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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

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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
Name: | us-gaap_ShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration