Stock-Based Compensation (Status for Options Which Contain Vesting Provisions) (Details) - $ / shares	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Options
Balance as of beginning of year (in shares)	1,844,890
Granted (in shares)	898,726
Vested (in shares)	(893,304)
Forfeited (in shares)	(40,839)
Balance as of ending of year (in shares)	1,809,473	1,844,890
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 10.79
Granted (in dollars per share)	14.24	$ 10.23	$ 10.93
Vested (in dollars per share)	11.15
Forfeited (in dollars per share)	11.88
Ending balance (in dollars per share)	$ 12.31	$ 10.79