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Note 8 - Leases (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Leases, Right-of-use Assets and Lease Liabilities By Business Segment [Table Text Block] |
(in thousands) |  | Electric |  |  | Manufacturing |  |  | Plastics |  |  | Corporate |  |  | Total |
Right of Use Assets – Operating Leases: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross |  | $ | 4,137 |  |  | $ | 20,347 |  |  | $ | 666 |  |  | $ | 769 |  |  | $ | 25,919 |
Accumulated Amortization |  |  | (1,166 | ) |  |  | (2,375 | ) |  |  | (395 | ) |  |  | (132 | ) |  |  | (4,068 | )
Net of Accumulated Amortization |  | $ | 2,971 |  |  | $ | 17,972 |  |  | $ | 271 |  |  | $ | 637 |  |  | $ | 21,851 |
Obligations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current Operating Lease Liabilities |  | $ | 1,116 |  |  | $ | 2,609 |  |  | $ | 256 |  |  | $ | 155 |  |  | $ | 4,136 |
Long-Term Operating Lease Liabilities |  |  | 2,176 |  |  |  | 15,470 |  |  |  | 15 |  |  |  | 532 |  |  |  | 18,193 |
Total Lease Liabilities |  | $ | 3,292 |  |  | $ | 18,079 |  |  | $ | 271 |  |  | $ | 687 |  |  | $ | 22,329 |
Lessee, Operating Lease, Liability, Maturity [Table Text Block] |
|  | Right-of-Use Operating Leases |
(in thousands) |  | OTP |  |  | Nonelectric |  |  | Total |
2020 |  | $ | 1,243 |  |  | $ | 3,969 |  |  | $ | 5,212 |
2021 |  |  | 1,228 |  |  |  | 3,717 |  |  |  | 4,945 |
2022 |  |  | 326 |  |  |  | 3,588 |  |  |  | 3,914 |
2023 |  |  | 268 |  |  |  | 3,303 |  |  |  | 3,571 |
2024 |  |  | 217 |  |  |  | 2,870 |  |  |  | 3,087 |
Beyond 2024 |  |  | 283 |  |  |  | 5,304 |  |  |  | 5,587 |
Total Minimum Obligations |  | $ | 3,565 |  |  | $ | 22,751 |  |  | $ | 26,316 |
Interest Component of Obligations |  |  | (273 | ) |  |  | (3,714 | ) |  |  | (3,987 | )
Present Value of Minimum Obligations, December 31, 2019 |  | $ | 3,292 |  |  | $ | 19,037 |  |  | $ | 22,329 |
Lessee, Operating Lease, Lease Obligation Activity [Table Text Block] |
(in thousands) |  | OTP |  |  | Nonelectric |  |  | Total |
Operating Lease Obligations, January 1, 2019 |  | $ | 3,609 |  |  | $ | 16,760 |  |  | $ | 20,369 |
Non-cash Acquisition of Right-of-Use Assets |  |  | 758 |  |  |  | 5,560 |  |  |  | 6,318 |
Lease Adjustments/Modifications |  |  | 71 |  |  |  | (187 | ) |  |  | (116 | )
Lease Obligation Payments |  |  | (1,316 | ) |  |  | (4,055 | ) |  |  | (5,371 | )
Interest Component of Lease Obligation Payment |  |  | 170 |  |  |  | 959 |  |  |  | 1,129 |
Operating Lease Obligations, December 31, 2019 |  | $ | 3,292 |  |  | $ | 19,037 |  |  | $ | 22,329 |
Lease, Cost [Table Text Block] |
|  | Operating Lease Cost |  |  | Variable Lease Cost |  |  | Total Lease Cost |
Plant in Service or CWIP |  | $ | 29 |  |  | $ | - |  |  | $ | 29 |
Inventory |  |  | 952 |  |  |  | - |  |  |  | 952 |
Cost of Products Sold |  |  | 3,848 |  |  |  | 1,068 |  |  |  | 4,916 |
Electric Operation and Maintenance Expenses |  |  | 334 |  |  |  | - |  |  |  | 334 |
Other Nonelectric Expenses |  |  | 208 |  |  |  | - |  |  |  | 208 |
Total |  | $ | 5,371 |  |  | $ | 1,068 |  |  | $ | 6,439 |

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