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Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2023
Investments, All Other Investments [Abstract] |
Schedule of Cash and Marketable Securities by Significant Investment Category | The following tables show the Company’s cash, cash equivalents, restricted cash, and marketable securities by significant investment category as of September 30, 2023, and December 31, 2022: Schedule of Cash and Marketable Securities by Significant Investment Category
|  | 2023 |
|  |  |  |  | Unrealized Gain/ |  |  | Fair |  |  | Cash and Cash |  |  | Marketable |
|  | Cost |  |  | (Loss) |  |  | Value |  |  | Equivalents |  |  | Securities |
Cash |  | $ | 6,827,000 |  |  | $ | - |  |  | $ | 6,827,000 |  |  | $ | 6,827,000 |  |  | $ | - |
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  |  | 70,000 |  |  |  | - |  |  |  | 70,000 |  |  |  | 70,000 |  |  |  | - |
Marketable Securities |  |  | 19,103,000 |  |  |  | (8,039,000 | ) |  |  | 11,064,000 |  |  |  | - |  |  |  | 11,064,000 |
Total |  | $ | 26,000,000 |  |  | $ | (8,039,000 | ) |  | $ | 17,961,000 |  |  | $ | 6,897,000 |  |  | $ | 11,064,000 |
|  | 2022 |
|  |  |  |  | Unrealized Gain/ |  |  | Fair |  |  | Cash and Cash |  |  | Marketable |  |  |  |
|  | Cost |  |  | (Loss) |  |  | Value |  |  | Equivalents |  |  | Securities |  |  | Investments |
Cash |  | $ | 19,226,000 |  |  | $ | - |  |  | $ | 19,226,000 |  |  | $ | 19,226,000 |  |  | $ | - |  |  | $ | - |
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  |  | 64,000 |  |  |  | - |  |  |  | 64,000 |  |  |  | 64,000 |  |  |  | - |  |  |  | - |
Marketable Securities |  |  | 36,263,000 |  |  |  | (3,659,000 | ) |  |  | 27,307,000 |  |  |  | - |  |  |  | 27,307,000 |  |  |  | - |
Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants |  |  | 3,318,000 |  |  |  | - |  |  |  | 140,000 |  |  |  | - |  |  |  | - |  |  |  | 140,000 |
Convertible securities |  |  | 1,023,000 |  |  |  | - |  |  |  | 39,000 |  |  |  | - |  |  |  | - |  |  |  | 39,000 |
Total |  | $ | 59,894,000 |  |  | $ | (3,659,000 | ) |  | $ | 46,776,000 |  |  | $ | 19,290,000 |  |  | $ | 27,307,000 |  |  | $ | 179,000 |

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