Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Cash flows used in operating activities:
Net loss	$ (9,860)	$ (7,691)	$ (30,199)	$ (26,985)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation			4,640	5,258
Operating lease right-of-use asset			711	1,024
Depreciation			234	173
Amortization of premium (Accretion of discount) on marketable debt securities			(331)	1,029
Changes in operating assets and liabilities:
Prepaid expenses and other current assets			(1,919)	(433)
Other assets			(2,297)	131
Accounts payable			918	(498)
Accrued expenses			68	(135)
Operating lease liabilities			(682)	(995)
Net cash used in operating activities			(28,857)	(21,431)
Cash flows from investing activities:
Purchase of marketable debt securities			(12,186)	(14,428)
Proceeds from maturity and redemption of marketable debt securities			50,820	47,837
Purchase of property and equipment			(45)	(114)
Net cash provided by investing activities			38,589	33,295
Cash flows from financing activities:
Repurchase of shares in connection with settlement of RSUs			(91)	(90)
Net cash used in financing activities			(91)	(90)
Net increase (decrease) in cash and cash equivalents and restricted cash			9,641	11,774
Cash and cash equivalents and restricted cash - beginning of year			24,872	36,469
Cash and cash equivalents and restricted cash - end of period	34,513	48,243	34,513	48,243
Reconciliation of cash and cash equivalents and restricted cash to the condensed consolidated balance sheets:
Cash and cash equivalents	33,768	47,498	33,768	47,498
Restricted cash, non-current	745	745	745	745
Cash and cash equivalents and restricted cash	$ 34,513	$ 48,243	$ 34,513	$ 48,243