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Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Retained Earnings [Member]
Cash dividends on common stock, per share (in dollars per share)	$ 0.14	$ 0.12		$ 0.36
Common Stock [Member] | First National Corporation 2014 Stock Incentive Plan [Member]
Repurchase of common stock shares (in shares)			8,283	2,221
Common Stock [Member]
Issuance of common stock, dividend reinvestment plan, shares (in shares)	2,733	1,894	7,853	6,102
Issuance of common stock, stock incentive plan, shares (in shares)			34,634	14,073
Cash dividends on common stock, per share (in dollars per share)			$ 0.42
Issuance of common stock, stock incentive plan, shares (in shares)	7,500	6,000

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

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Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity.

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