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Related Party Transactions (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Apr. 30, 2018
Apr. 30, 2017
Related Party Transactions [Abstract]        
Payments by IDT on behalf of the Company $ 14 $ 160 $ 274 $ 798
Cash repayments, net of advances $ (26) $ (181) $ (313) $ (1,041)