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Fair Value Measures (Tables) | 3 Months Ended
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Mar. 31, 2024
Fair Value Measures [Abstract] |
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis | At March 31, 2024 and December 31, 2023, the Company’s assets and liabilities measured at fair value on a recurring basis were as follows:
|  | March 31, 2024 |  |  | December 31, 2023 |
|  | Fair Value Measurements Using Input Types |  |  | Fair Value Measurements Using Input Types |
(In thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  |  | 4 |  |  |  | — |  |  |  | — |  |  |  | 4 |  |  |  | 4 |  |  |  | — |  |  |  | — |  |  |  | 4 |
Total assets |  | $ | 4 |  |  | $ | — |  |  | $ | — |  |  | $ | 4 |  |  | $ | 4 |  |  | $ | — |  |  | $ | — |  |  | $ | 4 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant liabilities - January 2022 warrants |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1 |  |  | $ | 1 |
Warrant liabilities - March 2022 warrants |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | 1 |  |  |  | — |  |  |  | — |  |  |  | 7 |  |  |  | 7 |
Warrant liabilities - August 2022 warrants |  |  | — |  |  |  | — |  |  |  | 3 |  |  |  | 3 |  |  |  | — |  |  |  | — |  |  |  | 18 |  |  |  | 18 |
Warrant liabilities - December 2022 warrants |  |  | — |  |  |  | — |  |  |  | 413 |  |  |  | 413 |  |  |  | — |  |  |  | — |  |  |  | 1,264 |  |  |  | 1,264 |
Total liabilities |  | $ | — |  |  | $ | — |  |  | $ | 417 |  |  | $ | 417 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,290 |  |  | $ | 1,290 |
Schedule of Composition Marketable Securities | The composition of the Company’s marketable securities are as follows:
(In thousands) |  | March 31, 2024 |  |  | December 31, 2023 |
Current marketable securities: |  |  |  |  |  |
Money market funds |  | $ | 4 |  |  | $ | 4 |
Schedule of Company’s Assumptions Used in the Valuations | The following table summarizes the Company’s assumptions used in the valuations as of March 31, 2024 and December 31, 2023:
|  | January 2022 Warrants |  |  | March 2022 Warrants |  |  | August 2022 Warrants |  |  | December 2022 Warrants |  |  | January 2022 Warrants |  |  | March 2022 Warrants |  |  | August 2022 Warrants |  |  | December 2022 Warrants |
|  | March 31, 2024 |  |  | December 31, 2023 |
Stock price |  | $ | 0.37 |  |  | $ | 0.37 |  |  | $ | 0.37 |  |  | $ | 0.37 |  |  | $ | 1.26 |  |  | $ | 1.26 |  |  | $ | 1.26 |  |  | $ | 1.26 |
Exercise price |  | $ | 1,496 |  |  | $ | 430 |  |  | $ | 246 |  |  | $ | 0.38 |  |  | $ | 1,496 |  |  | $ | 430 |  |  | $ | 246 |  |  | $ | 3.45 |
Expected term (in Years) |  |  | 3.32 |  |  |  | 3.88 |  |  |  | 3.88 |  |  |  | 3.88 |  |  |  | 3.57 |  |  |  | 4.13 |  |  |  | 4.13 |  |  |  | 4.13 |
Volatility |  |  | 136.00 | % |  |  | 138.00 | % |  |  | 138.00 | % |  |  | 138.00 | % |  |  | 138.00 | % |  |  | 136.00 | % |  |  | 136.00 | % |  |  | 136.00 | %
Discount rate - treasury yield |  |  | 4.37 | % |  |  | 4.32 | % |  |  | 4.32 | % |  |  | 4.32 | % |  |  | 3.96 | % |  |  | 3.91 | % |  |  | 3.91 | % |  |  | 3.91 | %
Schedule of Changes in the Fair Value of the Level 3 Warrant Liabilities | The following table sets forth a summary of the changes in the fair value of the Level 3 warrant liabilities for the three months ended March 31, 2024 and for the year ended December 31, 2023:
(In thousands) |  | March 31, 2024 |  |  | For the year ended December 31, 2023 |
Warrant liabilities – beginning of period |  | $ | 1,290 |  |  | $ | 5,985 |
Change in estimated fair value |  |  | (873 | ) |  |  | (4,695 | )
Warrant liabilities –end of period |  | $ | 417 |  |  | $ | 1,290 |

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 103 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-103 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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