Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Total
Balance at Dec. 31, 2023	$ 11	$ 3,145,837	$ (2,377,436)	$ (3,085)	$ 765,327
Balance (in shares) at Dec. 31, 2023	119,581
Issuance of common stock upon exercise of stock options		10,368			10,368
Issuance of common stock upon exercise of stock options (in shares)	1,325
Issuance of common stock under the employee stock purchase plan		8,862			8,862
Issuance of common stock under the employee stock purchase plan (in shares)	263
Issuance of common stock for bonus		24,071			24,071
Issuance of common stock for bonus (in shares)	270
Vesting of restricted stock units	$ 1				1
Vesting of restricted stock units (in shares)	2,698
Stock based compensation		204,231			204,231
Unrealized (loss) gain on available-for sale securities				2,320	2,320
Net loss			(136,655)		(136,655)
Balance at Sep. 30, 2024	$ 12	3,393,369	(2,514,091)	(765)	878,525
Balance (in shares) at Sep. 30, 2024	124,137
Balance at Jun. 30, 2024	$ 12	3,320,365	(2,482,499)	(1,358)	836,520
Balance (in shares) at Jun. 30, 2024	123,365
Issuance of common stock upon exercise of stock options		1,720			1,720
Issuance of common stock upon exercise of stock options (in shares)	247
Vesting of restricted stock units (in shares)	525
Stock based compensation		71,284			71,284
Unrealized (loss) gain on available-for sale securities				593	593
Net loss			(31,592)		(31,592)
Balance at Sep. 30, 2024	$ 12	3,393,369	(2,514,091)	(765)	878,525
Balance (in shares) at Sep. 30, 2024	124,137
Balance at Dec. 31, 2024	$ 12	3,763,614	(2,567,862)	(344)	$ 1,195,420
Balance (in shares) at Dec. 31, 2024	132,646				132,646
Issuance of common stock upon exercise of stock options		2,819			$ 2,819
Issuance of common stock upon exercise of stock options (in shares)	134
Issuance of common stock under the employee stock purchase plan		12,236			12,236
Issuance of common stock under the employee stock purchase plan (in shares)	116
Issuance of common stock for bonus		32,875			32,875
Issuance of common stock for bonus (in shares)	228
Vesting of restricted stock units	$ 2				2
Vesting of restricted stock units (in shares)	4,409
Stock based compensation		264,097			264,097
Unrealized (loss) gain on available-for sale securities				157	157
Net loss			(255,418)		(255,418)
Balance at Sep. 30, 2025	$ 14	4,075,641	(2,823,280)	(187)	$ 1,252,188
Balance (in shares) at Sep. 30, 2025	137,533				137,533
Balance at Jun. 30, 2025	$ 14	3,982,191	(2,735,736)	(287)	$ 1,246,182
Balance (in shares) at Jun. 30, 2025	136,757
Issuance of common stock upon exercise of stock options		1,935			1,935
Issuance of common stock upon exercise of stock options (in shares)	65
Vesting of restricted stock units (in shares)	711
Stock based compensation		91,515			91,515
Unrealized (loss) gain on available-for sale securities				100	100
Net loss			(87,544)		(87,544)
Balance at Sep. 30, 2025	$ 14	$ 4,075,641	$ (2,823,280)	$ (187)	$ 1,252,188
Balance (in shares) at Sep. 30, 2025	137,533				137,533