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Other Operating Expense, Net (Tables)
3 Months Ended
Oct. 31, 2020
Other Income and Expenses [Abstract]  
Schedule of other operating expense, net
   Three Months Ended
October 31,
 
   2020   2019 
   (in thousands) 
Corporate—Straight Path Communications Inc. class action insurance claims net of legal fees/(legal fees net of insurance claims)  $302   $(260)
Traditional Communications—Carrier Services settlement   (554)   
 
Traditional Communications—net2phone indemnification claim   
    (365)
Traditional Communications—accrual for non-income related taxes related to a foreign subsidiary   
    (2,150)
Total other operating expense, net  $(252)  $(2,775)