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Property, Building and Equipment, net (Details) (USD $)	3 Months Ended		3 Months Ended
Property, Building and Equipment, net (Details) (USD $)	Oct. 31, 2013	Jul. 31, 2013	Oct. 31, 2013 Minimum [Member]	Oct. 31, 2013 Maximum [Member]	Oct. 31, 2013 Computer Software [Member]	Oct. 31, 2012 Computer Software [Member]
Property, Plant and Equipment [Line Items]
Expected capitalized cost			$ 1,500,000	$ 2,000,000
Software impairment charge	0
Unamortized software development costs		2,700,000
Amortization expense					$ 700,000	$ 100,000

For each income statement presented, the amount charged to expense for write-downs of capitalized computer software costs to net realizable value.

The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.