Note 11 - Long-term Debt - Maturities of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
2024	$ 18,000
Thereafter	0
Long-term debt	$ 18,000	$ 18,000

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
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Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant