and April 30, 2012
Additional paid-in capital	343,602	158,769
Accumulated other comprehensive income (loss)	(112)	(20)
Accumulated deficit	(83,696)	(65,157)
Total stockholders' equity	259,801	93,598
Total liabilities and stockholders' equity	$ 330,355	$ 156,867