CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Revenue	$ 396,290	$ 115,794	$ 79,872
Cost of revenue	93,591	35,967	21,191
Gross profit	302,699	79,827	58,681
Operating expenses
Research and development	200,830	73,407	73,711
Sales and marketing	123,652	19,992	24,407
General and administrative	94,283	15,925	20,757
Total operating expenses	418,765	109,324	118,875
Operating loss	(116,066)	(29,497)	(60,194)
Interest income	34,288	6,549	2,613
Loss before income taxes	(81,778)	(22,948)	(57,581)
Income tax provision	1,643	3,309	764
Net loss	$ (83,421)	$ (26,257)	$ (58,345)
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.64)	$ (0.71)	$ (1.71)
Diluted (in dollars per share)	$ (0.64)	$ (0.71)	$ (1.71)
Weighted-average shares used in calculating net loss per share attributable to common stockholders:
Basic (in shares)	131,262	37,131	34,171
Diluted (in shares)	131,262	37,131	34,171
Other comprehensive income (loss)
Unrealized gain (loss) on marketable securities, net of taxes	$ 167	$ 488	$ (229)
Total other comprehensive income (loss)	167	488	(229)
Total comprehensive loss	$ (83,254)	$ (25,769)	$ (58,574)