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Note 20 - Related Party Transactions - Related Party Balance Sheet Accounts (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Accounts receivable, related parties	[1]	$ 15,897	$ 16,459
Prepaid expenses – related parties		12	12
Related Party [Member]
Accounts receivable, related parties		1	6
Prepaid expenses – related parties		12	12
Natural gas and fuel purchases		42	7,799
Accrued liabilities, related parties		0	1
Related Party [Member] | Administrative Servicesand Other [Member]
Prepaid expenses – related parties		12	12
Related Party [Member] | Fuel [Member]
Natural gas and fuel purchases		0	7,788
Related Party [Member] | Travel and Administrative Services [Member]
Natural gas and fuel purchases		42	11
Accrued liabilities, related parties		0	1
Related Party [Member] | Biodiesel [Member]
Accounts receivable, related parties		$ 1	$ 6
[1] Exclusive of the BTC of $11,381 and $8,970, respectively, and net of allowances for bad debt of $55 and $48, respectively, as of the dates noted.

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- Definition

Amount of accrued expenses to related parties that are due within one year or within the normal operating cycle if longer.

+ References

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Sum of the amounts paid to related parties in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer.

+ References

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+ References

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