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Note 15 - Revenue from Contracts with Customers - Noninterest Income (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Deposit service charges and fees										$ 3,196	$ 3,844
Loan servicing fees	[1]									552	451
Mortgage brokerage and banking fees	[1]									98	149
Gain on sale of equity securities	[1]									0	295
Loss on disposal of other assets										(5)	(44)
Earnings on bank-owned life insurance	[1]									70	136
Other	[1]									494	497
Total noninterest income		$ 1,541	$ 1,264	$ 1,163	$ 1,398	$ 1,648	$ 1,474	$ 1,426	$ 1,624	5,366	6,172
Deposit Account [Member]
Deposit service charges and fees										3,196	3,844
Bank Servicing [Member]
Deposit service charges and fees										$ 961	$ 844
[1] Not within the scope of ASC 606

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Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies.

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Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of fees and commissions from banking, advisory, brokerage, and securities underwriting activities. Activities include, but are not limited to, underwriting securities, private placements of securities, investment advisory and management services, merger and acquisition services, sale and servicing of mutual funds, and other related consulting fees.

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The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

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Amount of revenue earned, classified as other, excluding interest income.

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