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3. Short-Term Marketable Securities | 12 Months Ended
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Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
3. Short-Term Marketable Securities | 3. Short-Term Marketable Securities The tables summarize the Company’s short-term marketable securities as of December 31, 2022. There were no short-term marketable securities as of December 31, 2021 (in thousands): Schedule of Short-Term Marketable Securities
|  | Amortized Cost Basis |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
U.S. Treasury bills |  | $ | 2,032 |  |  | $ | 17 |  |  | $ | - |  |  | $ | 2,049 |
|  | $ | 2,032 |  |  | $ | 17 |  |  | $ | - |  |  | $ | 2,049 |

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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