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Note 10 - Other Comprehensive Income (Loss) (Tables) | 6 Months Ended
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Mar. 31, 2022
Notes Tables |
Comprehensive Income (Loss) [Table Text Block] |
|  |  |  |  |  | Tax |  |  |  |
|  | Before-Tax |  |  | (Expense) |  |  | Net-of-Tax |
|  | Amount |  |  | or Benefit |  |  | Amount |
Three Months Ended March 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps: |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gains |  | $ | 1,903,875 |  |  | $ | (490,057 | ) |  | $ | 1,413,818 |
Transfer of realized losses to interest expense |  |  | 163,860 |  |  |  | (42,179 | ) |  |  | 121,681 |
Net interest rate swaps |  |  | 2,067,735 |  |  |  | (532,236 | ) |  |  | 1,535,499 |
Defined benefit plans: |  |  |  |  |  |  |  |  |  |  |  |
Amortization of actuarial gains |  |  | (15,070 | ) |  |  | 3,879 |  |  |  | (11,191 | )
Other comprehensive income |  | $ | 2,052,665 |  |  | $ | (528,357 | ) |  | $ | 1,524,308 |
Three Months Ended March 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps: |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gains |  | $ | 529,356 |  |  | $ | (136,257 | ) |  | $ | 393,099 |
Transfer of realized losses to interest expense |  |  | 136,270 |  |  |  | (35,075 | ) |  |  | 101,195 |
Net interest rate swaps |  |  | 665,626 |  |  |  | (171,332 | ) |  |  | 494,294 |
Defined benefit plans: |  |  |  |  |  |  |  |  |  |  |  |
Amortization of actuarial losses |  |  | 20,017 |  |  |  | (5,153 | ) |  |  | 14,864 |
Other comprehensive income |  | $ | 685,643 |  |  | $ | (176,485 | ) |  | $ | 509,158 |
|  |  |  |  |  | Tax |  |  |  |  |
|  | Before-Tax |  |  | (Expense) |  |  | Net-of-Tax |
|  | Amount |  |  | or Benefit |  |  | Amount |
Six Months Ended March 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps: |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gains |  | $ | 2,219,858 |  |  | $ | (571,390 | ) |  | $ | 1,648,468 |
Transfer of realized losses to interest expense |  |  | 335,723 |  |  |  | (86,418 | ) |  |  | 249,305 |
Net interest rate swaps |  |  | 2,555,581 |  |  |  | (657,808 | ) |  |  | 1,897,773 |
Defined benefit plans: |  |  |  |  |  |  |  |  |  |  |  |
Amortization of actuarial gains |  |  | (30,140 | ) |  |  | 7,758 |  |  |  | (22,382 | )
Other comprehensive income |  | $ | 2,525,441 |  |  | $ | (650,050 | ) |  | $ | 1,875,391 |
Six Months Ended March 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps: |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gains |  | $ | 619,126 |  |  | $ | (159,364 | ) |  | $ | 459,762 |
Transfer of realized losses to interest expense |  |  | 273,708 |  |  |  | (70,451 | ) |  |  | 203,257 |
Net interest rate swaps |  |  | 892,834 |  |  |  | (229,815 | ) |  |  | 663,019 |
Defined benefit plans: |  |  |  |  |  |  |  |  |  |  |  |
Amortization of actuarial losses |  |  | 40,034 |  |  |  | (10,306 | ) |  |  | 29,728 |
Other comprehensive income |  | $ | 932,868 |  |  | $ | (240,121 | ) |  | $ | 692,747 |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Accumulated |
|  |  |  |  |  |  |  |  |  | Other |
|  | Interest Rate |  |  | Defined Benefit |  |  | Comprehensive |
|  | Swaps |  |  | Plans |  |  | Income (Loss) |
Balance at September 30, 2021 |  | $ | (888,210 | ) |  | $ | (647,224 | ) |  | $ | (1,535,434 | )
Other comprehensive income (loss) |  |  | 1,897,773 |  |  |  | (22,382 | ) |  |  | 1,875,391 |
Balance at March 31, 2022 |  | $ | 1,009,563 |  |  | $ | (669,606 | ) |  | $ | 339,957 |

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=126968391&loc=d3e526-108580 + Details
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