Quarterly report pursuant to Section 13 or 15(d)

Net Income (loss) per share (Details)

v3.22.0.1
Net Income (loss) per share (Details) - shares
3 Months Ended 6 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2022
Jan. 31, 2021
Net Income (loss) per share (Details) [Line Items]        
Potential common shares 499,000   527,000  
Weighted average stock options   47,000   23,000
Purchase common shares 1,091,000   942,000  
Out of The Money [Member]        
Net Income (loss) per share (Details) [Line Items]        
Purchase common shares   2,264,000   2,122,000