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Property And Equipment (Schedule Of Property And Equipment, Net) (Details) - USD ($)
$ in Thousands
Feb. 28, 2017
Aug. 31, 2016
Property Plant And Equipment [Line Items]    
Subtotal $ 45,522 $ 33,852
Less: accumulated depreciation and amortization (23,229) (22,307)
Total 22,293 11,545
Machinery, Equipment and Vehicles [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 15,730 14,892
Buildings And Improvements [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 4,136 4,223
Computer And Office Equipment [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 3,613 3,605
Software [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 7,773 7,392
Furniture And Fixtures [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 1,238 1,286
Capital In Progress [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 12,785 2,200
Land [Member]    
Property Plant And Equipment [Line Items]    
Subtotal $ 247 $ 254