Other Operating Expense, Net (Details 1) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Oct. 31, 2018	Jan. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Other operating expense			$ (7,726)	$ (2,398)	$ (10,475)
Accrued expense Increase (Decrease)			127,834	130,225
Deferred income tax assets			4,589	5,668
Provision for income taxes	$ (1,200)	$ 3,300	123	$ 2,902	$ (2,021)
Correction Restatement [Member]
Other operating expense			8,000
Accrued expense Increase (Decrease)			8,000
Deferred income tax assets			2,000
Provision for income taxes			(2,000)
Correction Restatement [Member] | October 31, 2019 [Member]
Other operating expense			1,100
Accrued expense Increase (Decrease)			1,100
Deferred income tax assets			250
Provision for income taxes			(250)
Correction Restatement [Member] | January 31, 2019 [Member]
Other operating expense			2,000
Accrued expense Increase (Decrease)			2,000
Deferred income tax assets			500
Provision for income taxes			(500)
Correction Restatement [Member] | April 30, 2019 [Member]
Other operating expense			2,300
Accrued expense Increase (Decrease)			2,300
Deferred income tax assets			600
Provision for income taxes			(600)
Correction Restatement [Member] | July 31, 2019 [Member]
Other operating expense			2,600
Accrued expense Increase (Decrease)			2,600
Deferred income tax assets			650
Provision for income taxes			$ (650)