Note 13 - Regulatory Matters - Schedule of Compliance With Regulatory Capital Requirements Under Banking Regulations (Details) - USD ($)		Jun. 30, 2020		Jun. 30, 2019
Common Equity Tier One Risk Based Capital		$ 57,600		$ 48,000
Common Equity Tier One Risk Based Capital to Risk Weighted Assets		11.55%		11.68%
Common Equity Tier One Risk Based Capital Required for Capital Adequacy		$ 22,400	[1]	$ 18,500
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets		4.50%	[1]	4.50%
Common Equity Tier One Risk Based Capital Required to be Well Capitalized		$ 32,400		$ 26,700
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		$ 57,600		$ 48,000
Tier 1 capital to risk weighted assets Bank		0.1155		0.1168
Tier One Risk Based Capital Required for Capital Adequacy	[1]	$ 29,900		$ 24,600
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		$ 39,900		$ 32,900
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets		0.08		0.08
Capital		$ 63,200		$ 51,800
Capital to Risk Weighted Assets		0.1269		0.126
Capital Required for Capital Adequacy	[1]	$ 39,900		$ 32,900
Capital Required for Capital Adequacy to Risk Weighted Assets	[1]	0.08		0.08
Capital Required to be Well Capitalized		$ 49,800		$ 41,100
Capital Required to be Well Capitalized to Risk Weighted Assets		0.1		0.1
Tier One Leverage Capital		$ 57,600		$ 48,000
Tier One Leverage Capital to Average Assets		0.0804		0.0888
Tier One Leverage Capital Required for Capital Adequacy	[1]	$ 28,700		$ 21,600
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		$ 35,800		$ 27,000
Tier One Leverage Capital Required to be Well Capitalized to Average Assets		0.05		0.05

[1] These amounts exclude the capital conservation buffer.