Note 13 - Regulatory Matters - Schedule of Compliance With Regulatory Capital Requirements Under Banking Regulations (Details) - USD ($)		Jun. 30, 2021	Jun. 30, 2020
Common Equity Tier One Risk Based Capital		$ 64,700	$ 57,600
Common Equity Tier One Risk Based Capital to Risk Weighted Assets		11.87%	11.55%
Common Equity Tier One Risk Based Capital Required for Capital Adequacy	[1]	$ 24,500	$ 22,400
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		$ 35,400	$ 32,400
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		$ 64,700	$ 57,600
Tier 1 capital to risk weighted assets Bank		0.1187	0.1155
Tier One Risk Based Capital Required for Capital Adequacy	[1]	$ 32,700	$ 29,900
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	[1]	0.06	0.06
Tier One Risk Based Capital Required to be Well Capitalized		$ 43,600	$ 39,900
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets		0.08	0.08
Capital		$ 71,200	$ 63,200
Capital to Risk Weighted Assets		0.1306	0.1269
Capital Required for Capital Adequacy	[1]	$ 43,600	$ 39,900
Capital Required for Capital Adequacy to Risk Weighted Assets	[1]	0.08	0.08
Capital Required to be Well Capitalized		$ 54,500	$ 49,800
Capital Required to be Well Capitalized to Risk Weighted Assets		0.1	0.1
Tier One Leverage Capital		$ 64,700	$ 57,600
Tier One Leverage Capital to Average Assets		0.0783	0.0804
Tier One Leverage Capital Required for Capital Adequacy	[1]	$ 33,100	$ 28,700
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	[1]	0.04	0.04
Tier One Leverage Capital Required to be Well Capitalized		$ 41,300	$ 35,800
Tier One Leverage Capital Required to be Well Capitalized to Average Assets		0.05	0.05

[1] These amounts exclude the capital conservation buffer.