Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details) - Schedule of share-based compensation expense

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Stockholders' Equity (Details) - Schedule of share-based compensation expense - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2020
Jan. 31, 2019
Stockholders' Equity (Details) - Schedule of share-based compensation expense [Line Items]        
Share-based compensation expense $ 302 $ 291 $ 521 $ 526
Options [Member]        
Stockholders' Equity (Details) - Schedule of share-based compensation expense [Line Items]        
Share-based compensation expense 301 289 518 521
Restricted Stocks [Member]        
Stockholders' Equity (Details) - Schedule of share-based compensation expense [Line Items]        
Share-based compensation expense $ 1 $ 2 $ 3 $ 5