Note 5 - Fair Value - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021
Securities, available-for-sale	$ 269,836	$ 207,760
Equity securities	432	424
US Treasury Securities [Member]
Securities, available-for-sale	8,859
US Government-sponsored Enterprises Debt Securities [Member]
Securities, available-for-sale	19,798	15,033
US States and Political Subdivisions Debt Securities [Member]
Securities, available-for-sale	88,965	76,499
Residential Mortgage Backed Securities [Member]
Securities, available-for-sale	103,900	90,517
Commercial Mortgage Backed Securities [Member]
Securities, available-for-sale	8,604	8,845
Other Debt Obligations [Member]
Securities, available-for-sale	16,396	492
Fair Value, Recurring [Member]
Equity securities	432	424
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Equity securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Equity securities	432	424
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Equity securities	0	0
Fair Value, Recurring [Member] | US Treasury Securities [Member]
Securities, available-for-sale	8,859
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale	0
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	8,859
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale	0
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Securities, available-for-sale	19,798	15,033
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	19,798	15,033
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Securities, available-for-sale	88,965	76,499
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	88,965	76,499
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | Residential Mortgage Backed Securities [Member]
Securities, available-for-sale	103,900	90,517
Fair Value, Recurring [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	103,900	90,517
Fair Value, Recurring [Member] | Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | Commercial Mortgage Backed Securities [Member]
Securities, available-for-sale	8,604	8,845
Fair Value, Recurring [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	8,604	8,845
Fair Value, Recurring [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | Collateralized Debt Obligations [Member]
Securities, available-for-sale	23,314	16,374
Fair Value, Recurring [Member] | Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	23,314	16,374
Fair Value, Recurring [Member] | Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | Other Debt Obligations [Member]
Securities, available-for-sale	16,396	492
Fair Value, Recurring [Member] | Other Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | Other Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	16,396	492
Fair Value, Recurring [Member] | Other Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale	$ 0	$ 0