Quarterly report [Sections 13 or 15(d)]

Note 5 - Fair Value Measurements - Fair Value Measurements (Details)

v3.25.2
Note 5 - Fair Value Measurements - Fair Value Measurements (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Sep. 30, 2024
Cash equivalents $ 24,679 $ 10,378
Investment securities: 123,526 139,330
Fair Value, Inputs, Level 1 [Member]    
Cash equivalents 24,679 10,378
Investment securities: 0 0
Fair Value, Inputs, Level 2 [Member]    
Cash equivalents 0 0
Investment securities: 123,526 139,330
Fair Value, Inputs, Level 3 [Member]    
Cash equivalents 0 0
Investment securities: 0 0
Money Market Funds [Member]    
Cash equivalents 24,679 10,378
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash equivalents 24,679 10,378
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]    
Cash equivalents 0 0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]    
Cash equivalents 0 0
US Treasury Securities [Member]    
Investment securities: 123,285 138,592
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]    
Investment securities: 0 0
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Investment securities: 123,285 138,592
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]    
Investment securities: 0 0
Certificates of Deposit [Member]    
Investment securities: 241 738
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]    
Investment securities: 0 0
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]    
Investment securities: 241 738
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]    
Investment securities: $ 0 $ 0