Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	9 Months Ended	12 Months Ended
	Apr. 30, 2011	Jul. 31, 2010
Current assets
Cash and cash equivalents	$ 77,245	$ 31,254
Short-term investments	133,553	124,167
Accounts receivable, net	67,464	41,269
Inventory	20,685	15,159
Deferred costs	6,703	5,451
Prepaids and other	4,311	5,108
Total current assets	309,961	222,408
Property and equipment, net	12,530	9,919
Goodwill	33,143	7,656
Intangible assets, net	22,915	9,287
Other assets	2,140	1,437
Total assets	380,689	250,707
Current liabilities
Accounts payable	10,486	8,082
Accrued liabilities	48,840	36,458
Income taxes payable	819	519
Deferred revenue, current	49,848	43,422
Total current liabilities	109,993	88,481
Deferred revenue, long-term	12,340	10,976
Other long-term liabilities	750	595
Total liabilities	123,083	100,052
Commitments and contingencies (Note 13)
Stockholders' equity
Common stock: $0.0001 par value; 350,000 shares authorized at April 30, 2011 and July 31, 2010 , respectively; 103,819 and 93,606 shares issued and outstanding at April 30, 2011 and July 31, 2010, respectively	10	9
Additional paid-in capital	430,564	326,178
Accumulated other comprehensive income	159	98
Accumulated deficit	(173,127)	(175,630)
Total stockholders' equity	257,606	150,655
Total liabilities and stockholders' equity	$ 380,689	$ 250,707