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v3.23.1

Liquidity and Going Concern Uncertainty (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2023 | Mar. 30, 2023 | Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 06, 2020 | Oct. 21, 2020
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Cash | $ 3,714 |  | $ 3,714 | $ 6,586 | $ 3,085 | $ 9,000 |  |
Working capital | $ 3,335 |  | 3,335 |  |  |  |  |
Net loss |  |  | (1,219) | (4,539) |  |  |  |
Net cash used in operating activities |  |  | $ (844) | $ (2,404) |  |  |  |
Preferred stock, convertible, par value (in dollars per share) | $ 0.0001 |  | $ 0.0001 |  | $ 0.0001 |  |  |
Exercise price (in dollars per share) | $ 6.66 |  | $ 6.66 |  | $ 66.34 | $ 66.34 | $ 82.35 | $ 61.20
Series F Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Percentage of common stock to be issued at minimum price | 19.99% |  | 19.99% |  |  |  |  |
Exercise price (in dollars per share) | $ 975 |  | $ 975 |  |  |  |  |
Private Placement | Preferred Warrants |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Number of shares issuable (in shares) | 32,750 | 32,750 | 32,750 |  |  |  |  |
Private Placement | Investor Warrants |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Number of shares issuable (in shares) |  | 3,830,413 |  |  |  |  |  |
Private Placement | Placement Agent Warrants |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Number of shares issuable (in shares) |  | 306,433 |  |  |  |  |  |
Exercise price (in dollars per share) |  | $ 1.71 |  |  |  |  |  |
Private Placement | Series F Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Number of shares issued (in shares) | 6,550 | 6,550 |  |  |  |  |  |
Preferred stock, convertible, par value (in dollars per share) |  | $ 0.0001 |  |  |  |  |  |
Shares issuable upon conversion (in shares) |  | 3,830,409 |  |  |  |  |  |
Gross proceeds |  | $ 6,386 |  |  |  |  |  |
Escrow deposit |  | $ 4,000 |  |  |  |  |  |
Percentage of common stock to be issued at minimum price |  | 19.99% |  |  |  |  |  |
Percentage of cash fees |  | 8.00% |  |  |  |  |  |

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