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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

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