Investment in Rafael Pharmaceuticals, Inc. (Tables)

12 Months Ended

Jul. 31, 2017

Investment in Rafael Pharmaceuticals, Inc. [Abstract]

Schedule of consolidated balance sheets

July 31 (in thousands)	2017		2016
Convertible promissory note (at fair value)	$	6,300	$	2,000
Warrants (at cost)		5,400		—
Right to receive additional shares (at cost)		400		—
Total investment in Rafael	$	12,100	$	2,000