Rafael Holdings, Inc. Spin-Off (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Jul. 31, 2017
Cash and cash equivalents	$ 6,833	$ 5,716
Other assets	5,765	5,134
Current liabilities	(138,324)	$ (115,318)
Rafael Holdings [Member]
Cash and cash equivalents	9,287
Marketable securities	32,989
Trade accounts receivable	53
Other current assets	2,329
Property, plant and equipment, net	50,624
Investments	17,650
Other assets	2,240
Current liabilities	(159)
Other liabilities	(94)
Noncontrolling interests	(8,653)
Rafael equity	$ 106,266