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Rafael Holdings, Inc. Spin-Off (Tables)
3 Months Ended
Oct. 31, 2018
Rafael Holdings, Inc. Spin-Off [Member]  
Schedule of consolidated statements of operations
  Three Months Ended
October 31,
 
  2018  2017 
  (in thousands) 
    
Loss before income taxes $  $(539)
         
Loss before income taxes attributable to IDT Corporation $  $(498)