Note 16 - Regulatory Matters (Details Textual)	Dec. 31, 2019
Banking Regulation, Capital Conservation Buffer, Common Equity Tier One Risk-Based Capital, Actual	2.50
Banking Regulation, Capital Conservation Buffer, Total Risk-Based Capital, Actual	2.50
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum	2.50

Minimum capital conservation buffer percentage required to avoid restriction on payout amount of eligible retained income as defined by regulatory framework.

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 http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826

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- Definition

Capital conservation buffer percentage calculated as Common Equity Tier 1 risk-based capital ratio after deduction of minimum Common Equity Tier 1 risk-based capital ratio as defined by regulatory framework.

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- Definition

Capital conservation buffer percentage calculated as total risk-based capital ratio after deduction of minimum total risk-based capital ratio as defined by regulatory framework.

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