Annual report pursuant to Section 13 and 15(d)

Other liabilities (Details)

Other liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2018
Jul. 31, 2017
Other Liabilities and Financial Instruments Subject to Mandatory Redemption [Abstract]    
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation (in Dollars) $ 782  
Capital Lease Interest Rate Range Start 2.99%  
Capital Lease Interest Rate Range End 9.50%  
Short-term Debt, Weighted Average Interest Rate, at Point in Time 7.20% 7.50%