v3.25.2
Note 12 - Fair Value - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Money Market Funds [Member]      
Cash Equivalents $ 2,636   $ 7,002
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]      
Cash Equivalents 2,636   7,002
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]      
Cash Equivalents 0   0
Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]      
Cash Equivalents 0   0
Common Stock Warrant Liability [Member]      
Derivative liabilities 2,546   4,541
Balance 4,541 $ 1,481  
Change in fair value (1,995) (259)  
Balance 2,546 1,222  
Common Stock Warrant Liability [Member] | Fair Value, Inputs, Level 1 [Member]      
Derivative liabilities 0   0
Common Stock Warrant Liability [Member] | Fair Value, Inputs, Level 2 [Member]      
Derivative liabilities 0   0
Common Stock Warrant Liability [Member] | Fair Value, Inputs, Level 3 [Member]      
Derivative liabilities 2,546   4,541
Derivatives Other Than Common Stock Warrants Liabilities [Member]      
Derivative liabilities 1,096   1,804
Balance 1,804    
Change in fair value (708)    
Balance 1,096    
Derivatives Other Than Common Stock Warrants Liabilities [Member] | Fair Value, Inputs, Level 1 [Member]      
Derivative liabilities 0   0
Derivatives Other Than Common Stock Warrants Liabilities [Member] | Fair Value, Inputs, Level 2 [Member]      
Derivative liabilities 0   0
Derivatives Other Than Common Stock Warrants Liabilities [Member] | Fair Value, Inputs, Level 3 [Member]      
Derivative liabilities $ 1,096   $ 1,804
Clene Nanomedicine Contingent Earn-out [Member]      
Balance   75  
Change in fair value   (75)  
Balance   0  
Initial Stockholders Contingent Earn-out [Member]      
Balance   10  
Change in fair value   (10)  
Balance   $ 0