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Related Party Transactions - Additional Information (Detail)
Oct. 31, 2015
TLT Incorporation [Member]  
Related Party Transaction [Line Items]  
Percentage of ownership interest 50.00%
Walden Woods [Member]  
Related Party Transaction [Line Items]  
Percentage of ownership interest 31.30%
Walden Woods [Member] | Majority Shareholder [Member]  
Related Party Transaction [Line Items]  
Percentage of ownership interest 51.00%
President [Member] | TLT Incorporation [Member] | Minimum Range [Member]  
Related Party Transaction [Line Items]  
Percentage of ownership interest 24.75%
President [Member] | TLT Incorporation [Member] | Maximum Range [Member]  
Related Party Transaction [Line Items]  
Percentage of ownership interest 49.50%
Executive Vice President [Member] | TLT Incorporation [Member] | Minimum Range [Member]  
Related Party Transaction [Line Items]  
Percentage of ownership interest 49.50%
Executive Vice President [Member] | TLT Incorporation [Member] | Maximum Range [Member]  
Related Party Transaction [Line Items]  
Percentage of ownership interest 57.75%