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Note 11 - Equity (Details Textual) $ / shares in Units, $ in Thousands |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 02, 2024 USD ($) $ / shares shares | May 13, 2024 USD ($) $ / shares shares | Apr. 11, 2024 shares | Dec. 31, 2024 USD ($) $ / shares shares | Dec. 31, 2024 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares
Common Stock, Shares, Outstanding (in shares) |  |  |  | 20,022,836 | 20,022,836 | 13,616,341
Treasury Stock, Common, Shares (in shares) |  |  |  | 768,595 | 768,595 | 768,595
Common Stock, Shares, Issued (in shares) |  |  |  | 20,791,431 | 20,791,431 | 14,384,936
Stock Issued During Period, Warrants Exercise, Shares (in shares) |  |  |  |  | 3,602,976 |
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares) |  |  |  |  | 0 | 51,903
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  |  |  | $ 0.0005 | $ 0.0005 | $ 0.0005
Stock Issued During Period, Value, New Issues | $ |  |  |  |  | $ 5,189 |
Proceeds from Issuance of Warrants | $ |  |  |  |  | 12,627 | $ 0
Treasury Stock, Common, Value | $ |  |  |  | $ 11,407 | $ 11,407 | $ 11,407
Preferred Stock, Shares Authorized (in shares) |  |  |  | 10,000,000 | 10,000,000 | 10,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  |  |  | $ 0.0001 | $ 0.0001 | $ 0.0001
Preferred Stock, Shares Issued (in shares) |  |  |  | 0 | 0 | 0
Preferred Stock, Shares Outstanding (in shares) |  |  |  | 0 | 0 | 0
May Pre-funded Warrants [Member] |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  | 2,955,084 |  |  |  |
Class of Warrant or Right, Purchase Price (in dollars per share) | $ / shares |  | $ 3.384 |  |  |  |
Warrants Issued, Underwriting Discounts or Commissions Paid | $ |  | $ 0 |  |  |  |
Proceeds from Issuance of Warrants | $ |  | 10,000 |  |  |  |
Warrants Issued, Amount of Offering Expenses Payable | $ |  | $ 100 |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  | $ 0.0005 |  |  |  |
December Pre-funded Warrants [Member] |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 1,187,802 |  |  |  |  |
Class of Warrant or Right, Purchase Price (in dollars per share) | $ / shares | $ 2.3147 |  |  |  |  |
Warrants Issued, Underwriting Discounts or Commissions Paid | $ | $ 0 |  |  |  |  |
Proceeds from Issuance of Warrants | $ | 2,750 |  |  |  |  |
Warrants Issued, Amount of Offering Expenses Payable | $ | $ 22 |  |  |  |  |
Class of Warrant or Right, Exercised During Period (in shares) |  |  |  | 647,892 |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares) |  |  |  |  | 319,933 | 255,406
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares) |  |  |  |  | 0 | 51,903
Direct Offering [Member] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 2,483,586 |  |  |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares | $ 0.0005 |  |  |  |  |
Proceeds from Issuance of Common Stock, Gross | $ | $ 5,750 |  |  |  |  |
Stock Issuance, Offering Costs Payable | $ | $ 562 |  |  |  |  |
Registered Direct Offering Through Agent [Member] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 1,943,676 |  |  |  |  |
Registered Direct Offering by An Customer [Member] |  |  |  |  |  |
Stock Issued, Cash Fee, Percentage of Gross Proceeds Raised | 4.00% |  |  |  |  |
Stock Issued During Period, Value, New Issues | $ | $ 4,500 |  |  |  |  |
Reverse Stock Split [Member] |  |  |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio |  |  | 6 |  |  |
Common Stock, Shares, Outstanding (in shares) |  |  | 13,660,598 |  |  | 81,571,864
Treasury Stock, Common, Shares (in shares) |  |  | 768,595 |  |  | 4,611,569

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