Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Investments - Available-for-sale Investments (Details)

v3.24.2.u1
Note 4 - Investments - Available-for-sale Investments (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Sep. 30, 2023
Fair value $ 122,375 $ 136,629
Short-term US Treasury Securities [Member]    
Amortized cost 98,105 122,534
Unrealized gains 0 0
Unrealized losses (155) (143)
Fair value 97,950 122,391
Short-term Certificates of Deposit [Member]    
Amortized cost 247 8,014
Unrealized gains 0 0
Unrealized losses (2) (119)
Fair value 245 7,895
Short-term Investment [Member]    
Amortized cost 98,352 130,548
Unrealized gains 0 0
Unrealized losses (157) (262)
Fair value 98,195 130,286
US Treasury Securities [Member]    
Amortized cost   6,719
Unrealized gains   0
Unrealized losses   (596)
Fair value   6,123
Long-term Certificates of Deposit [Member]    
Amortized cost 248 248
Unrealized gains 0 0
Unrealized losses (18) (28)
Fair value 230 220
Long-term Investment [Member]    
Amortized cost 24,531 6,967
Unrealized gains 8 0
Unrealized losses (359) (624)
Fair value 24,180 $ 6,343
Long-term US Treasury Securities [Member]    
Amortized cost 24,283  
Unrealized gains 8  
Unrealized losses (341)  
Fair value $ 23,950