Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net loss	$ (10,787)	$ (7,837)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	154	194
Stock-based compensation	2,003	1,267
Amortization of premium and discount on marketable securities	(376)	(593)
ROU asset amortization	309	287
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(936)	(250)
Accounts payable	(3,236)	(2,257)
Accrued expenses	(699)	(2,747)
Operating lease liability	(320)	(293)
Net cash used in operating activities	(13,888)	(12,229)
Cash flows from investing activities:
Purchases of marketable securities	(41,878)	(54,919)
Proceeds from sale or maturities of marketable securities	37,779	59,188
Net cash (used in) provided by investing activities	(4,099)	4,269
Cash flows from financing activities:
Proceeds from issuance of common stock	(18,113)	0
Issuance costs from issuance of common stock	(544)	0
Taxes paid related to net shares settlement of RSUs	(136)	0
Proceeds from exercise of stock options	0	41
Net cash provided by financing activities	17,433	41
Net change in cash and cash equivalents	(554)	(7,919)
Cash and cash equivalents at beginning of period	24,228	34,946
Cash and cash equivalents at end of period	23,674	27,027
Supplemental disclosure of cash flow information
Unrealized (loss) gain on marketable securities	$ (127)	$ 156