Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net loss	$ (28,919)	$ (93,435)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	2,335	6,716
Depreciation expense	459	471
Impairment of property and equipment		1,883	$ 1,600
Write-off of deferred financing costs		140
Impairment of right-of-use assets		22,836
Gain on sale of property and equipment	(8)
Net amortization of discount on short-term investments		(2,276)
Changes in operating assets and liabilities
Prepaid expenses and other current assets	2,069	(380)
Operating lease right-of-use assets	3,132	1,353
Other assets		1,111
Accounts payable	(516)	(1,887)
Accrued expenses and other current liabilities	(1,811)	(5,975)
Restructuring liability	(1,081)	4,347
Operating lease liabilities	(4,121)	(3,381)
Deferred revenue	(398)	(1,534)
Net cash used in operating activities	(28,859)	(70,011)
Cash flows from investing activities:
Purchases of property and equipment	(116)	(2,338)
Proceeds from the sale of property and equipment	18
Purchases of short-term investments		(47,949)
Maturity of short-term investments		130,592
Net cash (used in) provided by investing activities	(98)	80,305
Cash flows from financing activities:
Proceeds from sale of common stock, warrants and pre-funded warrants	4,999	8,818
Payment of deferred offering costs	(726)	(290)
Proceeds from exercise of stock options		3
Net cash provided by financing activities	4,273	8,531
Net (decrease) increase in cash, cash equivalents and restricted cash	(24,684)	18,825
Cash, cash equivalents and restricted cash, beginning of period	42,570	23,745
Cash, cash equivalents and restricted cash, end of period	$ 17,886	42,570	$ 23,745
Supplemental disclosure of non-cash financing and investing activities:
Right of Use Asset in Exchange for Lease Liability		$ 13,667