Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating activities
Net Income (Loss)	$ (51,058)	$ (49,197)
Adjustments to reconcile net loss to net cash used in by operating activities:
Share-based compensation expense	7,649	13,548
Depreciation and amortization	492	210
Amortization of premiums and accretion of discounts on short-term investments, net	(2,054)	(626)
Change in operating assets and liabilities:
Prepaid expenses and other current assets	1,431	(985)
Other assets	566	567
Accounts payable	(98)	(361)
Accrued expenses	3,184	1,394
Lease liabilities, net	(4)	(7)
Net cash used in operating activities	(39,892)	(35,457)
Investing activities
Purchases of property and equipment	(138)	(45)
Purchases of short-term investments	(67,136)	(70,620)
Proceeds from maturity of short-term investments	82,272	16,799
Net cash provided by (used in) investing activities	14,998	(53,866)
Financing activities
Proceeds from debt, net of issuance costs	0	19,986
Issuance of common stock, net of issuance costs	299	2,331
Issuance of common stock upon option exercises and from employee stock plan	139	225
Net cash provided by financing activities	438	22,542
Net decrease in cash and cash equivalents	(24,456)	(66,781)
Cash and cash equivalents at beginning of period	36,773	103,554
Cash and cash equivalents at end of period	12,317	36,773
Supplemental disclosure of cash flow information
Interest paid	3,070	454
Interest received	3,344	1,171
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 381	$ 0