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Other Operating Expense, Net (Tables)
6 Months Ended
Jan. 31, 2021
Other Income and Expenses [Abstract]  
Schedule of other operating expense, net
  

Three Months Ended
January 31,

  

Six Months Ended
January 31,

 
  

2021

  

2020

  

2021

  

2020

 
   (in thousands) 
Corporate—Straight Path Communications Inc. class action legal fees net of insurance claims   $(306)  $(160)  $(4)  $(421)
net2phone-UCaaS—other, net    (100)   (63)   (100)   (63)
Traditional Communications—gain from sale of rights under class action lawsuit    2,000        2,000     
Traditional Communications—net2phone indemnification claim    (387)   (169)   (387)   (534)
Traditional Communications—Carrier Services settlement    
    
    (554)   
 
Traditional Communications—accrual for non-income related taxes related to a foreign subsidiary    
    
    
    (2,150)
Total other operating gain (expense), net   $1,207   $(392)  $955   $(3,168)