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6. Convertible Notes (Details Narrative) - USD ($) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 30, 2021 | Apr. 30, 2021 | Mar. 31, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Aug. 31, 2021
Short-Term Debt [Line Items] |  |  |  |  |  |
Warrant exercise price per share |  |  |  | $ 10.80 | $ 10.80 |
IPO [Member] |  |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |  |
Conversion of stock, shares converted | 708,820 |  |  |  |  |
Warrant exercise price per share | $ 10.80 |  |  |  |  |
2020 Convertible Notes [Member] |  |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |  |
Debt interest rate |  |  |  | 5.00% |  |
Maximum possible total proceeds from convertible notes |  |  | $ 10,000,000.0 |  |  |
Debt conversion price percentage |  |  | 80.00% |  |  |
Fair value of derivative liability |  |  |  | $ 0 | $ 0 |
Amortization of debt discount and debt issuance costs |  |  |  | $ 0 | $ 379,000 |
Debt effective interest rate |  |  |  | 0.00% | 0.00% |
Interest expense |  |  |  | $ 0 | $ 101,000 |
2020 Convertible Notes [Member] | IPO [Member] |  |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |  |
Debt effective interest rate |  |  |  |  | 8.60% |
2021 Convertible Notes [Member] |  |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |  |
Debt interest rate |  |  |  |  | 46.50% |
Fair value of derivative liability |  |  |  |  | $ 363,000 |
Amortization of debt discount and debt issuance costs |  |  |  | 0 | $ 386,000 |
Debt effective interest rate |  |  |  |  | 5.00% |
Debt issuance costs |  |  |  |  | $ 23,000 |
Interest expense |  |  |  | $ 0 | 38,000 |
2020 and 2021 Convertible Notes [Member] |  |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |  |
Convertible notes payable |  |  |  |  | 5,300,000 |
Debt interest rate |  |  |  |  |  | 12.50%
Unamortized debt discount |  |  |  |  | $ 78,000 |
Note Purchase Agreement [Member] |  |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |  |
Convertible notes payable |  |  | $ 4,000,000.0 |  |  |
Debt instrument, maturity date |  |  | Mar. 31, 2021 |  |  |
Note Purchase Agreement [Member] | 2020 Convertible Notes [Member] |  |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |  |
Debt face amount |  |  | $ 3,000,000.0 |  |  |
Debt interest rate |  |  | 5.00% |  |  |
Note Purchase Agreement [Member] | 2020 and 2021 Convertible Notes [Member] |  |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |  |
Debt face amount |  | $ 2,000,000.0 |  |  |  |
Note Purchase Agreement [Member] | 2021 Convertible Notes [Member] |  |  |  |  |  |
Short-Term Debt [Line Items] |  |  |  |  |  |
Debt interest rate |  | 5.00% |  |  |  |
Debt conversion price percentage |  | 87.50% |  |  |  |

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