The amortized cost, gross unrealized gains or losses, and fair value of investments classified as held-to-maturity and available-for-sale at June 30, 2026 and September 30, 2025 were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2026 | | | | | Gross Unrealized | | Estimated Fair | | Corporate and Government Bonds | | Amortized Cost | | Gains | | Losses | | Market Value | | Available-for-sale | | $ | 22,645 | | | $ | — | | | $ | (161) | | | $ | 22,484 | | | Held-to-maturity - short-term | | 17,576 | | | 3 | | | (1) | | | 17,578 | | | | | | | | | | | | Total investments | | $ | 40,221 | | | $ | 3 | | | $ | (162) | | | $ | 40,062 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2025 | | | | | Gross Unrealized | | Estimated Fair | | Corporate and Government Bonds | | Amortized Cost | | Gains | | Losses | | Market Value | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Held-to-maturity - short-term | | $ | 41,784 | | | $ | 30 | | | $ | (1) | | | $ | 41,813 | | | Held-to-maturity - long-term | | 4,234 | | | 9 | | | — | | | 4,243 | | | Total investments | | $ | 46,018 | | | $ | 39 | | | $ | (1) | | | $ | 46,056 | |
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