Quarterly report pursuant to Section 13 or 15(d)

Net income (loss) per share (Details)

v3.20.4
Net income (loss) per share (Details) - shares
3 Months Ended 6 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Jan. 31, 2021
Jan. 31, 2020
Net income (loss) per share (Details) [Line Items]        
Weighted average stock options of diluted weighted average shares outstanding 47,000   23,000  
Unvested Restricted Stock [Member]        
Net income (loss) per share (Details) [Line Items]        
Antidilutive securities excluded from computation of earnings per share, amount   0   64,000
Out of the money options [Member]        
Net income (loss) per share (Details) [Line Items]        
Antidilutive securities excluded from computation of earnings per share, amount 2,264,000 1,897,000 2,122,000 1,606,000