XML 62 R52.htm IDEA: XBRL DOCUMENT v3.24.0.1
Note 6 - Fair Value Measurements - Unrealized Loss on Investments (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Sep. 30, 2023
Unrealized loss position, less than 12 months, fair value $ 3,510 $ 684
Unrealized loss position, less than 12 months, gross unrealized loss (3) (2)
Unrealized loss position, more than 12 months, fair value 132 496
Unrealized loss position, more than 12 months, gross unrealized loss (2) (8)
Unrealized loss position, fair value 3,642 10
Unrealized loss position, gross unrealized loss (5) (1,180)
Short-term Securities 5 1,180
Long-term Securities (3,642) (10)
Certificates of Deposit [Member]    
Unrealized loss position, less than 12 months, fair value 0 0
Unrealized loss position, less than 12 months, gross unrealized loss 0 0
Unrealized loss position, more than 12 months, fair value 0 0
Unrealized loss position, more than 12 months, gross unrealized loss 0 0
Unrealized loss position, fair value 0 0
Unrealized loss position, gross unrealized loss 0 0
Short-term Securities (0) (0)
Long-term Securities 0 0
US Treasury and Government [Member]    
Unrealized loss position, less than 12 months, fair value 0 0
Unrealized loss position, less than 12 months, gross unrealized loss 0 0
Unrealized loss position, more than 12 months, fair value 0 0
Unrealized loss position, more than 12 months, gross unrealized loss 0 0
Unrealized loss position, fair value 0 0
Unrealized loss position, gross unrealized loss 0 0
Short-term Securities (0) (0)
Long-term Securities 0 0
US States and Political Subdivisions Debt Securities [Member]    
Unrealized loss position, less than 12 months, fair value 628 684
Unrealized loss position, less than 12 months, gross unrealized loss (1) (2)
Unrealized loss position, more than 12 months, fair value 132 235
Unrealized loss position, more than 12 months, gross unrealized loss (2) (5)
Unrealized loss position, fair value 760 919
Unrealized loss position, gross unrealized loss (3) (7)
Short-term Securities 3 7
Long-term Securities (760) (919)
Corporate Debt Securities [Member]    
Unrealized loss position, less than 12 months, fair value 2,882 0
Unrealized loss position, less than 12 months, gross unrealized loss (2) 0
Unrealized loss position, more than 12 months, fair value 0 261
Unrealized loss position, more than 12 months, gross unrealized loss 0 (3)
Unrealized loss position, fair value 2,882 261
Unrealized loss position, gross unrealized loss (2) (3)
Short-term Securities 2 3
Long-term Securities $ (2,882) $ (261)