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Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2023
Investments, All Other Investments [Abstract] |
Schedule of Cash and Marketable Securities by Significant Investment Category | The following tables show the Company’s cash and marketable securities by significant investment category as of December 31: Schedule of Cash and Marketable Securities by Significant Investment Category
|  | 2023 |
|  | Cost |  |  | Unrealized Gain/Loss |  |  | Fair Value |  |  | Cash And Cash Equivalents |  |  | Marketable Securities |
Cash |  | $ | 6,545,000 |  |  | $ | - |  |  | $ | 6,545,000 |  |  | $ | 6,545,000 |  |  | $ | - |
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  |  | 70,000 |  |  |  | - |  |  |  | 70,000 |  |  |  | 70,000 |  |  |  | - |
Marketable Securities |  |  | 27,304,000 |  |  |  | (17,325,000 | ) |  |  | 9,979,000 |  |  |  | - |  |  |  | 9,979,000 |
Total |  | $ | 33,919,000 |  |  | $ | (17,325,000 | ) |  | $ | 16,594,000 |  |  | $ | 6,615,000 |  |  | $ | 9,979,000 |
|  | 2022 |
|  | Cost |  |  | Unrealized Gain/(Loss) |  |  | Fair Value |  |  | Cash and Cash Equivalents |  |  | Marketable Securities |  |  | Investment |
Cash |  | $ | 19,226,000 |  |  | $ | - |  |  | $ | 19,226,000 |  |  | $ | 19,226,000 |  |  | $ | - |  |  | $ | - |
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  |  | 64,000 |  |  |  | - |  |  |  | 64,000 |  |  |  | 64,000 |  |  |  | - |  |  |  | - |
Marketable Securities |  |  | 45,283,000 |  |  |  | (17,976,000 | ) |  |  | 27,307,000 |  |  |  | - |  |  |  | 27,307,000 |  |  |  | - |
Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants |  |  | 3,318,000 |  |  |  | - |  |  |  | 3,318,000 |  |  |  | - |  |  |  | - |  |  |  | 3,318,000 |
Convertible securities |  |  | 1,023,000 |  |  |  | - |  |  |  | 1,023,000 |  |  |  | - |  |  |  | - |  |  |  | 1,023,000 |
Total |  | $ | 68,914,000 |  |  | $ | (17,976,000 | ) |  | $ | 50,938,000 |  |  | $ | 19,290,000 |  |  | $ | 27,307,000 |  |  | $ | 4,341,000 |
Schedule of Net Unrealized (Loss) Gain Recognized on marketable Securities | The following tables shows the Company’s net unrealized (loss) gain recognized during the year on marketable securities still held as of December 31: Schedule of Net Unrealized (Loss) Gain Recognized on marketable Securities
|  | 2023 |  |  | 2022 |
Net gains (losses) recognized during the year on marketable securities |  | $ | (5,521,000 | ) |  | $ | (2,757,000 | )
Less: Net gains (losses) realized during the year on marketable securities sold during the period |  |  | (1,973,000 | ) |  |  | 1,077,000 |
Net unrealized gain (loss) recognized during the reporting year on marketable securities still held at the reporting date |  | $ | (3,548,000 | ) |  | $ | (3,834,000 | )

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