Note 6 - Income Taxes - Change in Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Balance of unrecognized tax benefits	$ 2,176	$ 1,943
Reductions due to lapse of applicable statute of limitations	(101)	(72)
Reductions due to tax positions of prior years		0
Reductions due to settlement with taxing authorities	0	0
Additions based on tax positions related to the current year	139	305
Additions due to tax positions of prior years	0
Balance of unrecognized tax benefits	$ 2,214	$ 2,176

Amount of unrecognized tax benefits.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 217
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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