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Non-controlling Interest (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended | 28 Months Ended
--- | --- | --- | --- | ---
Sep. 05, 2018 | Sep. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Noncontrolling Interest |  |  |  |  |  |  |  |  |
Related Party Transaction, Expenses from Transactions with Related Party |  |  |  |  |  |  |  |  | $ 328,000
Research and Development Expense |  | $ 1,972,000 |  | $ 914,000 |  |  | $ 5,021,000 | $ 4,152,000 |
Net Income (Loss) Attributable to Noncontrolling Interest |  | $ 0 | $ (1,000) | (8,000) | $ (16,000) | $ (26,000) | $ (1,000) | (50,000) |
SYN Biomics [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |  |  |  |
Equity interest by parent |  | 83.00% |  |  |  |  | 83.00% |  |
Related Party Transaction, Expenses from Transactions with Related Party |  | $ 0 |  |  |  |  | $ 0 |  |
Research and Development Expense |  |  |  | 134,000 |  |  |  | 225,000 |
Accumulated net loss attributable to the non-controlling interest |  | $ 2,800,000 |  | $ 2,800,000 |  |  | $ 2,800,000 | $ 2,800,000 |
Cedarssinai Medical Center [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |  |  |  |
Number Of Common Stock To Be Issued | 50,000 |  |  |  |  |  |  |  |
Fair Value Of Shares Issued | $ 285,000 |  |  |  |  |  |  |  |
Cedarssinai Medical Center [Member] | SYN Biomics [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |  |  |  |
Additional Number Of Common Stock To Be Issued | 2,420,000 |  |  |  |  |  |  |  |
Number Of Common Stock To Be Held By Related Party | 7,480,000 |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 17.00% |  |  |  |  |  |  |  |

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