Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating activities
Net loss	$ (12,433)	$ (12,452)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	421	436
Stock-based compensation expense	861	856
Non-cash lease expense	475	403
Non-cash interest expense	111	27
Change in operating assets and liabilities:
Prepaid expenses and other current assets	(7)	(1,198)
Accounts payable	175	985
Accrued expenses and other liabilities	(2,786)	448
Deferred revenue	(385)	0
Operating lease assets and liabilities	(718)	(648)
Net cash used in operating activities	(14,286)	(11,143)
Investing activities
Purchases of property and equipment	(279)	(15)
Net cash used in investing activities	(279)	(15)
Financing activities
Proceeds from issuance of common stock	0	2
Principal payments on financing obligation	(115)	(115)
Principal payments on finance leases	(36)	(89)
Net cash used in financing activities	(151)	(202)
Net decrease in cash, cash equivalents and restricted cash	(14,716)	(11,360)
Cash, cash equivalents and restricted cash – beginning of year	65,663	40,004
Cash, cash equivalents and restricted cash – end of period	50,947	28,644
Supplemental disclosures of cash flow information:
Finance lease right-of-use asset converted to fixed asset	70	0
Purchase of property and equipment in accounts payable and accrued expenses	$ 0	$ 151