v3.26.1
Note 3 - Fair Value of Financial Instruments - Financial Assets Measured on a Recurring Basis 1 (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Dec. 31, 2024
Money Market Funds [Member]      
Money market funds, Fair Value $ 44,121 $ 46,164 $ 16,489
Fair Value, Recurring [Member]      
Total assets 57,185 60,224 42,983
Fair Value, Recurring [Member] | US Treasury Securities [Member]      
Investments, Fair Value Disclosure 4,188 14,060 23,805
Fair Value, Recurring [Member] | Commercial Paper [Member]      
Investments, Fair Value Disclosure 8,876    
Fair Value, Recurring [Member] | Money Market Funds [Member]      
Money market funds, Fair Value 44,121 46,164 16,489
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]      
Total assets 44,121 46,164 16,489
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]      
Investments, Fair Value Disclosure 0 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Paper [Member]      
Investments, Fair Value Disclosure 0    
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]      
Money market funds, Fair Value 44,121 46,164 16,489
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Total assets 13,064 14,060 26,494
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]      
Investments, Fair Value Disclosure 4,188 14,060 23,805
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Paper [Member]      
Investments, Fair Value Disclosure 8,876    
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]      
Money market funds, Fair Value 0 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Total assets 0 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury Securities [Member]      
Investments, Fair Value Disclosure 0 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Paper [Member]      
Investments, Fair Value Disclosure 0    
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]      
Money market funds, Fair Value $ 0 $ 0 $ 0