Income Taxes (Details 2) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Oct. 31, 2018	Jan. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Current:
Federal				$ 3,294
State and local			(15)	(34)	(26)
Foreign			971	11	(282)
Current income tax expense benefit			956	3,271	(308)
Deferred:
Federal					(9,536)
State and local			1	12	(66)
Foreign			(1,080)	(6,185)	11,931
Deferred income tax expense benefit			(1,079)	(6,173)	2,329
(PROVISION FOR) BENEFIT FROM INCOME TAXES	$ 1,200	$ (3,300)	$ (123)	$ (2,902)	$ 2,021