Note 12 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2024	Mar. 31, 2023
Balance	$ 50,890	$ 50,701	$ 52,196	$ 51,925	$ 52,896	$ 53,785	$ 52,196	$ 53,785
Net other comprehensive income (loss)	(132)	(171)	(214)	(231)	(1,248)	(486)	(517)	(1,965)
Balance	49,846	$ 50,890	50,701	52,445	$ 51,925	52,896	49,846	52,445
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance			$ 1,348			$ 3,624	1,348	3,624
Other comprehensive income (loss) before reclassifications							251	(1,189)
Tax effect							(52)	250
Amount reclassified from AOCI							(906)	(1,299)
Tax effect							190	273
Net other comprehensive income (loss)							(517)	(1,965)
Balance	$ 831			$ 1,659			$ 831	$ 1,659