Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details) - Schedule of share-based payment arrangement, cost by plan

v3.20.1
Stockholders' Equity (Details) - Schedule of share-based payment arrangement, cost by plan - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Apr. 30, 2020
Apr. 30, 2019
Apr. 30, 2020
Apr. 30, 2019
Stockholders' Equity (Details) - Schedule of share-based payment arrangement, cost by plan [Line Items]        
Share-based compensation expense $ 207 $ 291 $ 728 $ 526
Stock options [Member]        
Stockholders' Equity (Details) - Schedule of share-based payment arrangement, cost by plan [Line Items]        
Share-based compensation expense 206 289 724 521
Restricted Stocks [Member]        
Stockholders' Equity (Details) - Schedule of share-based payment arrangement, cost by plan [Line Items]        
Share-based compensation expense $ 1 $ 2 $ 4 $ 5