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Note 17 - Selected Quarterly Financial Data (Unaudited) (Details Textual) - USD ($)	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
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total	$ 2,445,000	$ 1,948,000	$ 2,352,000	$ 2,418,000	$ 3,390,000	$ 3,924,000	$ 807,000	$ 3,551,000	$ 9,163,000	$ 11,672,000
Earnings Per Share, Basic and Diluted, Total (in dollars per share)	$ 0.17	$ 0.13	$ 0.16	$ 0.16	$ 0.22	$ 0.26	$ 0.05	$ 0.22	$ 0.61	$ 0.75
Interest Income (Expense), Net, Total	$ 11,596,000	$ 10,997,000	$ 11,325,000	$ 11,969,000	$ 12,627,000	$ 13,242,000	$ 13,103,000	$ 13,219,000	$ 45,887,000	$ 52,191,000
Noninterest Income, Net Recovery of Nonperforming Loans Expenses					$ 24,000
Interest and Fee Income, Loans and Leases, Total	605,000								$ 50,467,000	$ 60,568,000
Fee Income, Commercial Credit Facilities	255,000
Fee Income, Paycheck Protection Program	$ 162,000

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The amount of income from commercial credit facilities fees during the period.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.

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