Note 3 - Loans and Allowance for Credit Losses - Major Classifications (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024
Gross loans	$ 904,057		$ 813,458
Less allowance for credit losses	(8,868)	$ (8,777)	(8,470)	$ (8,047)	$ (7,844)	$ (7,930)
Net loans	895,189		804,988
Commercial and Industrial [Member]
Gross loans	153,408		113,513
Less allowance for credit losses	(1,531)	(1,299)	(1,249)	(1,249)	(1,076)	(1,144)
Commercial Real Estate Portfolio Segment [Member]
Less allowance for credit losses	(3,566)	(3,650)	(3,446)	(3,308)	(3,478)	(3,650)
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loans [Member]
Gross loans	166,698		162,674
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Loans [Member]
Gross loans	183,035		163,768
Farmland [Member]
Gross loans	47,848		42,050
Less allowance for credit losses	(106)	(129)	(118)	(105)	(93)	(89)
Land Development [Member]
Gross loans	17,788		17,535
Less allowance for credit losses	(213)	(242)	(266)	(198)	(178)	(174)
Residential Portfolio Segment [Member]
Gross loans	207,548		201,602
Less allowance for credit losses	(1,874)	(2,013)	(2,010)	(1,994)	(2,086)	(2,018)
Consumer Portfolio Segment [Member]
Gross loans	127,732		112,316
Less allowance for credit losses	$ (1,578)	$ (1,444)	$ (1,381)	$ (1,193)	$ (933)	$ (855)