v3.26.1
Note 3 - Fair Value of Financial Instruments - Financial Assets Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Money Market Funds [Member]    
Money market funds, Fair Value $ 43,545 $ 46,164
Fair Value, Recurring [Member]    
Total assets 59,414 60,224
Fair Value, Recurring [Member] | US Treasury Securities [Member]    
Investments, Fair Value Disclosure 8,390 14,060
Fair Value, Recurring [Member] | Commercial Paper [Member]    
Investments, Fair Value Disclosure 7,479  
Fair Value, Recurring [Member] | Money Market Funds [Member]    
Money market funds, Fair Value 43,545 46,164
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Total assets 43,545 46,164
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]    
Investments, Fair Value Disclosure 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 43,545 46,164
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Total assets 15,869 14,060
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]    
Investments, Fair Value Disclosure 8,390 14,060
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Paper [Member]    
Investments, Fair Value Disclosure 7,479  
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]    
Money market funds, Fair Value 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Total assets 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury Securities [Member]    
Investments, Fair Value Disclosure 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