Income Taxes (Details 3) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Oct. 31, 2018	Jan. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Income Tax Disclosure [Abstract]
U.S. federal income tax at statutory rate			$ (95)	$ (2,186)	$ (2,667)
Transition tax on foreign earnings			92	(3,360)
Valuation allowance			2,008	58,798	626
Foreign tax rate differential			(2,835)	(4,272)	3,107
Nondeductible expenses			(657)	213	457
Other			1	(23)	64
Prior year tax benefit			2,271	575	494
Tax law changes			(896)	(52,631)
State and local income tax, net of federal benefit			(12)	(16)	(60)
(PROVISION FOR) BENEFIT FROM INCOME TAXES	$ 1,200	$ (3,300)	$ (123)	$ (2,902)	$ 2,021