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Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2021
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, 2021, and December 31, 2020: Schedule of Cash and Marketable Securities by Significant Investment Category
|  | 2021 |
|  | Adjusted Cost |  |  | Unrealized Gain/(Loss) |  |  | Fair Value |  |  | Cash, Cash Equivalents, and Restricted Cash |  |  | Marketable Securities |  |  | Investments |
Cash and cash equivalents |  | $ | 51,438,000 |  |  | $ | - |  |  | $ | 51,438,000 |  |  | $ | 51,438,000 |  |  | $ | - |  |  | $ | - |
Restricted cash |  |  | 350,000 |  |  |  | - |  |  |  | 350,000 |  |  |  | 350,000 |  |  |  | - |  |  |  | - |
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  |  | 17,699,000 |  |  |  | - |  |  |  | 17,699,000 |  |  |  | 17,699,000 |  |  |  | - |  |  |  | - |
Marketable Securities |  |  | 6,608,000 |  |  |  | 2,599,000 |  |  |  | 9,207,000 |  |  |  | - |  |  |  | 9,207,000 |  |  |  | - |
Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants |  |  | 15,657,000 |  |  |  | (9,121,000 | ) |  |  | 6,536,000 |  |  |  | - |  |  |  | - |  |  |  | 6,536,000 |
Total |  | $ | 91,752,000 |  |  | $ | (6,522,000 | ) |  | $ | 85,230,000 |  |  | $ | 69,487,000 |  |  | $ | 9,207,000 |  |  | $ | 6,536,000 |
|  | 2020 |
|  | Adjusted Cost |  |  | Unrealized Gain/(Loss) |  |  | Fair Value |  |  | Cash and Cash Equivalents |  |  | Marketable Securities |  |  | Investment |
Cash and cash equivalents |  | $ | 1,690,000 |  |  | $ | - |  |  | $ | 1,690,000 |  |  | $ | 1,690,000 |  |  | $ | - |  |  | $ | - |
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  |  | 3,493,000 |  |  |  | - |  |  |  | 3,493,000 |  |  |  | 3,493,000 |  |  |  | - |  |  |  | - |
Marketable Securities |  |  | 5,641,000 |  |  |  | 3,495,000 |  |  |  | 9,136,000 |  |  |  | - |  |  |  | 9,136,000 |  |  |  | - |
Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants |  |  | 700,000 |  |  |  | 356,000 |  |  |  | 1,056,000 |  |  |  | - |  |  |  | - |  |  |  | 1,056,000 |
Total |  | $ | 11,524,000 |  |  | $ | 3,851,000 |  |  | $ | 15,375,000 |  |  | $ | 5,183,000 |  |  | $ | 9,136,000 |  |  | $ | 1,056,000 |

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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