Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities
Net loss	$ (43,311)	$ (78,710)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	675	360
Accretion of debt discount and non-cash interest expense	533	1,242
Stock-based compensation expense	2,450	6,397
Non-cash lease expense	434	465
Changes in operating assets and liabilities:
Accounts receivable	183	0
Other receivables	0	610
Receivables from related parties	23	0
Prepaid expenses and other current assets	730	(2,361)
Other non-current assets	28	(1,422)
Accounts payable	(353)	4,050
Accrued expenses	2,884	8,034
Operating lease liability	(171)	(495)
Net cash used in operating activities	(35,895)	(63,050)
Cash flows from investing activities
Purchase of fixed assets	(21)	(1,119)
Net cash used in investing activities	(21)	(1,119)
Cash flows from financing activities
Proceeds from the issuance of debt	99,965	0
Payment of fees associated with debt	(125)	0
Proceeds from the exercise of stock options	0	38,728
Net cash provided by financing activities	99,840	38,728
Net increase (decrease) in cash and cash equivalents	63,924	(25,441)
Cash and cash equivalents at beginning of period	152,596	277,924
Cash and cash equivalents at end of period	216,520	252,483
Supplemental Cash Flow Information [Abstract]
Cash paid for interest	1,299	6,892
Cash paid for income taxes	0	0
Supplemental schedule of non-cash investing and financing activities
Fair value of warrants issued to lender in conjunction with 2025 Loan (as defined in Note 3)	1,720	0
Payable for purchase of fixed assets	0	307
Receivable for proceeds from the exercise of stock options	$ 0	$ 1,650