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Stock-Based Compensation (Performance Shares, RSUs, Restricted Stock and Share Unit Awards) (Details)
 3 Months Ended 9 Months Ended
Aug. 01, 2022
Jul. 31, 2022
Jul. 31, 2017
Apr. 30, 2025
USD ($)
$ / shares
shares
Jan. 31, 2025
$ / shares
shares
Oct. 31, 2024
$ / shares
shares
Apr. 30, 2024
USD ($)
Apr. 30, 2025
USD ($)
$ / shares
shares
Apr. 30, 2024
USD ($)
Jul. 31, 2024
USD ($)
Jul. 31, 2023
Additional Disclosures                      
Estimated forfeitures related to unvested stock-based awards       $ 459,000       $ 459,000      
Dividend Equivalents [Abstract]                      
Reversal of dividend equivalents       1,000     $ 68,000 33,000 $ 104,000    
Carrying value at period end       $ 465,639,000       $ 465,639,000   $ 426,105,000  
Performance shares, RSUs, Restricted stock and share units                      
Awards (In Shares)                      
Outstanding, Beginning Balance (in shares) | shares       1,889,391 2,621,963 1,800,288   1,800,288      
Granted (in shares) | shares       33,627 489,191 1,154,859          
Settled (in shares) | shares       (6,970) (578,751) (204,292)          
Canceled/Forfeited (in shares) | shares       (82,544) (643,012) (128,892)          
Outstanding, Ending Balance (in shares) | shares       1,833,504 1,889,391 2,621,963   1,833,504      
Vested, Ending Balance (in shares) | shares       122,554       122,554      
Vested and Expected to Vest, Ending Balance (in shares) | shares       1,766,255       1,766,255      
Weighted Average Grant Date Fair Value                      
Outstanding, Beginning Balance (in dollars per share) | $ / shares       $ 6.61 $ 8.11 $ 10.61   $ 10.61      
Granted (in dollars per share) | $ / shares       1.79 3.63 5.04          
Settled (in dollars per share) | $ / shares       10.95 9.41 11.26          
Canceled/Forfeited (in dollars per share) | $ / shares       2.74 5.48 10.61          
Outstanding, Ending Balance (in dollars per share) | $ / shares       6.68 $ 6.61 $ 8.11   6.68      
Vested, Ending Balance (in dollars per share) | $ / shares       13.23       13.23      
Vested and Expected to Vest, Ending Balance (in dollars per share) | $ / shares       $ 6.67       $ 6.67      
Aggregate Intrinsic Value                      
Outstanding, Ending Balance       $ 2,512,000       $ 2,512,000      
Vested, Ending Balance               168,000      
Vested and Expected to Vest, Ending Balance       2,420,000       2,420,000      
Additional Disclosures                      
Total intrinsic value relating to fully vested stock-based awards converted during the period       13,000     33,000 $ 2,281,000 7,478,000    
Performance shares | Employees | Granted since fiscal 2014                      
Additional Disclosures                      
Performance period (in years)               3 years      
RSUs and restricted stock | Employees                      
Additional Disclosures                      
Vesting period 3 years 5 years                  
Common stock, conversion ratio (in shares)   1                  
RSUs and restricted stock | Non-Employee Director                      
Additional Disclosures                      
Vesting period 1 year 5 years 1 year                
Common stock, conversion ratio (in shares)                     1
Dividend equivalents                      
Dividend Equivalents [Abstract]                      
Reversal of dividend equivalents       1,000       $ 33,000      
Reversal of dividend equivalents             (68,000)   (104,000)    
Paid during the period             $ 2,000 157,000 $ 267,000    
Carrying value at period end       $ 127,000       $ 127,000   $ 316,000