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Note 14 - Basic and Diluted Net Loss Per Share - Anti-dilutive Securities (Details) - shares
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Anti-dilutive securities (in shares) 2,425,512 716,512
Warrant [Member]    
Anti-dilutive securities (in shares) 1,721,381 335,214
Share-Based Payment Arrangement, Option [Member]    
Anti-dilutive securities (in shares) 376,269 134,333
Restricted Stock Units (RSUs) [Member]    
Anti-dilutive securities (in shares) 311,194 0
Deferred Stock Units [Member]    
Anti-dilutive securities (in shares) 16,668 0
Stock Issuable Pursuant to Series C Preferred Stock [Member]    
Anti-dilutive securities (in shares) 0 246,965