Note 7 - Components of Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Balance	$ 191,235	$ 195,781	$ 200,607	$ 183,726
Balance	190,853	202,194	190,853	202,194
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance	8,089	9,518	13,167	76
Unrealized holding gain (loss) on available for sale securities, net of tax	(3,403)	2,256	(8,477)	11,763
Reclassification adjustment, net of tax		(11)	(4)	(76)
Balance	4,686	11,763	4,686	11,763
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(10,147)	(8,582)	(10,147)	(8,582)
Balance	(10,147)	(8,582)	(10,147)	(8,582)
AOCI Attributable to Parent [Member]
Balance	(2,058)	936	3,020	(8,506)
Unrealized holding gain (loss) on available for sale securities, net of tax	(3,403)	2,256	(8,477)	11,763
Reclassification adjustment, net of tax		(11)	(4)	(76)
Balance	$ (5,461)	$ 3,181	$ (5,461)	$ 3,181

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details