Quarterly report pursuant to Section 13 or 15(d)

Goodwill and intangible assets (Details) - Schedule of change in the carrying amount of intangible assets

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Goodwill and intangible assets (Details) - Schedule of change in the carrying amount of intangible assets - USD ($)
$ in Thousands
9 Months Ended
Apr. 30, 2020
Apr. 30, 2019
Schedule of change in the carrying amount of intangible assets [Abstract]    
Gross, Beginning Balance $ 27,238  
Accumulated Amortization, Beginning Balance (26,206)  
Net, Beginning Balance 1,032  
Amortization expense, Accumulated Amortization (451) $ (741)
Amortization expense, Net (451) $ (741)
Foreign currency translation, Gross 47  
Foreign currency translation, Accumulated Amortization (40)  
Foreign currency translation, Net 7  
Gross, Ending Balance 27,285  
Accumulated Amortization, Ending Balance (26,697)  
Net, Ending Balance $ 588