Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 3,278	$ 11,652
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	3,182	2,147
Stock-based compensation	28,430	13,878
Excess tax benefit from exercise of stock options and vesting of RSUs	(323)	0
Deferred tax assets	(4,779)	5,617
Other Noncash Income (Expense)	272	0
Changes in operating assets and liabilities:
Accounts receivable	(15,949)	(12,397)
Prepaid expenses and other assets	403	(1,505)
Accounts payable	700	(524)
Accrued employee compensation	(5,049)	(28)
Other liabilities	1,959	(8,661)
Deferred revenues	(4,012)	(12,195)
Net cash used in operating activities	8,112	(2,016)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of available-for-sale securities	170,513	0
Proceeds from Sale of Available-for-sale Securities	57,256	0
Payments to Acquire Property, Plant, and Equipment	(7,061)	(2,118)
(Increase) Decrease in Restricted Cash	(3,520)	(2,323)
Net cash used in investing activities	(116,798)	205
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock upon exercise of stock options	7,964	3,676
Taxes remitted on RSU awards vested	(14,695)	0
Proceeds from issuance of common stock in connection with public offerings, net of underwriting discounts and commission	0	143,386
Costs paid in connection with public offerings	0	(2,582)
Excess tax benefit from exercise of stock options and vesting of RSUs	323	0
Net cash used in financing activities	(6,408)	144,480
Effect of foreign exchange rate changes on cash and cash equivalents	(94)	(444)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(115,188)	142,225
CASH AND CASH EQUIVALENTS—Beginning of period	205,718	59,625
CASH AND CASH EQUIVALENTS—End of period	90,530	201,850
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for income taxes	1,569	1,762
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Accounts payable and other liabilities related to property and equipment	953	892
Unpaid Offering Costs	0	935
Conversion of Stock, Amount Converted	$ 0	$ 36,500