Quarterly report pursuant to Section 13 or 15(d)

Summary of Stock Option Activity (Details)

v3.22.2.2
Summary of Stock Option Activity (Details)
 3 Months Ended
Oct. 31, 2022
USD ($)
$ / shares
shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Options Outstanding, Ending Balance 129,261 
2011 Plan [Member]  
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]  
Options Outstanding, Beginning Balance 133,973 
Weighted Average Exercise Price, Outstanding Beginning Balance | $ / shares $ 57.34 
Options, Granted 2,273 
Weighted Average Exercise Price, Granted | $ / shares $ 9.94 
Options, Forfeited/Cancelled (6,985) 
Weighted Average Exercise Price, Forfeited/Cancelled | $ / shares $ 133.46 
Options Outstanding, Ending Balance 129,261 
Weighted Average Exercise Price, Outstanding Ending Balance | $ / shares $ 52.39 
Weighted Average Remaining Contract, Outstanding Ending Balance 8 years 3 months 18 days 
Aggregate Intrinsic Value Outstanding Ending Balance | $  
Options Outstanding, Ending Balance 104,238 
Weighted Average Exercise Price, Outstanding Ending Balance | $ / shares $ 56.79 
Weighted Average Remaining Contract, Outstanding Ending Balance 8 years 1 month 6 days 
Aggregate Intrinsic Value Exercisable Ending Balance | $