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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Cash flows used in operating activities: |  |
Net loss | $ (16,673) | $ (9,075)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 300 | 524
Amortization of deferred financing costs and debt discount |  | 20
Stock-based compensation expense | 827 | 422
Noncash financing expenses | 3,061 | 3,545
Change in fair value of derivative instruments | 2,631 | (5,654)
Accretion of discount on short-term investments | (19) | (70)
Reduction in the carrying amount of operating lease right-of-use assets | 53 | 96
Gain on sale of assets | (16) |
Increases (decreases) in cash caused by changes in operating assets and liabilities: |  |
Other assets | 635 | 704
Accounts payable and accrued expenses | (6,308) | 1,326
Change in operating lease liabilities | (54) | (97)
Deferred grant liability | 1,045 | (1,084)
Net cash used in operating activities | (14,518) | (9,343)
Cash flows used in investing activities: |  |
Purchases of property and equipment | (37) | (135)
Proceeds from sale of property and equipment | 30 |
Purchase of short-term investments | (11,068) | (7,145)
Redemption of short-term investments | 11,305 | 3,650
Purchase of intangible assets | (7) | (545)
Net cash provided by (used in) investing activities | 223 | (4,175)
Cash flows provided by financing activities: |  |
Principal payments of term loan obligation |  | (3,996)
Proceeds from credit facility |  | 3,292
Repayment of credit facility | (3,292) |
Payment of financing costs | (2,250) |
Proceeds from issuance of notes payable and warrants | 3,738 |
Repayment of notes payable | (3,703) |
Purchase of treasury stock |  | (374)
Proceeds from sale of common stock, pre-funded warrants and warrants | 15,927 | 7,265
Proceeds from sale of common stock under Lincoln Park Purchase Agreement | 19,612 |
Payment to investors pursuant to Letter Agreement (Note 13) | (2,293) |
Offering costs for sale of common stock | (231) |
Net cash provided by financing activities | 27,508 | 6,187
Net increase (decrease) in cash and cash equivalents | 13,213 | (7,331)
Cash and cash equivalents at beginning of period | 76 | 8,554
Cash and cash equivalents at end of period | 13,289 | 1,223
Cash paid during period for: |  |
Interest | 539 | $ 32
Supplemental schedule of non-cash investing and financing activities: |  |
Unpaid liability to investors pursuant to Letter Agreement (Note 13) | 6,391 |
Exchange of warrants for notes payable | 3,694 |
Redemption of notes by issuance of common stock, pre-funded warrants and warrants | 3,512 |
Unpaid offering cost | $ 252 |

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