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Financial Instruments and Fair Value Measurements (Financial Assets and Liabilities that are Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Financial assets: |  |
Total financial assets | $ 94,421 | $ 58,862
Financial liabilities: |  |
Cross-currency interest rate swaps | 440 |
Cross Currency Interest Rate Swaps [Member] |  |
Financial assets: |  |
Cross-currency interest rate swaps | 1,400 | 5,389
Financial liabilities: |  |
Cross-currency interest rate swaps | 440 |
Level 1 [Member] |  |
Financial assets: |  |
Total financial assets | 93,021 | 53,473
Level 2 [Member] |  |
Financial assets: |  |
Total financial assets | 1,400 | 5,389
Financial liabilities: |  |
Cross-currency interest rate swaps | 440 |
Level 2 [Member] | Cross Currency Interest Rate Swaps [Member] |  |
Financial assets: |  |
Cross-currency interest rate swaps | 1,400 | 5,389
Financial liabilities: |  |
Cross-currency interest rate swaps | 440 |
Investments in Banks and Financial Institutions [Member] |  |
Financial assets: |  |
Investments | 63,166 | 28,560
Investments in Banks and Financial Institutions [Member] | Level 1 [Member] |  |
Financial assets: |  |
Investments | 63,166 | 28,560
Equity Securities [Member] |  |
Financial assets: |  |
Equity securities | 29,855 | 24,913
Equity Securities [Member] | Level 1 [Member] |  |
Financial assets: |  |
Equity securities | $ 29,855 | $ 24,913

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