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Note 4 - Investments | 3 Months Ended
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Dec. 31, 2023
Notes to Financial Statements |
Investment [Text Block] | Note 4. Investments The Company invests in certificates of deposit that are fully insured by the Federal Deposit Insurance Corporation ("FDIC") and United States Treasury securities with terms of not more than five years, as well as money market funds. The Company’s investment portfolio is classified as available-for-sale, which is reported at fair value. The unrealized gain or loss on investment securities is recorded in other comprehensive income (loss), net of tax. Realized gains and losses on available-for-sale securities are recognized upon sale and are included in net investment income in the consolidated statement of earnings. As of December 31, 2023, available-for-sale investments consisted of the following:
|  | December 31, 2023 |
(In thousands) |  | Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
Short-Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 123,932 |  |  | $ | 30 |  |  | $ | 13 |  |  | $ | 123,949 |
Certificates of deposit |  |  | 4,446 |  |  |  | - |  |  |  | 43 |  |  |  | 4,403 |
Investment securities – short-term |  | $ | 128,378 |  |  | $ | 30 |  |  | $ | 56 |  |  | $ | 128,352 |
Long-Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S Treasury securities |  | $ | 6,728 |  |  | $ | - |  |  | $ | 448 |  |  | $ | 6,280 |
Certificates of deposit |  |  | 248 |  |  |  | - |  |  |  | 23 |  |  |  | 225 |
Investment securities – long-term |  | $ | 6,976 |  |  | $ | - |  |  | $ | 471 |  |  | $ | 6,505 |
As of September 30, 2023, available-for-sale investments consist of the following:
|  | September 30, 2023 |
(In thousands) |  | Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
Short-Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S treasury securities |  | $ | 122,534 |  |  | $ | - |  |  | $ | 143 |  |  | $ | 122,391 |
Certificates of deposit |  |  | 8,014 |  |  |  | - |  |  |  | 119 |  |  |  | 7,895 |
Investment securities – short-term |  | $ | 130,548 |  |  | $ | - |  |  | $ | 262 |  |  | $ | 130,286 |
Long-Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S treasury securities |  | $ | 6,719 |  |  | $ | - |  |  | $ | 596 |  |  | $ | 6,123 |
Certificates of deposit |  |  | 248 |  |  |  | - |  |  |  | 28 |  |  |  | 220 |
Investment securities – long-term |  | $ | 6,967 |  |  | $ | - |  |  | $ | 624 |  |  | $ | 6,343 |
As of December 31, 2023, investments in debt securities in an unrealized loss position were as follows:
|  | In Unrealized Loss Position For Less Than 12 Months |  |  | In Unrealized Loss Position For Greater Than 12 Months |
(In thousands) |  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |
U.S treasury securities |  | $ | 38,207 |  |  | $ | 50 |  |  | $ | 6,280 |  |  | $ | 444 |
Certificates of deposit |  |  | 245 |  |  |  | - |  |  |  | 4,384 |  |  |  | 65 |
Investment securities |  | $ | 38,452 |  |  | $ | 50 |  |  | $ | 10,664 |  |  | $ | 509 |
As of September 30, 2023, investments in debt securities in an unrealized loss position were as follows:
|  | In Unrealized Loss Position For Less Than 12 Months |  |  | In Unrealized Loss Position For Greater Than 12 Months |
(In thousands) |  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |
U.S treasury securities |  | $ | 112,908 |  |  | $ | 131 |  |  | $ | 15,606 |  |  | $ | 608 |
Certificates of deposit |  |  | 245 |  |  |  | - |  |  |  | 7,870 |  |  |  | 147 |
Investment securities |  | $ | 113,153 |  |  | $ | 131 |  |  | $ | 23,476 |  |  | $ | 755 |
As of December 31, 2023, there were 25 securities in an unrealized loss position which is due to the market paying a higher interest rate than the coupon rate on these securities. As of September 30, 2023, there were 42 securities in an unrealized loss position which is due to the securities paying lower interest rates than the market. As of December 31, 2023 and September 30, 2023, there are no securities which are other than temporarily impaired as the Company intends to hold these securities until their value recovers and there is negligible credit risk due to the nature of the securities which are backed by the FDIC and U.S. federal government.

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