CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net loss	$ (81,351)	$ (58,365)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	480	229
Amortization (accretion) on marketable securities	(99)	0
Non-cash interest expense	83	78
Non-cash lease expense	593	360
Stock-based compensation expense	10,541	6,958
Income tax benefit	0	(52)
Gain on forgiveness of Paycheck Protection Program note	0	(426)
Impairment on note receivable	0	761
Other	479	26
Changes in assets and liabilities:
Prepaid expenses and other current assets	91	(742)
Accounts payable and accrued expenses	9,487	3,498
Lease obligations	(383)	(366)
Other assets	0	100
Net cash used in operating activities	(60,079)	(47,941)
Cash flows from investing activities
Purchases of marketable securities	(13,271)	0
Purchases of property and equipment	(4,457)	(939)
Asset acquisition	0	(127)
Issuance of note receivable	0	(750)
Repayment of note receivable	761	0
Net cash used in investing activities	(16,967)	(1,816)
Cash flows from financing activities
Proceeds from issuance of common stock, net	59,567	129,211
Payment of equity issuance costs	(549)	(8,525)
Proceeds from issuance of debt	500	0
Payments of debt issuance costs	(43)	0
Financing lease principal payments	0	(10)
Net cash provided by financing activities	59,475	120,676
Effect of changes in exchange rate on cash, cash equivalents, and restricted cash	25	0
Net (decrease) increase in cash, cash equivalents, and restricted cash	(17,546)	70,919
Cash, cash equivalents, and restricted cash at beginning of period	95,109	24,190
Cash, cash equivalents, and restricted cash at end of period	77,563	95,109
Supplemental disclosure of non-cash investing and financing transactions:
Series B Convertible Preferred Stock issuance	0	4,988
Exercise of warrants	0	603
Forgiveness of Paycheck Protection Program note	0	426
Purchase of property and equipment	911	16
Right-of-use assets related to operating leases	2,916	1,226
Debt issuance costs	$ 37	$ 0