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CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Cash flows used in operating activities: |  |  |  |  |  |  |
Net loss | $ (3,219) | $ (4,805) | $ (5,219) | $ (4,116) | $ (9,506) | $ (14,617) |
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  | 477 | 460 |
Amortization of deferred financing costs and debt discount |  |  |  |  | 160 | 309 |
Stock issued for research and development |  |  |  |  | 75 |  |
Loss on disposal of property and equipment |  |  |  |  | 2 |  |
Stock-based compensation expense |  |  |  |  | 428 | 476 |
Change in fair value of derivative instruments |  |  |  |  |  | (1) |
Amortization of operating lease right-of-use assets |  |  |  |  | 86 | 66 |
Increases (decreases) in cash caused by changes in operating assets and liabilities: |  |  |  |  |  |  |
Grant Receivable |  |  |  |  | (91) | 73 |
Other assets |  |  |  |  | 3,190 | 642 |
Accounts payable and accrued expenses |  |  |  |  | (4,061) | 1,955 |
Change in operating lease liabilities |  |  |  |  | (87) | (101) |
Deferred grant liability |  |  |  |  | (1,643) |  |
Net cash used in operating activities |  |  |  |  | (10,970) | (10,738) |
Cash flows used in investing activities: |  |  |  |  |  |  |
Purchases of property and equipment |  |  |  |  | (118) | (381) |
Purchase of intangible assets |  |  |  |  |  | (117) |
In process research and development acquired |  |  |  |  |  | (250) |
Net cash used in investing activities |  |  |  |  | (118) | (748) |
Cash flows from financing activities: |  |  |  |  |  |  |
Principal payments of term loan obligation |  |  |  |  | (1,206) | (1,206) |
Proceeds from sale of common stock, net of offering cost of $0.2 million and $0.7 million, respectively |  |  |  |  | 5,180 | 14,558 |
Net cash provided by financing activities |  |  |  |  | 3,974 | 13,352 |
Net increase (decrease) in cash and cash equivalents |  |  |  |  | (7,114) | 1,866 |
Cash and cash equivalents at beginning of period |  | $ 18,120 |  | $ 18,400 | 18,120 | 18,400 | $ 18,400
Cash and cash equivalents at end of period | $ 11,006 |  | $ 20,266 |  | 11,006 | 20,266 | $ 18,120
Cash paid during period for: |  |  |  |  |  |  |
Interest |  |  |  |  | 186 | 248 |
Supplemental schedule of non-cash investing and financing activities: |  |  |  |  |  |  |
Unpaid offering cost |  |  |  |  | 1 | $ 68 |
Right-of-use assets acquired by assuming operating lease liabilities |  |  |  |  | 71 |  |
Common stock issued in payment for in process research and development |  |  |  |  | $ 75 |  |

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