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CONSOLIDATED STATEMENTS OF CASH FLOWS
$ in Thousands
 12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Cash flows from operating activities:    
Net loss $ (21,668) $ (24,579)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 84 161
Stock-based compensation 1,242 2,935
Commitment shares issued to Lincoln Park Capital, LLC 249 0
Loss on shares sold to Lincoln Park Capital, LLC 11 0
Amortization of right-of-use asset 1,039 336
Impairment of right-of-use asset 0 772
Non-cash component of acquisition of Exacis in-process research and development 433 0
Gain on remeasurement of operating lease liability and right-of-use-asset 0 (642)
Impairment of in-process research and development 0 5,990
Loss on disposal of fixed assets 1 280
Gain on lease termination 0 (85)
Accrued interest expense 176 0
Paid-in-kind interest expense 113 0
Amortization of debt discount and debt issuance costs 303 0
Change in fair value of warrant liabilities (215) (10,795)
Change in fair value of contingent consideration liability (118) 0
Loss on non-controlling investment 59 941
Changes in operating assets and liabilities:    
Other receivables 527 (262)
Prepaid expenses and other current assets (556) (187)
Other non-current assets 1,014 (646)
Accounts payable and accrued expenses (2,898) 2,034
Operating lease liability 1,338 (340)
Due to related party (1,750) 2,956
Deferred revenue 582 0
Other liabilities (374) 155
Net cash used in operating activities (20,408) (20,976)
Cash flows from investing activities:    
Purchase of property and equipment (19) (297)
Proceeds from the sale of fixed assets 0 250
Net cash used in investing activities (19) (47)
Cash flows from financing activities:    
Proceeds received from the convertible notes financings 16,503 0
Fees paid related to the Convertible Notes Financings (251) 0
Proceeds received under promissory note 1,500 0
Principal payment made on promissory note (1,500) 0
Proceeds from sale of common stock pursuant to stock purchase agreement with Lincoln Park Capital Fund, LLC 320 0
Proceeds from issuance of common stock and warrants in connection with private offering 0 19,706
Fees paid in connection with private offering 0 (110)
Issuance of common stock from exercise of pre-funded warrants 0 7
Payroll tax remitted on net share settlement of equity awards 0 (5)
Dividends paid to Series A convertible preferred stockholders (16) (16)
Cash paid for fractional shares in connection with reverse stock split 0 (1)
Principal payments on finance leases 0 (2)
Net cash provided by financing activities 16,556 19,579
Net decrease in cash and cash equivalents (3,871) (1,444)
Cash, cash equivalents and restricted cash at beginning of period 15,541 16,985
Cash, cash equivalents and restricted cash at end of period 11,670 15,541
Cash paid during the period for:    
Interest 20 30
Income taxes 4 15
Supplemental disclosure of non-cash investing and financing activities:    
Contingent consideration for Exacis asset acquisition 225 0
Issuance of common stock for Exacis asset acquisition 208 0
Note warrants issued 9,219 0
Repricing of warrants in connection with December 2023 financing 766 0
Unpaid fees incurred in connection with the December 2023 financing 116 0
Paid-in-kind interest added to convertible notes principal 113 0
Initial measurement of ROU assets 34,410 1,706
Initial measurement of lease liabilities 34,170 1,706
Adjustment to lease liability and ROU asset due to remeasurement (1,620) 0
Accrual for purchases of property and equipment 323 0
Conversion of Warrant Liability to Equity 0 867
Unpaid fees incurred in connection with November 2022 private offering 0 208
Initial measurement of finance lease liabilities 0 10
Reconciliation of cash, cash equivalents and restricted cash at end of period:    
Cash and cash equivalents 7,575 11,446
Restricted cash 4,095 4,095
Total cash, cash equivalents and restricted cash at end of period $ 11,670 $ 15,541