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Fair Value of Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2022
Fair Value Disclosures [Abstract] |
Schedule of Estimated Fair Value of Financial Instrument | The estimated fair values of financial instruments outstanding were (in thousands): Schedule of Estimated Fair Value of Financial Instrument
|  | March 31, 2022 (Unaudited) |
|  |  |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Cash and cash equivalents |  | $ | 7,286 |  |  | $ | — |  |  | $ | — |  |  | $ | 7,286 |
Short-term investments |  |  | 19,496 |  |  |  | — |  |  |  | (42 | ) |  |  | 19,454 |
Total |  | $ | 26,782 |  |  | $ | — |  |  | $ | (42 | ) |  | $ | 26,740 |
|  | December 31, 2021 |
|  |  |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Cash and cash equivalents |  | $ | 8,968 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,968 |
Short-term investments |  |  | 23,040 |  |  |  | — |  |  |  | (29 | ) |  |  | 23,011 |
Total |  | $ | 32,008 |  |  | $ | — |  |  | $ | (29 | ) |  | $ | 31,979 |
Schedule of Fair Value Hierarchy Financial Assets | The following table represents the Company’s fair value hierarchy for its financial assets (cash equivalents and investments) (in thousands): Schedule of Fair Value Hierarchy Financial Assets
|  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
|  | March 31, 2022 (Unaudited) |
|  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Money market funds |  | $ | 6,299 |  |  | $ | 6,299 |  |  | $ | — |  |  | $ | — |
Corporate notes and commercial paper |  |  | 19,454 |  |  |  | — |  |  |  | 19,454 |  |  |  | — |
Total financial assets |  | $ | 25,753 |  |  | $ | 6,299 |  |  | $ | 19,454 |  |  | $ | — |
|  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
|  | December 31, 2021 |
|  | Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Money market funds |  | $ | 5,484 |  |  | $ | 5,484 |  |  | $ | — |  |  | $ | — |
Corporate notes and commercial paper |  |  | 23,011 |  |  |  | — |  |  |  | 23,011 |  |  |  | — |
Total financial assets |  | $ | 28,495 |  |  | $ | 5,484 |  |  | $ | 23,011 |  |  | $ | — |
Schedule of Derivative Liability Transactions | As of March 31, 2022, the fair value of the derivative liability amounted to $120,000. The details of derivative liability transactions for the three months ended March 31, 2022 and 2021, are as follows: Schedule of Derivative Liability Transactions
|  | March 31, 2022 |  |  | March 31, 2021 |
|  |  | (Unaudited) |  |  |  | (Unaudited) |
Beginning balance |  | $ | 138,000 |  |  | $ | 383,000 |
Fair value upon issuance of warrants |  |  | - |  |  |  | - |
Change in fair value |  |  | (18,000 | ) |  |  | (21,000 | )
Extinguishment |  |  | - |  |  |  | - |
Ending balance |  | $ | 120,000 |  |  | $ | 362,000 |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 + Details
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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI https://asc.fasb.org/extlink&oid=126976982&loc=SL7498348-110258 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of derivative liabilities at fair value. + References No definition available. + Details
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