Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net loss	$ (60,477,000)	$ (86,879,000)
Adjustment to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	3,354,000	2,837,000
Loss on disposal of property and equipment	0	159,000
Stock-based compensation expense	3,649,000	2,316,000
Reduction in the operating right of use assets	4,963,000	5,428,000
Amortization of debt discount	0	1,283,000
Change in fair value of derivative liability	0	84,000
Accretion on marketable securities	0	(709,000)
Write-off of property and equipment	362,000	0
Realized gain on marketable securities	0	(399,000)
Non-cash interest expense	217,000	139,000
Loss on sale of equipment	49,000	0
Gain on sale of sale-leaseback	(82,000)	0
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(3,120,000)	1,046,000
Accounts payable	(1,852,000)	2,191,000
Accrued expenses	(213,000)	(2,899,000)
Deferred revenue	(1,434,000)	(1,046,000)
Operating lease liabilities	(5,525,000)	(4,941,000)
Other long term liabilities	192,000	213,000
Net cash used in operating activities	(59,917,000)	(81,177,000)
Cash flows from investing activities:
Purchase of marketable securities	0	(34,460,000)
Proceeds from the sale of marketable securities	0	108,000,000
Purchases of property and equipment	(123,000)	(1,132,000)
Net cash (used in) provided by investing activities	(123,000)	72,408,000
Cash flows from financing activities:
Cash, cash equivalents and restricted cash acquired in connection with the reverse recapitalization	0	37,903,000
Payment of reverse recapitalization finance costs	0	(5,814,000)
Proceeds from the issuance of common stock in pre-closing financing	0	30,640,000
Payment of principal related to finance lease liabilities	(1,429,000)	(1,301,000)
Proceeds from failed sale-leaseback arrangement	686,000	1,183,000
Payment of finance liability from failed sale-leaseback arrangements	(1,309,000)	(1,069,000)
Payment of deferred financing costs	0	(146,000)
Proceeds from the exercise of stock options	4,000	187,000
Sale of common stock under Open Market Sales Agreement, net of issuance costs	2,392,000	597,000
Net cash provided by financing activities	344,000	62,180,000
Net (decrease) increase in cash and cash equivalents	(59,696,000)	53,411,000
Cash and cash equivalents at beginning of the year	77,605,000	24,194,000
Cash and cash equivalents at end of the year	17,909,000	77,605,000
Supplemental disclosures of cash flow information:
Cash paid for interest	192,000	352,000
Supplemental disclosure of non-cash financing and investing activities:
Conversion of convertible preferred stock and non-controlling interests upon Merger	0	122,204,000
Conversion of convertible promissory note, accrued interest and derivative liability upon Merger	0	42,447,000
Unrealized gain on marketable securities	0	41,000
Reclassification of deferred financing costs to additional paid-in-capital	9,000	0
Right-of-use assets obtained in exchange for new financing lease liabilities	1,660,000	0
Right-of-use assets obtained in exchange for new operating lease liabilities	6,411,000	2,779,000
Modification of operating lease right-of-use asset and operating lease liabilities	(1,581,000)	0
Disposal of property and equipment in exchange for reduction in financing lease liability	$ 396,000	$ 0