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Other Assets (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 07, 2015
Nov. 30, 2016
Investments in and Advances to Affiliates [Line Items]    
Purchase of non-transferable warrants $ 2.0  
Affiliated Entity    
Investments in and Advances to Affiliates [Line Items]    
Write-off of investment   $ 2.0