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Property And Equipment (Schedule Of Property And Equipment, Net) (Details) - USD ($)
$ in Thousands
Nov. 30, 2016
Aug. 31, 2016
Property Plant And Equipment [Line Items]    
Subtotal $ 44,752 $ 33,852
Less: accumulated depreciation and amortization (22,736) (22,307)
Total 22,016 11,545
Machinery, Equipment and Vehicles [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 15,336 14,892
Buildings And Improvements [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 4,128 4,223
Computer And Office Equipment [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 3,720 3,605
Software [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 7,704 7,392
Furniture And Fixtures [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 1,232 1,286
Capital In Progress [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 12,385 2,200
Land [Member]    
Property Plant And Equipment [Line Items]    
Subtotal $ 247 $ 254