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STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Cash Flows from Operating Activities: |  |
Net loss | $ (51,602) | $ (77,525)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Issuance of common shares - Equity fee on at-the-market offering to Fortress Biotech | 0 | 166
Common shares issuable - Equity fee on at-the-market offering to Fortress Biotech | 4 | 0
Common shares issuable - Equity fee on Registered Direct Offering to Fortress Biotech | 110 | 0
Common shares issuable - Annual Stock Dividend to Fortress Biotech | 477 | 1,109
Issuance of common shares - Equity fee on note payable to Fortress Biotech | 0 | 750
Research and development - licenses acquired | 50 | 365
Stock-based compensation expenses | 568 | 2,283
Depreciation expense | 1,860 | 2,723
Amortization of debt discount | 118 | 470
Amortization of operating lease right-of-use assets | 365 | 308
Loss on disposal of property and equipment | 0 | 255
Gain on sale of property and equipment | (1,466) | 0
Loss on extinguishment of debt | 2,796 | 0
Gain on lease modification | 220 | 0
Changes in operating assets and liabilities: |  |
Prepaid expenses and other assets | 1,092 | (1,006)
Accounts payable and accrued expenses | 125 | 5,257
Payable and accrued expenses - related party | 67 | 43
Lease liabilities | (680) | (263)
Net cash used in operating activities | (49,477) | (65,066)
Cash Flows from Investing Activities: |  |
Purchase of research and development licenses | (50) | (365)
Proceeds from the sale of property and equipment | 6,000 | 127
Purchase of fixed assets | (64) | (2,714)
Net cash from investing activities | 5,886 | (2,952)
Cash Flows from Financing Activities: |  |
Payment of debt | (30,375) | 0
Proceeds from issuance of common shares - At-the-Market Offering | 163 | 6,623
Offering costs for the issuance of common shares - At-the-Market Offering | (3) | (123)
Fees paid on the issuance of debt | 0 | 2,650
Proceeds from issuance of common shares under ESPP | 178 | 206
Net cash provided by financing activities | (26,081) | 34,056
Net change in cash, cash equivalents and restricted cash | (69,672) | (33,962)
Cash, cash equivalents and restricted cash, beginning of the period | 76,656 | 110,618
Cash, cash equivalents and restricted cash, end of the period | 6,984 | 76,656
Supplemental disclosure of cash flow information: |  |
Cash paid for interest | 1,352 | 2,710
Supplemental disclosure of noncash activities: |  |
Issuance of common shares - Founders Agreement and Equity fee to Fortress | 1,109 | 4,212
Note payable final payment fee (incurred but not paid) | 0 | 1,050
Issuance of warrants - note payable | 0 | 384
Lease liabilities arising from obtaining right-of-use assets | 0 | 2,176
Related Party |  |
Changes in operating assets and liabilities: |  |
Other receivables | 36 | 14
Non related party |  |
Changes in operating assets and liabilities: |  |
Other receivables | $ (3,616) | $ (15)

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