Note 5 - Fair Value - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Jun. 30, 2022
Securities, available-for-sale	$ 287,142	$ 296,347
Equity securities	367	400
US Treasury Securities [Member]
Securities, available-for-sale	8,321	8,447
US Government-sponsored Enterprises Debt Securities [Member]
Securities, available-for-sale	24,032	26,265
US States and Political Subdivisions Debt Securities [Member]
Securities, available-for-sale	95,935	97,357
Residential Mortgage-Backed Securities [Member]
Securities, available-for-sale	93,238	102,183
Commercial Mortgage-Backed Securities [Member]
Securities, available-for-sale	6,753	7,301
Other Debt Obligations [Member]
Securities, available-for-sale	15,779	16,615
Fair Value, Recurring [Member]
Equity securities	367	400
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	367	400
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	8,321	8,447
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	8,321	8,447
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Securities, available-for-sale	24,032	26,265
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	24,032	26,265
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	95,935	97,357
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	95,935	97,357
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	93,238	102,183
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	93,238	102,183
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	6,753	7,301
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	6,753	7,301
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] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]
Securities, available-for-sale	43,084	38,179
Fair Value, Recurring [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale	0	0
Fair Value, Recurring [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	43,084	38,179
Fair Value, Recurring [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [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	15,779	16,615
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	15,779	16,615
Fair Value, Recurring [Member] | Other Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale	$ 0	$ 0