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Stock-Based Compensation (Stock Options) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Oct. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Weighted Average Remaining Contractual Term (Years)
Outstanding, Ending Balance			2 years 5 months 15 days
Aggregated Intrinsic Value
Outstanding, Ending Balance	$ 716,000		$ 716,000
Stock options
Awards (In Shares)
Outstanding, Beginning Balance (in shares)	1,015,965	1,073,435	1,073,435
Expired/canceled (in shares)	(10,030)	(56,250)
Outstanding, Ending Balance (in shares)	1,005,935	1,015,965	1,005,935
Exercisable, Ending Balance (in shares)	888,575		888,575
Vested and Expected to Vest, Ending Balance (in shares)	999,147		999,147
Weighted Average Exercise Price (Per Share)
Outstanding, Beginning Balance (in dollars per share)	$ 25.66	$ 25.76	$ 25.76
Expired/canceled (in dollars per share)	27.14	27.59
Outstanding, Ending Balance (in dollars per share)	25.65	$ 25.66	25.65
Exercisable, Ending Balance (in dollars per share)	26.68		26.68
Vested and Expected to Vest, Ending Balance (in dollars per share)	$ 25.70		$ 25.70
Weighted Average Remaining Contractual Term (Years)
Exercisable, Ending Balance			1 year 8 months 4 days
Vested And Expected To Vest, Ending Balance			2 years 5 months 1 day
Aggregated Intrinsic Value
Exercisable, Ending Balance	$ 429,000		$ 429,000
Vested and Expected to Vest, Ending Balance	$ 699,000		$ 699,000
Additional Disclosures
Exercise price, lower range limit (in dollars per share)			$ 17.88
Exercise price, upper range limit (in dollars per share)			$ 33.94
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		(1,220)
Exercised (in dollars per share)		$ 17.88
Total intrinsic value relating to stock-based awards exercised during the period			$ 7,000	$ 0
Stock options | Maximum
Additional Disclosures
Contractual term (in years)			10 years
Stock options | Tranche Two
Additional Disclosures
Vesting period			5 years

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