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Note 11 - Related Party Transactions (Tables) | 9 Months Ended
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Sep. 30, 2023
Notes Tables |
Schedule of Related Party Transactions [Table Text Block] |
|  | For the Three Months Ended September 30, |  |  | For the Nine Months Ended September 30, |
(In thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Operating and maintenance expenses |  | $ | 1,663 |  |  | $ | 1,687 |  |  | $ | 5,094 |  |  | $ | 5,044 |
General and administrative expenses |  |  | 1,287 |  |  |  | 1,195 |  |  |  | 3,860 |  |  |  | 3,660 |

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration