Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows used in operating activities:
Net loss	$ (11,095)	$ (9,045)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	1,226	1,575
Operating lease right-of-use asset	246	341
Depreciation	83	77
Amortization of premium (Accretion of discount) on marketable debt securities	(68)	(71)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	435	(6,145)
Other assets	(301)	58
Accounts payable	(1,462)	2,495
Accrued expenses and other current liabilities	797	(1,841)
Operating lease liabilities	(240)	(332)
Net cash used in operating activities	(10,379)	(12,888)
Cash flows from investing activities:
Purchase of marketable debt securities		(12,186)
Proceeds from maturity and redemption of marketable debt securities	23,100	22,052
Purchase of property and equipment		(6)
Net cash provided by investing activities	23,100	9,860
Cash flows from financing activities:
Repurchase of shares in connection with settlement of RSUs	(76)	(64)
Net cash used in financing activities	(76)	(64)
Net increase (decrease) in cash and cash equivalents and restricted cash	12,645	(3,092)
Cash and cash equivalents and restricted cash - beginning of year	40,331	24,872
Cash and cash equivalents and restricted cash - end of period	52,976	21,780
Reconciliation of cash and cash equivalents and restricted cash to the condensed consolidated balance sheets:
Cash and cash equivalents	52,231	21,035
Restricted cash, non-current	745	745
Cash and cash equivalents and restricted cash	52,976	21,780
Supplemental schedule of noncash financing activities:
Accrued financing fees	$ 385