Future Minimum Rental Payments under Capital and Operating Leases (Detail) $ in Thousands	Jul. 31, 2015 USD ($)
Capital and Operating Leased Assets [Line Items]
For the fiscal year ending July 31, 2016	$ 995
For the fiscal year ending July 31, 2017	980
For the fiscal year ending July 31, 2018	985
For the fiscal year ending July 31, 2019	976
For the fiscal year ending July 31, 2020	972
For the fiscal year ending July 31, 2021 and thereafter	7,213
Total minimum lease payments	12,121
Less amount representing interest	4,979
Present value of net minimum capital lease payments	7,142
Present value of net minimum capital lease payments	7,142
Less current portion	321
Long-term capital lease obligations	6,821
For the fiscal year ending July 31, 2016	2,490
For the fiscal year ending July 31, 2017	1,993
For the fiscal year ending July 31, 2018	1,409
For the fiscal year ending July 31, 2019	752
For the fiscal year ending July 31, 2020	676
For the fiscal year ending July 31, 2021 and thereafter	6,176
Total minimum lease payments	$ 13,496