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Note 2 - Fair Value Measurements (Details Textual) - USD ($)
$ in Thousands
Jan. 31, 2025
Sep. 15, 2022
The 2025 Note Warrants [Member]    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 805,263  
The 2022 Note [Member] | Convertible Debt [Member]    
Debt Instrument, Face Amount   $ 10,500
The 2025 Note [Member]    
Debt Instrument, Face Amount $ 3,240  
The 2025 Note [Member] | Convertible Debt [Member]    
Debt Instrument, Face Amount $ 3,000