Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash Flows from Operating Activities:
Net Income (Loss)	$ (75,802)	$ (104,199)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	19,513	16,292
Depreciation and amortization	222	199
Non-cash lease expense	(67)	285
Change in fair value of warrant liability	(497)	(10,187)
Amortization of premium and discounts on marketable securities	(12,057)	3,671
Realized loss on marketable securities	139	1,228
Net loss on disposal of property and equipment	10	50
Change in operating assets and liabilities (net of assets and liabilities acquired in the Merger)
Prepaid expenses and other current assets	2,300	(177)
Interest receivable on marketable securities	(1,217)	554
Lease security deposit	(3)	283
Other non-current assets	(587)	0
Accounts payable	70	(1,786)
Accrued expenses	(23)	(2,321)
Net cash used in operating activities	(67,999)	(96,108)
Cash Flows from Investing Activities:
Purchases of marketable securities	(703,373)	(520,307)
Proceeds from sale of marketable securities	712,349	584,121
Purchases of property and equipment	(69)	(370)
Proceeds from sale of property and equipment	14	13
Net cash provided by investing activities	8,921	63,457
Cash Flows from Financing Activities:
Proceeds from issuance of common stock under ESPP	253	388
Proceeds from exercises of options	375	939
Net cash provided by financing activities	628	1,327
Net decrease in cash and cash equivalents	(58,450)	(31,324)
Cash and cash equivalents, beginning of the period	101,099	132,423
Cash and cash equivalents, end of the period	42,649	101,099
Non-cash operating activity:
Right-of-use asset recognized	$ 1,216	$ 2,171