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Schedule of Other Operating Expense, Net (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2022
Jan. 31, 2021
net2phone-UCaaS—write-off of contingent consideration liability $ 303 $ 303
net2phone-UCaaS—other (10) (100) (10) (100)
Traditional Communications—gain from sale of rights under class action lawsuit 2,000 2,000
Traditional Communications—net2phone indemnification claim (12) (387) (36) (387)
Traditional Communications— Carrier Services settlement (554)
Traditional Communications—other (1) (3)
Total other operating (expense) gain, net (442) 1,207 (530) 955
Straight Path [Member]        
Corporate—Straight Path Communications Inc. class action legal fees (2,694) (1,397) (3,671) (1,718)
Corporate—Straight Path Communications Inc. class action insurance claims $ 1,972 $ 1,091 $ 2,887 $ 1,714