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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Cash flows from operating activities:    
Net loss $ (15,515) $ (20,090)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 62 144
Stock-based compensation 1,077 2,538
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 580 267
Impairment of right-of-use-asset 0 772
Non-cash component of acquisition of Exacis in-process research and development 433 0
Impairment of in-process research and development 0 5,990
Loss on disposal of fixed assets 1 431
Gain on lease termination 0 (85)
Amortization of debt discount and debt issuance costs 52 0
Change in fair value of warrant liabilities (166) (10,493)
Change in fair value of contingent consideration liability (118) 0
Loss on non-controlling investment 59 932
Changes in operating assets and liabilities:    
Other receivables (825) (237)
Prepaid expenses and other current assets 340 (575)
Other non-current assets (2,911) (331)
Accounts payable and accrued expenses 1,212 1,376
Operating lease liability 795 (223)
Due to related party (1,313) 3,393
Deferred revenue 599 0
Other liabilities (369) 650
Net cash used in operating activities (15,747) (15,541)
Cash flows from investing activities:    
Purchase of property and equipment 0 (276)
Proceeds from the sale of fixed assets 0 100
Net used in investing activities 0 (176)
Cash flows from financing activities:    
Proceeds received from the July 2023 Financing 8,715 0
Fees paid related to the July 2023 Financing (175) 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 11,993
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 preferred stockholders (8) (8)
Issuance of common stock from vested restricted stock units 0 0
Principal payments on finance leases 0 (1)
Net cash provided by financing activities 8,852 11,986
Net decrease in cash and cash equivalents (6,895) (3,731)
Cash, cash equivalents and restricted cash at beginning of period 15,541 16,985
Cash, cash equivalents and restricted cash at end of period 8,646 13,254
Cash paid during the period for:    
Interest 13 25
Income taxes 4 8
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
Warrants issued in connection with the July 2023 Financing 5,234 0
Unpaid fees incurred in connection with the July 2023 Financing 27 0
Initial measurement of ROU assets 34,410 1,706
Initial measurement of lease liabilities 34,170 1,706
Conversion of warrant liability to equity 0 867
Initial measurement of finance lease liabilities 0 10
Reconciliation of cash, cash equivalents and restricted cash at end of period:    
Cash and cash equivalents 4,551 13,254
Restricted cash 4,095 0
Total Cash, cash equivalents and restricted cash at end of period $ 8,646 $ 13,254