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Related Party Transactions (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Related Party Transactions [Abstract]    
Balance at beginning of year $ 299 $ 369
Payments by IDT on behalf of the Company 937 2,122
Cash repayments, net of advances (1,200) (2,192)
Balance at end of year $ 36 $ 299