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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

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