Note 10 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2022		Sep. 30, 2021
Balance	$ 56,496		$ 54,324
Balance	55,667		56,061
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	4,276		6,564
Other comprehensive loss before reclassifications	(152)		(186)
Tax effect	32		39
Amount reclassified from AOCI	(469)		(602)
Tax effect	98		126
Net other comprehensive loss	(491)		(623)
Balance	3,785		5,941
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	0	[1]	23
Other comprehensive loss before reclassifications	0		(12)
Tax effect	0	[1]	0
Amount reclassified from AOCI	0	[1]	0
Tax effect	0	[1]	0
Net other comprehensive loss	0		(12)
Balance	0	[1]	11
AOCI Attributable to Parent [Member]
Balance	4,276		6,587
Other comprehensive loss before reclassifications	(152)		(198)
Tax effect	32		39
Amount reclassified from AOCI	(469)		(602)
Tax effect	98		126
Net other comprehensive loss	(491)		(635)
Balance	$ 3,785		$ 5,952

[1] Amounts include no tax expense or benefit.