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Note 12 - Fair Value Measurements (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 14, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 08, 2023
Impairment of Intangible Assets (Excluding Goodwill) |  |  |  |  | $ 8,300 |  | $ 0 |
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  |  |  |  | Asset Impairment Charges |
Stock Issued During Period, Shares, Warrants Exercised (in shares) |  |  | 367,478 |  |  |  |  |
Tranche B Common Warrants [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  |  |  |  |  |  | 2,173,912
Stock Issued During Period, Shares, Warrants Exercised (in shares) | 367,478 |  |  |  |  |  |  |
Tranche B Pre-Funded Warrants [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right, Issued During Period (in shares) | 1,806,434 |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 0.0001 |  |  |  |  |  |  |
Pre-Funded Warrants [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  | 8,233,332 |  |  | 8,233,332 |  |  |
Class of Warrant or Right, Issued During Period (in shares) |  | 8,233,332 |  |  | 8,233,332 | [1],[2] |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  | $ 0.0001 |  |  | $ 0.0001 |  |  |
Class of Warrant or Right, Offering Price (in dollars per share) |  | $ 1.4999 |  |  | $ 1.4999 |  |  |
Class of Warrant or Right, Exercised During Period (in shares) |  |  |  | 176,000 | 176,000 |  |  |
Class of Warrant or Right, Exercise Price, Exercised During Period (in dollars per share) |  |  |  | $ 0.0001 |  |  |  |
Fair Value, Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Fixed Payment Arrangements, Measurement Input |  | 10.00% |  |  | 10.00% |  |  |
Fair Value, Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Fixed Payment Arrangements, Measurement Input |  | 15.40% |  |  | 15.40% |  |  |
[1] | From July 2025 through the filing of this report, a total of 935,000 of the June 2025 Prefunded Warrants were exercised to 935,000 shares of common stock. See Note 14 - Stockholders’ Equity for further detail.
[2] | Relates to the June 2025 issuance of 8,233,332 prefunded warrants at a public offering price of $1.4999 to purchase 8,233,332 shares of the Company’s common stock at an exercise price of $0.0001 per share.

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