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Accounts Payable (Details Narrative) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Reserach and development expenses | $ 2,095 | $ 1,139 | $ 3,745 | $ 3,226 |
Stock Issued During Period, Value, New Issues |  |  | 6,268 |  |
Accounts Payable, Current | 3,501 |  | 3,501 |  | $ 3,140
Common Stock [Member] |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Accounts Payable | 1,100 |  | $ 1,100 |  |
Stock Issued During Period, Shares, New Issues |  |  | 3,600 |  |
Stock Issued During Period, Value, New Issues |  |  | $ 4 |  |
Service Agreement [Member] | Third Party Manufacturer [Member] | Common Stock [Member] |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Accounts Payable | 2,900 |  | 2,900 |  | $ 2,300
Reserach and development expenses | 2,100 | $ 1,100 | 3,700 | $ 3,200 |
Cash received | 1,100 |  | $ 1,100 |  |
Stock Issued During Period, Shares, New Issues |  |  | 1,300 |  |
Stock Issued During Period, Value, New Issues |  |  | $ 591 |  |
Accounts Payable, Current | $ 1,100 |  | 1,100 |  |
Gain (Loss) Related to Litigation Settlement |  |  | $ 547 |  |

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