Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net loss	$ (157,771)	$ (48,511)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	10,375	5,604
Non-cash research and development arrangements	520	520
Stock-based compensation	69,743	31,456
(Gain) loss on change in fair value of warrant liabilities	19,206	(30,136)
Amortization of premiums and accretion of discounts on available-for-sale securities	(9,746)	(1,577)
Other, net	1,474	441
Changes in operating assets and liabilities:
Accounts receivable	(8,175)	(1,510)
Prepaid expenses and other current assets	(14,413)	(7,012)
Accounts payable	2,188	1,060
Accrued expenses	3,319	1,344
Unearned revenue	2,604	3,892
Other assets and liabilities	1,865	(269)
Net cash provided by (used in) operating activities	(78,811)	(44,698)
Cash flows from investing activities:
Purchases of property and equipment	(13,703)	(9,336)
Capitalized software development costs	(4,558)	(2,179)
Intangible asset acquisition costs	(1,288)	(1,049)
Purchases of available-for-sale securities	(298,445)	(605,689)
Maturities and sales of available-for-sale securities	386,760	310,045
Business acquired	0	(848)
Net cash provided by (used in) investing activities	68,766	(309,056)
Cash flows from financing activities:
Proceeds from stock options exercised	1,954	1,059
Other financing, net	(193)	37
Net cash provided by (used in) financing activities	1,761	1,096
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	(2)	0
Net change in cash, cash equivalents and restricted cash	(8,286)	(352,658)
Cash, cash equivalents and restricted cash at the beginning of the period	46,367	399,025
Cash, cash equivalents and restricted cash at the end of the period	38,081	46,367
Supplemental disclosures of non-cash investing and financing transactions
Property and equipment purchases in accounts payable and accrued expenses	773	485
Intangible asset purchases in accounts payable and accrued expenses	254	164
Operating lease right-of-use assets subject to lease liability	2,380	0
Remeasurement of operating lease right-of-use assets due to lease modification	(849)	0
Noncash reclassification of warrant liabilities to equity upon exercise	20	8
Bonus settled in restricted stock units	3,923	473
Net share settled stock option exercises	$ 291	$ 0