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Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (69,318)	$ (51,276)
Foreign currency translation adjustments	(2,701)	(724)
Unrealized gains (losses) on available-for-sale securities	(1,644)	(1,118)
Tax benefit (expense) on unrealized gains (losses) on available-for-sale securities	443	251
Reclassification adjustment for realized gains (losses) included in net income (loss)	(216)	69
Total other comprehensive income (loss)	(4,118)	(1,522)
Comprehensive income (loss)	$ (73,436)	$ (52,798)

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