Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating activities:
Net loss	$ (69,045)	$ (36,917)
Adjustments required to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	972	892
Stock-based compensation expense	938	3,105
Change in fair value of convertible debt	21,845
Non-cash interest expense	2,573
Non-cash interest income	(22)
Loss on convertible debt extinguishment	3,863
Change in right-of-use asset	1,018
Loss from disposal of property and equipment	81
Changes in operating assets and liabilities:
Prepaid expenses and other assets	4,826	(7,662)
Accounts payable and accrued liabilities	39	3,665
Accrued compensation	(1,060)	793
Operating lease liability	(13,451)	3,643
Net cash used in operating activities	(47,423)	(32,481)
Investing activities:
Purchases of property and equipment	(8,144)	(2,211)
Proceeds from sale of property and equipment	10
Net cash used in investing activities	(8,134)	(2,211)
Financing activities:
Proceeds from issuance of convertible debt, net of issuance costs	29,101
Proceeds from issuance of long-term debt, net of issuance costs	24,925
Payment of deferred offering costs		(500)
Proceeds from sale of common stock, net of offering costs		44,391
Payments for taxes related to net share settlement of equity awards	(43)
Proceeds from exercise of stock options	5	125
Net cash provided by financing activities	53,988	44,016
Net (decrease) increase in cash, cash equivalents and restricted cash	(1,569)	9,324
Cash, cash equivalents and restricted cash, beginning of period	20,812	11,488
Cash, cash equivalents and restricted cash, end of period	19,243	20,812
Supplemental disclosure of cash flow information:
Right-of-use asset obtained in exchange for operating lease liability	2,700	8,669
Property and equipment included in accounts payable	$ 217	$ 78