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Fair Value - Summary of Assets and Liabilities Measured at Fair Value on Recurring basis (Details) - Recurring Basis - USD ($)
$ in Thousands
Nov. 30, 2017
Nov. 30, 2016
Assets    
Derivative financial instruments   $ 897
Derivative Liability, Current $ 1,603  
Total assets 1,603 897
Level 2    
Assets    
Derivative financial instruments   897
Derivative Liability, Current 1,603  
Total assets $ 1,603 $ 897