Note 7 - Capital Standards (Details Textual)	Mar. 31, 2022	Dec. 31, 2021
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum	0.065	0.0650
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	0.08	0.0800
Capital Required to be Well Capitalized to Risk Weighted Assets	0.10	0.1000
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	0.05	0.0500

Ratio of minimum Common Equity Tier 1 risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826

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Ratio of minimum total risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.

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Ratio of minimum Tier 1 leverage capital to average assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.

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