Annual report pursuant to Section 13 and 15(d)

Accrued Liabilities (Details)

v3.20.2
Accrued Liabilities (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Apr. 30, 2020
Jul. 31, 2020
Jul. 31, 2019
Payables and Accruals [Abstract]      
Payment advance $ 2,526    
Accrual, real and personal property taxes, uncertainty   25%  
Accrued liabilities and other liabilities   $ 300 $ 200