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Note 7 - Revenue from Contracts with Customers - Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Noninterest income from contracts with customers within the scope of ASC 606	$ 2,495	$ 2,281
Noninterest income within the scope of other GAAP topics	3,105	1,818
Total noninterest income	5,600	4,099
Service Charges and Fees on Deposit Accounts [Member]
Noninterest income from contracts with customers within the scope of ASC 606	785	1,009
Interchange Income [Member]
Noninterest income from contracts with customers within the scope of ASC 606	1,135	836
Investment Commission Income [Member]
Noninterest income from contracts with customers within the scope of ASC 606	236	119
Trust Fee Income [Member]
Noninterest income from contracts with customers within the scope of ASC 606	173	170
Other Charges and Fees for Customer Services [Member]
Noninterest income from contracts with customers within the scope of ASC 606	$ 166	$ 147

X

- Definition

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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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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