Note 15 - Fair Values of Financial Instruments - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Cash and cash equivalents	$ 16	$ 3,967
Long-Term Debt, Fair Value	47,597	89,744
Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	16	3,967
Fair Value, Inputs, Level 2 [Member]
Long-Term Debt, Fair Value	$ 47,597	$ 89,744

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

No definition available.

Name:	us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant