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Note 3 - Business Combination - Allocation of the Purchase Price to the Fair Value of the Respective Assets and Liabilities Acquired (Details) - USD ($)
$ in Thousands
Nov. 30, 2021
Dec. 31, 2023
Dec. 31, 2022
Goodwill, Ending Balance   $ 4,508 $ 4,508
Acquisition of Kindred BioSciences [Member]      
Business combination, property and equipment acquired $ 321    
Goodwill, Ending Balance 4,508    
Business Combination, Consideration Transferred, Total $ 4,829