Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenue	$ 852,000	$ 764,000	$ 2,495,000	$ 2,239,000
Cost of revenue	211,000	203,000	617,000	569,000
Gross profit	641,000	561,000	1,878,000	1,670,000
Operating expenses:
Operations and support	64,000	145,000	206,000	273,000
Research and development	149,000	1,850,000	449,000	2,107,000
Sales and marketing	213,000	455,000	600,000	782,000
General and administrative	77,000	568,000	289,000	696,000
Total operating expenses	503,000	3,018,000	1,544,000	3,858,000
Income (loss) from operations	138,000	(2,457,000)	334,000	(2,188,000)
Other expense, net	0	(5,000)	(2,000)	(2,000)
Interest income	15,000	23,000	54,000	57,000
Income (loss) before provision for (benefit from) income taxes	153,000	(2,439,000)	386,000	(2,133,000)
Provision for (benefit from) income taxes	35,000	(440,000)	77,000	(376,000)
Net income (loss)	118,000	(1,999,000)	309,000	(1,757,000)
Accretion related to Series A redeemable convertible preferred stock	(2,000)	0	(7,000)	0
Net income (loss) attributable to common stockholders, basic	116,000	(1,999,000)	302,000	(1,757,000)
Accretion related to Series A redeemable convertible preferred stock	2,000	0	0	0
Net income (loss) attributable to common stockholders, diluted	$ 118,000	$ (1,999,000)	$ 302,000	$ (1,757,000)
Net income (loss) per share attributable to common stockholders, basic (in dollars per share)	$ 0.45	$ (20.86)	$ 1.13	$ (21.92)
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)	$ 0.42	$ (20.86)	$ 1.06	$ (21.92)
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, basic (in shares)	259,660	95,836	266,550	80,180
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, diluted (in shares)	281,003	95,836	285,701	80,180