Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities:
Net loss	$ (10,235)	$ (11,694)
Adjustments to reconcile net loss to cash used in operating activities:
Unrealized (gain) loss on equity investment	66	(4,397)
Change in accrued interest and accretion of discount on marketable securities	(197)	(921)
Stock-based compensation expense	1,284	1,968
Depreciation and amortization expense	141	136
Non-cash operating lease expense	288	266
Change in lease liability	(325)	(303)
Change in operating assets and liabilities:
Prepaid expenses and other current assets	(60)	853
Accounts payable	(1,242)	(107)
Accrued expenses	(1)	(2,486)
Net cash used in operating activities	(10,280)	(16,686)
Cash flows from investing activities:
Purchase of marketable securities	(4,898)	(9,793)
Sales/maturities of marketable securities	10,000	30,000
Purchases of property and equipment	0	(19)
Net cash provided by investing activities	5,102	20,188
Cash flows from financing activities:
Proceeds from exercise of options and purchases from employee stock purchase plan	13	228
Net cash provided by financing activities	13	228
Net (decrease) increase in cash, cash equivalents and restricted cash	(5,165)	3,731
Cash, cash equivalents and restricted cash, at beginning of period	28,232	28,972
Cash, cash equivalents and restricted cash, at end of period	$ 23,067	$ 32,703