Note 9 - Commitments and Contingencies (Details Textual) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Accrual for Environmental Loss Contingencies	$ 675,000	$ 675,000
Employment Disputes [Member]
Loss Contingency Accrual	$ 1,750,000

Total costs accrued as of the balance sheet date for environmental loss contingencies.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 410
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Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 410
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 410
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
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