Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.4
Stockholders' Equity (Details) - Schedule of amounts of share-based compensation expense - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Jan. 31, 2021
Jan. 31, 2020
Stockholders' Equity (Details) - Schedule of amounts of share-based compensation expense [Line Items]        
Share-based compensation expense $ 176 $ 302 $ 343 $ 521
Stock options [Member]        
Stockholders' Equity (Details) - Schedule of amounts of share-based compensation expense [Line Items]        
Share-based compensation expense 175 301 341 518
Restricted stock [Member]        
Stockholders' Equity (Details) - Schedule of amounts of share-based compensation expense [Line Items]        
Share-based compensation expense $ 1 $ 1 $ 2 $ 3