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Real Estate Assets (Details)
$ in Thousands
3 Months Ended 12 Months Ended 42 Months Ended
Feb. 28, 2017
USD ($)
a
Feb. 29, 2016
USD ($)
Nov. 30, 2013
USD ($)
a
Feb. 28, 2017
USD ($)
a
Nov. 30, 2016
USD ($)
Real Estate Assets          
Land $ 17,895     $ 17,895 $ 17,895
Land improvements 27,615     27,615 27,592
Buildings and improvements 164,678     164,678 164,353
Tenant improvements 22,619     22,619 21,925
Machinery and equipment 11,022     11,022 11,022
Construction in progress 2,667     2,667 1,659
Development costs 14,616     14,616 14,615
Real estate assets, gross 261,112     261,112 259,061
Accumulated depreciation (88,796)     (88,796) (86,801)
Real estate assets, net 172,316     172,316 172,260
Depreciation expense 2,095 $ 1,884      
Capitalized interest   84      
Sales          
Deferred revenue 10,180     10,180 9,526
Real estate held for sale 2,992     2,992 2,992
Windsor undeveloped land sale          
Real Estate Assets          
Development costs $ 0 0   $ 0  
Sales          
Number of acres sold | a     90    
Proceeds from sale of undeveloped land     $ 8,968    
Number of acres | a 268     268  
Percentage of cost incurred on sale of land 99.00%     99.00%  
Percentage of total revenue and pretax gain on sale have been recognized 99.00%     99.00%  
Revenue from property sales $ 0 0   $ 8,864  
Estimated total pre-tax gain 6,686        
Pretax gain on land sale 0 $ 0   6,608  
Deferred revenue 104     104  
Land.          
Sales          
Real estate held for sale $ 264     264 264
Land improvements | Minimum          
Real Estate Assets          
Estimated Useful Lives 10 years        
Land improvements | Maximum          
Real Estate Assets          
Estimated Useful Lives 30 years        
Buildings and improvements | Minimum          
Real Estate Assets          
Estimated Useful Lives 10 years        
Buildings and improvements | Maximum          
Real Estate Assets          
Estimated Useful Lives 40 years        
Machinery and equipment. | Minimum          
Real Estate Assets          
Estimated Useful Lives 3 years        
Machinery and equipment. | Maximum          
Real Estate Assets          
Estimated Useful Lives 20 years        
Development costs          
Sales          
Real estate held for sale $ 2,728     $ 2,728 $ 2,728