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Commitments and Contingencies (Details)
$ in Thousands
3 Months Ended
Nov. 30, 2016
USD ($)
claim
Nov. 30, 2015
USD ($)
Aug. 31, 2016
USD ($)
Commitments and Contingencies      
Lease expense related to operating leases $ 112 $ 82  
Future noncancellable minimum rental payments      
Remainder of 2017 356    
2018 264    
2019 109    
2020 90    
2021 30    
Total 849    
Purchase Obligations      
Purchase commitments for inventory, property, plant and equipment $ 1,500   $ 1,500
Litigation      
Pending or threatened litigation | claim 0