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Fair Value of Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2023
Fair Value of Financial Instruments [Abstract] |
Schedule of assets and liabilities measured at fair value on a recurring basis |
|  | March 31, 2023 |
|  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds (1) |  | $ | 81 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Corporate notes and commercial paper |  | $ | 587 |  |  | $ | — |  |  | $ | 587 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant |  | $ | 1,421 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,421 |
|  | December 31, 2022 |
|  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds (1) |  | $ | 73 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Corporate notes and commercial paper |  | $ | 1,078 |  |  | $ | — |  |  | $ | 1,078 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant |  | $ | 2,079 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,079 |
Schedule of determination of fair value for its financial assets |
|  | March 31, 2023 |
|  |  |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Cash and cash equivalents |  | $ | 805 |  |  | $ | — |  |  | $ | — |  |  | $ | 805 |
Short-term investments |  |  | 573 |  |  |  | 14 |  |  |  | — |  |  |  | 587 |
|  | $ | 1,378 |  |  | $ | 14 |  |  | $ | — |  |  | $ | 1,392 |
|  | December 31, 2022 |
|  |  |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Cash and cash equivalents |  | $ | 1,828 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,828 |
Short-term investments |  |  | 1,103 |  |  |  | — |  |  |  | (25 | ) |  |  | 1,078 |
|  | $ | 2,931 |  |  | $ | — |  |  | $ | (25 | ) |  | $ | 2,906 |
Schedule of liability-classified warrant outstanding |
|  | Number of warrants on |  |  |  |
|  | common shares |  |  | Amount |
Balance as of December 31, 2021 |  |  | — |  |  | $ | — |
Recognition of warrant liability |  |  | 3,675 |  |  |  | 3,674 |
Change in fair value of warrant |  |  | — |  |  |  | (1,595 | )
Balance as of December 31, 2022 |  |  | 3,675 |  |  |  | 2,079 |
Change in fair value of warrant |  |  | — |  |  |  | (658 | )
Balance as of March 31, 2023 |  |  | 3,675 |  |  | $ | 1,421 |

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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/2003/role/disclosureRef -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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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 + Details
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