Note 3 - Securities (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)
Available-for-sale Securities Income Tax Provision on Gross Realized Gains		$ 1		$ 1	$ 3
Debt Securities, Available-for-Sale, Restricted	$ 122,812			$ 122,812		$ 96,970
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	281			281
Held-to-Maturity, Securities in Unrealized Loss Positions, Number of Positions	2			2
Equity Securities, FV-NI, Cost	$ 428			$ 428		400
Equity Securities, FV-NI, Total						$ 424
Equity Securities, FV-NI, Unrealized Gain (Loss), Total	0	0		0	$ 0
Proceeds from Sale of Equity Securities, FV-NI	$ 0	$ 0	$ 0	$ 0