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Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (40,681)	$ (8,652)	$ (91,957)	$ (28,842)
Foreign currency translation adjustments	(2,363)	2,726	(3,087)	2,032
Unrealized gains (losses) on available-for-sale securities	(2,537)	(1,210)	(3,655)	(3,049)
Tax benefit (expense) on unrealized gains (losses) on available-for-sale securities	603	214	854	573
Reclassification adjustment for realized gains (losses) included in net income (loss)	23	320	92	667
Total other comprehensive income (loss)	(4,274)	2,050	(5,796)	223
Comprehensive income (loss)	$ (44,955)	$ (6,602)	$ (97,753)	$ (28,619)

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