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CONDENSED CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT (Unaudited) (Parentheticals) - $ / shares | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Cumulative preferred stock, price (in dollars per share) | $ 7.00 |
First Mortgage Bonds | Minimum |  |
Interest rate | 0.00% |
First Mortgage Bonds | Maximum |  |
Interest rate | 5.50% |
Amortizing Secured Notes | Minimum |  |
Interest rate | 3.94% |
Amortizing Secured Notes | Maximum |  |
Interest rate | 7.05% |
State Revolving Trust Notes | Minimum |  |
Interest rate | 0.00% |
State Revolving Trust Notes | Maximum |  |
Interest rate | 4.03% |
Convertible Preferred Stock $7.00 Series |  |
Cumulative preferred stock, price (in dollars per share) | $ 7.00 | $ 7.00
Nonredeemable Preferred Stock $7.00 Series |  |
Cumulative preferred stock, price (in dollars per share) | 7.00 | 7.00
Nonredeemable Preferred Stock $4.75 Series |  |
Cumulative preferred stock, price (in dollars per share) | $ 4.75 | $ 4.75

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