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Stockholders' Equity - Activity for RSA’s and RSU’s (Details)
 12 Months Ended
Jul. 31, 2022
$ / shares
shares
Restricted Shares [Roll Forward]  
Outstanding (in shares) | shares 102,000
Grants (in shares) | shares 142,000
Vested (in shares) | shares (49,000)
Forfeitures or expirations (in shares) | shares (18,000)
Outstanding (in shares) | shares 177,000
Weighted Average Grant Date Fair Value  
Outstanding (in dollars per share) | $ / shares $ 90.46
Grants (in dollars per share) | $ / shares 133.53
Vested (in dollars per share) | $ / shares 98.96
Forfeitures or expirations (in dollars per share) | $ / shares 112.18
Outstanding (in dollars per share) | $ / shares $ 120.56