CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities
Net loss	$ (16,498)	$ (18,019)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	174	76
Amortization (accretion) on marketable securities	(143)	0
Non-cash interest expense	24	19
Non-cash lease expense	131	179
Stock-based compensation expense	2,689	3,299
Other	352	0
Changes in assets and liabilities:
Prepaid expenses and other current assets	(60)	(575)
Accounts payable and accrued expenses	(4,784)	131
Lease obligations	(125)	(176)
Net cash used in operating activities	(18,240)	(15,066)
Cash flows from investing activities
Purchases of marketable securities	(3,947)	0
Proceeds from the maturities of marketable securities	9,000	0
Purchases of property and equipment	(1,612)	(223)
Net cash provided by (used in) investing activities	3,441	(223)
Cash flows from financing activities
Proceeds from issuance of common stock, net	5,731	50,177
Payment of equity issuance costs	(173)	(75)
Payment of debt issuance costs	(62)	0
Net cash provided by financing activities	5,496	50,102
Effect of changes in exchange rate on cash, cash equivalents, and restricted cash	(1)	0
Net (decrease) increase in cash, cash equivalents, and restricted cash	(9,304)	34,813
Cash, cash equivalents, and restricted cash at beginning of period	77,563	95,109
Cash, cash equivalents, and restricted cash at end of period	68,259	129,922
Supplemental disclosure of non-cash investing and financing transactions:
Purchases of property and equipment	1,119	611
Equity issuance costs	$ 0	$ 71