Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (57,706)	$ (202,335)	$ (390,278)
Available-for-sale securities:
Change in net unrealized gains (losses) on available-for-sale securities	9,948	1,592	(12,083)
Cash flow hedging instruments:
Change in net unrealized gains (losses)	(10,761)	11,103	(20,130)
Net realized (gains) losses reclassified into net loss	(2,400)	11,579	7,013
Net change on cash flow hedges	(13,161)	22,682	(13,117)
Other comprehensive income (loss)	(3,213)	24,274	(25,200)
Comprehensive loss	$ (60,919)	$ (178,061)	$ (415,478)