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Schedule of Other Operating Expense, Net (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jan. 31, 2023
Jan. 31, 2022
Jan. 31, 2023
Jan. 31, 2022
Other Income and Expenses [Abstract]        
Corporate—Straight Path Communications Inc. class action legal fees $ (1,597) $ (2,694) $ (4,109) $ (3,671)
Corporate—Straight Path Communications Inc. class action insurance claims 1,263 1,972 2,988 2,887
Fintech—write-off of contingent consideration liability 1,565
Fintech— government grants 349 382
net2phone—write-off of contingent consideration liability 303 303
net2phone—other (10) (10)
Traditional Communications— cable telephony customer indemnification claim (1) (12) (12) (36)
Traditional Communications—other 3 (1) 2 (3)
Total other operating gain (expense), net $ 17 $ (442) $ 816 $ (530)