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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Cash flows used in operating activities: |  |
Net loss | $ (12,978) | $ (13,316)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 723 | 628
Amortization of deferred financing costs and debt discount | 20 | 190
Common stock issued for research and development |  | 75
Accretion of discount on short-term investments | (111) |
Non-cash financing expenses | 3,545 |
Change in fair value of warrants | (5,654) |
Loss on disposal of property and equipment |  | 2
Share-based compensation expense | 550 | 569
Reduction in the carrying amount of operating lease right-of-use assets | 129 | 117
Increases (decreases) in cash caused by changes in operating assets and liabilities: |  |
Grant receivable | (571) |
Other assets | 218 | 2,397
Accounts payable and accrued expenses | 4,702 | (3,677)
Change in operating lease liabilities | (130) | (117)
Deferred grant liability | (997) | 281
Net cash used in operating activities | (10,554) | (12,851)
Cash flows used in investing activities: |  |
Purchases of property and equipment | (146) | (160)
Purchases of intangible assets | (545) |
Purchases of short-term investments | (15,590) |
Redemption of short-term investments | 12,170 |
Net cash used in investing activities | (4,111) | (160)
Cash flows from financing activities: |  |
Principal payments of long-term obligations | (3,996) | (1,608)
Proceeds from credit facility | 3,292 |
Proceeds from sale of common stock warrants and pre-funded warrants, net | 7,265 |
Proceeds from sale of common stock, net of offering costs of $0.2 million |  | 5,527
Payment of offering costs related to sale of common stock |  | (348)
Purchase of treasury stock | (374) | (126)
Net cash provided by financing activities | 6,187 | 3,445
Net decrease in cash and cash equivalents | (8,478) | (9,566)
Cash and cash equivalents at beginning of period | 8,554 | 18,120
Cash and cash equivalents at end of period | 76 | 8,554
Cash paid during period for: |  |
Interest | $ 32 | 222
Supplemental schedule of non-cash investing and financing activities: |  |
Unpaid offering cost |  | 174
Common stock issued in payment for in process research and development |  | 75
Right-of-use assets acquired by assuming operating lease liabilities |  | $ 71

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