Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Cash flows used in operating activities:
Net loss	$ (11,294)	$ (8,539)	$ (20,339)	$ (19,294)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation			3,193	3,821
Operating lease right-of-use asset			683	683
Depreciation			155	109
Amortization of premium (Accretion of discount) on marketable debt securities			(204)	756
Changes in operating assets and liabilities:
Prepaid expenses and other current assets			(2,044)	(716)
Other assets			(2,237)	54
Accounts payable			266	(562)
Accrued expenses			(1,106)	(272)
Operating lease liabilities			(663)	(663)
Net cash used in operating activities			(22,296)	(16,084)
Cash flows from investing activities:
Purchase of marketable debt securities			(12,186)	(14,428)
Proceeds from maturity and redemption of marketable debt securities			44,405	28,706
Purchase of property and equipment			(8)	(31)
Net cash provided by investing activities			32,211	14,247
Cash flows from financing activities:
Repurchase of shares in connection with settlement of RSUs			(64)	(72)
Net cash used in financing activities			(64)	(72)
Net increase (decrease) in cash and cash equivalents and restricted cash			9,851	(1,909)
Cash and cash equivalents and restricted cash - beginning of year			24,872	36,469
Cash and cash equivalents and restricted cash - end of period	34,723	34,560	34,723	34,560
Reconciliation of cash and cash equivalents and restricted cash to the condensed consolidated balance sheets:
Cash and cash equivalents	33,978	33,815	33,978	33,815
Restricted cash, non-current	745	745	745	745
Cash and cash equivalents and restricted cash	$ 34,723	$ 34,560	$ 34,723	$ 34,560