Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Income Tax Disclosure [Abstract]
U.S. federal income tax at statutory rate	$ (163,438)	$ (213,391)	$ (179,514)
Change in valuation allowance	117,292	171,270	164,453
Non-deductible item on fair value remeasurement derivative liability	41,589	56,546	0
Stock-based compensation	14,462	4,663	30,913
Effect of foreign operations	11,210	9,851	12,676
Research and development tax credits	(9,455)	(14,694)	(19,210)
Non-deductible expenses	6,646	1,739	5,393
Change in unrecognized tax benefit	655	2,631	1,863
State income taxes	77	99	79
Transfer pricing adjustments	0	0	7
Other	226	(227)	1,002
Total	$ 19,264	$ 18,487	$ 17,662