Note 8 - Fair Value (Details Textual) Pure in Thousands	3 Months Ended
Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Impaired Loans, Fair Value Disclosure	$ 296,000		$ 28,000
Number of Loans Measured for Impairment Using Fair Value of Collateral			0
Provision for Loan and Lease Losses, Total	(335,000)	$ 471,000
Other Real Estate with Valuation Adjustments	0		$ 0
Impaired Loans [Member]
Provision for Loan and Lease Losses, Total	$ 28,000	$ 0

Amount of expense related to estimated loss from loan and lease transactions.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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