Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating activities
Net loss	$ (34,049)	$ (37,805)
Reconciliation of net loss to net cash used in operating activities:
Stock-based compensation	3,103	3,051
Non-cash interest expense	373	517
Amortization of premium and interest on marketable securities	(1,064)	(379)
Depreciation expense	19	29
Loss on extinguishment of debt	942	0
Changes in operating assets and liabilities:
Prepaid expenses and other assets	2,731	(1,328)
Accounts payable	2,125	(2,721)
Accrued expenses	(342)	(5,363)
Net cash used in operating activities	(26,162)	(43,999)
Investing activities
Purchase of marketable securities	(60,533)	(39,717)
Proceeds from sales and maturities of marketable securities	40,700	44,700
Net cash (used in) provided by investing activities	(19,833)	4,983
Financing activities
Proceeds from issuance of common stock upon at-the-market offering, net of issuance costs	44,207	0
Proceeds from issuance of common stock, purchase warrants and pre-funded warrants for the purchase of common stock, net of underwriting discounts, commissions, and offering costs	0	46,503
Proceeds from issuance of common stock upon stock option exercises	499	1,496
Proceeds from issuance of common stock upon exercise of common warrants	450	0
Common stock repurchase	(44)	(22)
Payment of debt extinguishment costs	(170)	0
Net cash provided by financing activities	44,942	47,977
(Decrease) increase in cash and cash equivalents	(1,053)	8,961
Cash and cash equivalents, beginning of period	49,255	45,917
Cash and cash equivalents, end of period	48,202	54,878
Supplemental disclosure of cash flow information
Cash paid for interest	2,681	2,277
Cash paid for taxes	$ 47	$ 26