CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating activities
Net loss	$ (28,039)	$ (23,347)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	176	182
Stock-based compensation expense	1,857	1,691
Amortization of premiums and discounts on marketable securities	(685)	(2,116)
Reduction in the carrying value of right-of-use assets	152	134
Non-cash interest expense and amortization of debt issuance costs	325	263
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(1,272)	(510)
Accounts payable	1,140	1,000
Accrued expenses	(3,211)	(3,304)
Operating lease liabilities	(244)	(220)
Prepaid expenses, net of current portion	652	1,694
Net cash used in operating activities	(29,149)	(24,533)
Investing activities
Purchases of marketable securities	(17,934)	(49,324)
Sales and maturities of marketable securities	51,618	59,750
Purchases of property and equipment	0	(32)
Net cash provided by (used in) investing activities	33,684	10,394
Financing activities
Proceeds from Issuance of Common Stock	228	0
Proceeds from exercise of stock options	0	11
Proceeds from issuance of common stock for cash under Employee Stock Purchase Plan	0	148
Net cash provided by financing activities	228	159
Net increase (decrease) in cash, cash equivalents, and restricted cash	4,763	(13,980)
Effect of foreign currency exchange rate in cash	2	10
Cash, cash equivalents and restricted cash at beginning of period	21,392	34,899
Cash, cash equivalents and restricted cash at end of period	26,157	20,929
Supplemental cash flow information:
Cash and cash equivalents	25,846	20,618
Restricted cash	311	311
Cash, cash equivalents and restricted cash at end of period	$ 26,157	$ 20,929