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Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2022
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 March 31, 2022, and December 31, 2021: Schedule of Cash and Marketable Securities by Significant Investment Category
|  | 2022 |
|  | Adjusted Cost |  |  | Unrealized Gain/(Loss) |  |  | Fair Value |  |  | Cash and Cash Equivalents |  |  | Marketable Securities |  |  | Investments |
Cash |  | $ | 48,799,000 |  |  | $ | - |  |  | $ | 48,799,000 |  |  | $ | 48,799,000 |  |  | $ | - |  |  | $ | - |
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  |  | 5,012,000 |  |  |  | - |  |  |  | 5,012,000 |  |  |  | 5,012,000 |  |  |  | - |  |  |  | - |
Marketable Securities |  |  | 15,865,000 |  |  |  | 2,570,000 |  |  |  | 18,435,000 |  |  |  | - |  |  |  | 18,435,000 |  |  |  | - |
Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants |  |  | 3,318,000 |  |  |  | - |  |  |  | 3,318,000 |  |  |  | - |  |  |  | - |  |  |  | 3,318,000 |
Convertible securities |  |  | 1,023,000 |  |  |  | 357,000 |  |  |  | 1,380,000 |  |  |  | - |  |  |  | - |  |  |  | 1,380,000 |
Total |  | $ | 74,017,000 |  |  | $ | 2,927,000 |  |  | $ | 76,944,000 |  |  | $ | 53,811,000 |  |  | $ | 18,435,000 |  |  | $ | 4,698,000 |
|  | 2021 |
|  | Adjusted Cost |  |  | Unrealized Gain/(Loss) |  |  | Fair Value |  |  | Cash and Cash Equivalents |  |  | Marketable Securities |  |  | Investments |
Cash |  | $ | 50,286,000 |  |  | $ | - |  |  | $ | 50,286,000 |  |  | $ | 50,286,000 |  |  | $ | - |  |  | $ | - |
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  | $ | 6,309,000 |  |  |  | - |  |  |  | 6,309,000 |  |  |  | 6,309,000 |  |  |  | - |  |  |  | - |
Marketable Securities |  | $ | 12,993,000 |  |  |  | 1,544,000 |  |  |  | 14,537,000 |  |  |  | - |  |  |  | 14,537,000 |  |  |  | - |
Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants |  | $ | 3,318,000 |  |  |  | - |  |  |  | 3,318,000 |  |  |  | - |  |  |  | - |  |  |  | 3,318,000 |
Convertible securities |  | $ | 1,023,000 |  |  |  | - |  |  |  | 1,023,000 |  |  |  | - |  |  |  | - |  |  |  | 1,023,000 |
Total |  | $ | 73,929,000 |  |  | $ | 1,544,000 |  |  | $ | 75,473,000 |  |  | $ | 56,595,000 |  |  | $ | 14,537,000 |  |  | $ | 4,341,000 |

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