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Note 16 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($) $ in Millions | Apr. 30, 2025 | Apr. 28, 2025
--- | --- | ---
Former Employee [Member] |  |
Stock Issued During Period, Shares, New Issues (in shares) |  | 21,000
Inducement Agreement [Member] |  |
Stock Issued During Period, Shares, New Issues (in shares) |  | 340,000
Evoke Neuroscience, Inc. [Member] |  |
Business Combination, Consideration Transferred | $ 6.0 |
Payments to Acquire Businesses, Gross | $ 3.0 |
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares) | 857,149 |
Business Combination, Consideration Transferred, Equity Interest | $ 3.0 |
Evoke Neuroscience, Inc. [Member] | Earnout Targets [Member] |  |
Business Combination, Contingent Consideration, Liability | $ 0.5 |

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