Goodwill and intangible assets (Details) - Schedule of Indefinite-Lived Intangible Assets $ in Thousands	6 Months Ended
	Jan. 31, 2021 USD ($)
Schedule of Indefinite-Lived Intangible Assets [Abstract]
Gross, Beginning Balance	$ 27,686
Accumulated Amortization, Beginning Balance	(27,148)
Net, Beginning Balance	538
Amortization expense, Gross
Amortization expense, Accumulated Amortization	(151)
Amortization expense, Net	(151)
Foreign currency translation, Gross	168
Foreign currency translation, Accumulated Amortization	(162)
Foreign currency translation, Net	6
Gross, Ending Balance	27,854
Accumulated Amortization, Ending Balance	(27,461)
Net, Ending Balance	$ 393