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Proposed Spin-Off of Rafael Holdings, Inc. and Investment in Rafael Pharmaceuticals, Inc. (Tables)
3 Months Ended
Oct. 31, 2017
Proposed Spin-Off of Rafael Holdings, Inc. and Investment in Rafael Pharmaceuticals, Inc. [Abstract]  
Schedule of consolidated balance sheets
  October 31,
2017
  July 31,
2017
 
  (in thousands) 
Series D Note (at fair value) $6,300  $6,300 
Warrants (at cost)  5,400   5,400 
Right to receive additional shares (at cost)     400 
Total investment in Rafael Pharma $11,700  $12,100