Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating activities:
Net loss	$ (36,071)	$ (33,442)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	3,799	4,907
Depreciation expense	832	918
Non-cash interest expense	1,010	410
Non-cash lease expense	381	541
Loss on extinguishment of debt	0	553
Change in fair value of derivative liability	(190)	(1,609)
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(574)	(145)
Other receivables	0	805
Accounts payable, accrued expenses and other liabilities	(2,348)	15
Deferred revenue	0	(1,340)
Operating lease liability	(951)	(1,087)
Net cash used in operating activities	(34,112)	(29,474)
Investing activities:
Purchases of property and equipment	0	(128)
Net cash used in investing activities	0	(128)
Financing activities:
Proceeds from at the market offering of common stock, net of issuance costs	347	21,124
Proceeds from drawdown of term loans	0	30,000
Payment of debt issuance costs	0	(673)
Repayment of term loan	0	(40,000)
Proceeds from issuances under Employee Stock Purchase Plan	41	76
Proceeds from stock option exercises	0	12
Net cash provided by financing activities	388	10,539
Net decrease in cash, cash equivalents and restricted cash and cash equivalents	(33,724)	(19,063)
Cash, cash equivalents and restricted cash and cash equivalents—beginning of period	112,215	155,577
Cash, cash equivalents and restricted cash and cash equivalents—end of period	78,491	136,514
Reconciliation of cash, cash equivalents and restricted cash and cash equivalents to the condensed consolidated balance sheets
Cash and cash equivalents	77,596	135,303
Restricted cash and cash equivalents	895	1,211
Total cash, cash equivalents and restricted cash and cash equivalents	78,491	136,514
Supplemental disclosure of cash flow information:
Cash paid for interest	1,562	1,788
Supplemental disclosure of non-cash investing and financing activities:
Issuance costs in accounts payable and accrued expenses	126	69
Fair value of derivative liability issued with term loan	$ 0	$ 4,450