Note 8 - Unrealized Losses On Securities - Schedule of Gross Unrealized Losses and Fair Value (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Jun. 30, 2021
Investment securities, less than twelve months, fair value		$ 96,850	$ 54,789
Investment securities, less than twelve months, gross unrealized losses		(476)	(76)
Investment securities, twelve months or greater, fair value		7,738	10,407
Investment securities, twelve months or greater, gross unrealized losses		(81)	(98)
Investment securities, total, fair value		104,588	65,196
Investment securities, total, gross unrealized losses		(557)	(174)
US Government Corporations and Agencies Securities [Member]
Investment securities, less than twelve months, fair value		10,880	3,214
Investment securities, less than twelve months, gross unrealized losses		(72)	(1)
Investment securities, twelve months or greater, fair value		0	0
Investment securities, twelve months or greater, gross unrealized losses		0	0
Investment securities, total, fair value		10,880	3,214
Investment securities, total, gross unrealized losses		(72)	(1)
Corporate Debt Securities [Member]
Investment securities, less than twelve months, fair value		37,074	17,111
Investment securities, less than twelve months, gross unrealized losses		(154)	(7)
Investment securities, twelve months or greater, fair value		0	0
Investment securities, twelve months or greater, gross unrealized losses		0	0
Investment securities, total, fair value		37,074	17,111
Investment securities, total, gross unrealized losses		(154)	(7)
Debt Security, Corporate, Non-US [Member]
Investment securities, less than twelve months, fair value	[1]	14,330	10,929
Investment securities, less than twelve months, gross unrealized losses	[1]	(72)	(21)
Investment securities, twelve months or greater, fair value	[1]	0	0
Investment securities, twelve months or greater, gross unrealized losses	[1]	0	0
Investment securities, total, fair value	[1]	14,330	10,929
Investment securities, total, gross unrealized losses	[1]	(72)	(21)
US States and Political Subdivisions Debt Securities [Member]
Investment securities, less than twelve months, fair value		461	725
Investment securities, less than twelve months, gross unrealized losses		(8)	(5)
Investment securities, twelve months or greater, fair value		250	0
Investment securities, twelve months or greater, gross unrealized losses		(5)	0
Investment securities, total, fair value		711	725
Investment securities, total, gross unrealized losses		(13)	(5)
Collateralized Mortgage Backed Securities [Member]
Investment securities, less than twelve months, fair value		34,105	22,810
Investment securities, less than twelve months, gross unrealized losses		(170)	(42)
Investment securities, twelve months or greater, fair value		7,488	10,407
Investment securities, twelve months or greater, gross unrealized losses		(76)	(98)
Investment securities, total, fair value		41,593	33,217
Investment securities, total, gross unrealized losses		$ (246)	$ (140)

[1] U.S. dollar denominated investment-grade corporate bonds of large foreign corporate issuers.