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Balance Sheet Components - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Nov. 30, 2016
Aug. 31, 2016
Property, Plant and Equipment    
Total property, plant and equipment $ 56,782 $ 57,110
Less: Accumulated depreciation and amortization (48,331) (48,297)
Property, plant and equipment, net 8,451 8,813
Buildings and improvements    
Property, Plant and Equipment    
Total property, plant and equipment 12,764 12,822
Machinery and equipment    
Property, Plant and Equipment    
Total property, plant and equipment 40,802 41,065
Leasehold improvements    
Property, Plant and Equipment    
Total property, plant and equipment 212 213
Other equipment    
Property, Plant and Equipment    
Total property, plant and equipment 2,188 2,198
Construction in progress    
Property, Plant and Equipment    
Total property, plant and equipment $ 816 $ 812