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v3.23.1

Note 18 - Subsequent Events (Details Textual) $ / shares in Units, $ in Thousands | Apr. 27, 2023 USD ($) $ / shares shares | Apr. 26, 2023 $ / shares shares | Mar. 31, 2023 $ / shares | Dec. 31, 2022 $ / shares
--- | --- | --- | --- | ---
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  | $ 7.70 | $ 7.70
Subsequent Event [Member] |  |  |  |
Proceeds from Issuance of Private Placement | $ | $ 3,000 |  |  |
Subsequent Event [Member] | Series B Preferred Stock and Series C Preferred Stock [Member] |  |  |  |
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares | $ 1.30 | $ 6.30 |  |
Convertible Preferred Stock, Shares Issued upon Conversion (in shares) | 770 | 159 |  |
Preferred Stock, Convertible, Increase in Shares Issuable (in shares) | 7,863,570 |  |  |
Subsequent Event [Member] | Ladenburg Thalmann and Co. Inc. [Member] |  |  |  |
Private Placement, Placement Agent Fee, Percentage of Gross Proceeds | 8.00% |  |  |
Payments of Stock Issuance Costs, Reimbursement of Expenses | $ | $ 55 |  |  |
Subsequent Event [Member] | Series B-1 Warrant [Member] |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 2,538,464 |  |  |
Warrants and Rights Outstanding, Term (Year) | 5 years |  |  |
Subsequent Event [Member] | Series B-2 Warrant [Member] |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 2,538,464 |  |  |
Warrants and Rights Outstanding, Term (Year) | 2 years |  |  |
Subsequent Event [Member] | Warrant Amendment Agreements [Member] |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 1,724,455 |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares | $ 1.30 | $ 6.30 |  |
Subsequent Event [Member] | Series B-1 and B-2 Warrants [Member] |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares | $ 1.30 |  |  |
Subsequent Event [Member] | Original Issue Discount Senior Secured Convertible Debentures Due November 1, 2024 [Member] |  |  |  |
Debt Instrument, Face Amount | $ | $ 3,300 |  |  |
Debt Instrument, Convertible, Number of Equity Instruments | 2,538,464 |  |  |
Maximum Percentage of Common Stock Outstanding | 19.99% |  |  |
Debt Instrument, Convertible, Maximum Issuable Shares Per Holder (in shares) | 438,669 |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares | $ 1.30 |  |  |
Debt Instrument, Monthly Redemption, Aggregate Principal Amount | 0.556 |  |  |
Debt Instrument, Monthly Redemption, Multiplier in Cash | 1.10 |  |  |
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger | 90.00% |  |  |
Debt Instrument, Convertible, Threshold Trading Days | 10 |  |  |
Debt Instrument, Default, Interest Rate | 18.00% |  |  |

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