Equity Incentive Plans - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Number of Shares
Beginning balance (in shares)	3,334,000	7,546,000
Options granted (in shares)	0	0	0
Options exercised (in shares)	(1,643,000)	(3,712,000)
Options canceled/forfeited (in shares)	(2,000)	(500,000)
Ending balance (in shares)	1,689,000	3,334,000	7,546,000
Exercisable (in shares)	1,689,000	3,334,000
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 5.20	$ 5.10
Options granted (in dollars per share)	0	0
Options exercised (in dollars per share)	3.94	4.07
Options canceled/forfeited (in dollars per share)	13.04	12.00
Ending balance (in dollars per share)	6.43	5.20	$ 5.10
Exercisable (in dollars per share)	$ 6.43	$ 5.20
Additional Disclosures
Outstanding (in years)	1 year 10 months 24 days	2 years 9 months 18 days	3 years 7 months 6 days
Exercisable (in years)	1 year 10 months 24 days	2 years 9 months 18 days
Outstanding, intrinsic value	$ 14,707	$ 102,740	$ 129,010
Exercisable, intrinsic value	$ 14,707	$ 102,739