Note 13 - Regulatory Matters - Schedule of Compliance With Regulatory Capital Requirements Under Banking Regulations (Details) - USD ($)		Jun. 30, 2022	Jun. 30, 2021
Common Equity Tier One Risk Based Capital		$ 74,100	$ 64,700
Common Equity Tier One Risk Based Capital to Risk Weighted Assets		11.39%	11.87%
Common Equity Tier One Risk Based Capital Required for Capital Adequacy	[1]	$ 29,300	$ 24,500
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	[1]	4.50%	4.50%
Common Equity Tier One Risk Based Capital Required to be Well Capitalized		$ 42,300	$ 35,400
Common Equity Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets		6.50%	6.50%
Tier One Risk Based Capital		$ 74,100	$ 64,700
Tier 1 capital to risk weighted assets Bank		0.1139	0.1187
Tier One Risk Based Capital Required for Capital Adequacy	[1]	$ 39,000.0	$ 32,700
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	[1]	0.0600	0.0600
Tier One Risk Based Capital Required to be Well Capitalized		$ 52,100	$ 43,600
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets		0.0800	0.0800
Capital		$ 81,300	$ 71,200
Capital to Risk Weighted Assets		0.1249	0.1306
Capital Required for Capital Adequacy	[1]	$ 52,100	$ 43,600
Capital Required for Capital Adequacy to Risk Weighted Assets	[1]	0.0800	0.0800
Capital Required to be Well Capitalized		$ 65,100	$ 54,500
Capital Required to be Well Capitalized to Risk Weighted Assets		0.1000	0.1000
Tier One Leverage Capital		$ 74,100	$ 64,700
Tier One Leverage Capital to Average Assets		0.0739	0.0783
Tier One Leverage Capital Required for Capital Adequacy	[1]	$ 40,100	$ 33,100
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	[1]	0.0400	0.0400
Tier One Leverage Capital Required to be Well Capitalized		$ 50,100	$ 41,300
Tier One Leverage Capital Required to be Well Capitalized to Average Assets		0.0500	0.0500

[1] These amounts exclude the capital conservation buffer.