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Schedule of Other Operating Expense, Net (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Apr. 30, 2023
Apr. 30, 2022
Other Income and Expenses [Abstract]        
Corporate—Straight Path Communications Inc. class action legal fees $ (973) $ (1,410) $ (5,082) $ (5,081)
Corporate—Straight Path Communications Inc. class action insurance claims 337 1,252 3,325 4,139
Fintech—write-off of contingent consideration liability 1,565
Fintech— government grants 13 382 13
net2phone—write-off of contingent consideration liability 303
net2phone—other (10)
Traditional Communications— cable telephony customer indemnification claim (3,912) (33) (3,925) (68)
Traditional Communications—contingent consideration liability (216) (216)
Traditional Communications—other (1) 3 (5)
Total other operating expense, net $ (4,764) $ (179) $ (3,948) $ (709)