The Company and Summary of Significant Accounting Policies and Estimates (Details Textual) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended						1 Months Ended		1 Months Ended
	Apr. 30, 2013 customer	Apr. 30, 2012 customer	Apr. 30, 2013 customer	Apr. 30, 2012 customer	Jul. 31, 2012 customer	Apr. 30, 2013 Restricted Stock Units (RSUs)	Apr. 30, 2013 Stock Options [Member]	Apr. 30, 2013 Minimum	Apr. 30, 2013 Minimum Licensing Agreements [Member]	Apr. 30, 2013 Maximum [Member]	Apr. 30, 2013 Maximum [Member] Licensing Agreements [Member]	Apr. 30, 2012 Follow-on Public Offerings	Apr. 24, 2012 Follow-on Public Offerings	Jan. 31, 2012 IPO	Jan. 30, 2012 IPO	Jan. 30, 2012 IPO Common Stock [Member]	Jan. 30, 2012 IPO Preferred Stock
Company and Summary of Significant Accounting Policies and Estimates (Textual) [Abstract]
Issuance of common stock under public offering (in shares)												750,000		10,177,500
Issuance of common stock under initial public offering to underwriters (in shares)														1,327,500
Stock sold during period secondary offerings by selling stockholders' shares (in shares)												8,450,000
Stock issued during period secondary offering shares (in shares)												9,200,000
Price of common stock under public offerings													$ 28.25		$ 13.00
Proceeds from issuance of common stock in connection with stock offerings, net of underwriting discounts and commission			$ 0	$ 143,386,000								$ 20,400,000		$ 123,000,000
Offering expenses related to public offering												1,000,000		3,500,000
Capitalized costs related public offering expense													700,000		2,800,000
Conversion of convertible preferred stock (in shares)															25,357,721
Outstanding warrants (in shares)																69,529	69,529
Warrant purchase price																5.03	5.03
Number of Customers Concentration Of Credit Risk	0	0	0	0
Percentage of Revenue	10.00%	10.00%	10.00%	10.00%
Number of Customers Concentration of Credit Risk Receivables	1		1		0
Percentage of accounts receivable	12.00%		12.00%		10.00%
Range of General Payment Terms								30 days		90 days
Period of standard license agreement term									3 years		7 years
Adjustment for license revenues	0	100,000	3,200,000	900,000
Adjustment for service revenues	$ 0	$ 200,000	$ 1,700,000	$ 900,000
Period of RSUs time based Vesting						4 years
Period which satisfies performance based condition required for vesting of RSUs after our IPO						180 days
Period of expiration for share based payment awards							10 years