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Schedule of Other Operating (Expense) Gain, Net (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 31, 2022
Jul. 31, 2021
Jul. 31, 2020
Other Income and Expenses [Abstract]      
Corporate —Straight Path Communications Inc. class action legal fees $ (7,671) $ (2,876) $ (3,658)
Corporate —Straight Path Communications Inc. class action insurance claims 6,635 3,101 3,127
Fintech—other 20 45
net2phone—write-off of contingent consideration liability 303
net2phone—other (10) (100) (638)
Traditional Communications—gain from sale of rights under class action lawsuit 2,000
Traditional Communications—net2phone indemnification claim (96) (472) (1,244)
Traditional Communications— accrual for non-income related taxes related to a foreign subsidiary (2,150)
Traditional Communications—other (7) (967) (500)
TOTAL $ (826) $ 731 $ (5,063)