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Note 4 - Related Party Transactions - Significant Activities Between Partnerships (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Net Profits Interests Payments Receivableor Accrued [Member] |  |  |
Related Party Transaction, Amounts of Transaction | $ 7,170 | $ 6,822 | $ 1,914
Net Profits Interests Revenue [Member] |  |  |
Related Party Transaction, Amounts of Transaction | 28,207 | 17,596 | 8,714
General and Administrative Amounts (Receivable) Payable[Member] |  |  |
Related Party Transaction, Amounts of Transaction | 68 | 85 | 486
Total General and Administrative Expenses [Member] |  |  |
Related Party Transaction, Amounts of Transaction | $ 3,399 | $ 571 | $ 2,905

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- Definition Amount of transactions with related party during the financial reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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- Details
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- Details
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Data Type: | na
Balance Type: |
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- Details
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