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v3.23.2

Note 9 - Debentures (Details Textual) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Apr. 27, 2023 USD ($) $ / shares shares | Jun. 30, 2023 USD ($) $ / shares | Jun. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) $ / shares | Jun. 30, 2022 USD ($) | Dec. 31, 2022 $ / shares
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  | $ 2.18 |  | $ 2.18 |  | $ 7.70
Proceeds From Debenture and Warrant Issuances, Net | $ 3,000 |  |  | $ 3,000 | $ 0 |
Fair Value Adjustment of Warrants |  | $ (216) | $ (0) | (216) | $ (2,056) |
The 2023 Private Placement [Member] |  |  |  |  |  |
Proceeds from Issuance of Warrants | 1,600 |  |  |  |  |
Proceeds from Derivative Instrument, Financing Activities | 200 |  |  |  |  |
Proceeds from Convertible Debt | $ 1,200 |  |  |  |  |
Ladenburg Thalmann and Co. Inc. [Member] |  |  |  |  |  |
Private Placement, Placement Agent Fee, Percentage of Gross Proceeds | 8.00% |  |  |  |  |
Series B-1 Warrant [Member] |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares | 2,538,464 |  |  |  |  |
Series B-2 Warrant [Member] |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares | 2,538,464 |  |  |  |  |
Warrants and Rights Outstanding, Term (Year) | 2 years |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares | $ 1.30 |  |  |  |  |
Original Issue Discount Senior Secured Convertible Debentures [Member] |  |  |  |  |  |
Debt Instrument, Face Amount | $ 3,300 | 1,185 |  | 1,185 |  |
Debt Instrument, Convertible, Number of Equity Instruments | 2,538,464 |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares | $ 1.30 |  |  |  |  |
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, Redemption Price, Percentage | 20.00% |  |  |  |  |
Debt Instrument, Default, Interest Rate | 18.00% |  |  |  |  |
Embedded Derivative, Fair Value | $ 209 | 169 |  | 169 |  |
Fair Value Adjustment of Warrants |  |  |  | 40 |  |
Debt Instrument, Unamortized Discount | 300 | $ 1,696 |  | $ 1,696 |  |
Debt Issuance Costs, Gross | 294 |  |  |  |  |
Debt Instrument, Redemption Price, Amount Per Month | $ 193 |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  | 173.00% |  | 173.00% |  |
Interest Expense, Debt |  | $ 501 |  | $ 501 |  |

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