Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

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Commitments and Contingencies - Additional Information (Detail) - Jul. 31, 2015 - Demand Debt Instrument [Member] - Line of Credit [Member] - USD ($)
Total
Contingencies And Commitments [Line Items]  
Demand notes payable $ 20,000,000
Line of credit expiration date Nov. 30, 2015