CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Stockholders' (deficit) equity, beginning balance at Jul. 31, 2019	$ 186,893	$ 5	$ 1,835,528	$ 669	$ (1,649,309)
Stockholders' equity, beginning balance (in shares) at Jul. 31, 2019		188,595,000
Increase (Decrease) in Stockholders' Deficit
Issuance of common stock through employee equity incentive plans	7,024		7,024
Issuance of common stock through employee equity incentive plans (in shares)		10,034,000
Issuance of common stock from ESPP purchase	50,630		50,630
Issuance of common stock from ESPP purchase (in shares)		3,320,000
Stock-based compensation	351,998		351,998
Other comprehensive income (loss)	1,361			1,361
Net loss	(872,883)				(872,883)
Stockholders' (deficit) equity, ending balance at Jul. 31, 2020	(274,977)	$ 5	2,245,180	2,030	(2,522,192)
Stockholders' equity, ending balance (in shares) at Jul. 31, 2020		201,949,000
Increase (Decrease) in Stockholders' Deficit
Issuance of common stock through employee equity incentive plans	15,601		15,601
Issuance of common stock through employee equity incentive plans (in shares)		13,457,000
Issuance of common stock from ESPP purchase	50,167		50,167
Issuance of common stock from ESPP purchase (in shares)		3,980,000
Repurchase and retirement of common stock	(125,079)		(54,176)		(70,903)
Repurchase and retirement of common stock (in shares)		(5,176,000)
Stock-based compensation	358,545		358,545
Other comprehensive income (loss)	(2,038)			(2,038)
Net loss	(1,034,260)				(1,034,260)
Stockholders' (deficit) equity, ending balance at Jul. 31, 2021	(1,012,041)	$ 5	2,615,317	(8)	(3,627,355)
Stockholders' (deficit) equity, ending balance (ASU 2020-06) at Jul. 31, 2021	$ (48,013)		(148,598)		100,585
Stockholders' equity, ending balance (in shares) at Jul. 31, 2021	214,210,000	214,210,000
Increase (Decrease) in Stockholders' Deficit
2026 Notes derivative liability reclassification	$ 698,213		698,213
Issuance of common stock through employee equity incentive plans	6,480	$ 1	6,479
Issuance of common stock through employee equity incentive plans (in shares)		11,270,000
Issuance of common stock from ESPP purchase	62,633		62,633
Issuance of common stock from ESPP purchase (in shares)		2,827,000
Repurchase and retirement of common stock	(58,570)		(14,852)		(43,718)
Repurchase and retirement of common stock (in shares)		(1,369,000)
Unwinding of 2023 Notes hedges	39,880		39,880
Unwinding of 2023 Notes warrants	(18,390)		(18,390)
Stock-based compensation	343,246		343,246
Other comprehensive income (loss)	(6,068)			(6,068)
Net loss	(797,538)				(797,538)
Stockholders' (deficit) equity, ending balance at Jul. 31, 2022	$ (790,168)	$ 6	$ 3,583,928	$ (6,076)	$ (4,368,026)
Stockholders' equity, ending balance (in shares) at Jul. 31, 2022	226,938,000	226,938,000