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Note 17 - Acquisition (Details Textual) $ in Thousands, shares in Millions		9 Months Ended
	Feb. 18, 2021 USD ($)	Dec. 31, 2021 USD ($) shares	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	[1]
Assets, Total			$ 1,028,130	$ 950,932
Loans and Leases Receivable, Net Amount, Total			630,716	622,429
Deposits, Total			916,057	$ 842,461
The Bank of Fincastle [Member]
Assets, Total			272,100
Loans and Leases Receivable, Net Amount, Total			197,800
Deposits, Total			$ 239,700
The Bank of Fincastle [Member]
Business Combination, Consideration Transferred, Total	$ 31,600
Number of Retail Bank Offices Acquired	6
The Bank of Fincastle [Member] | Forecast [Member]
Payments to Acquire Businesses, Gross		$ 6,700
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares		1.3
[1] Derived from audited consolidated financial statements.

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The number of retail bank offices acquired by the entity during the period.

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Number of shares of equity interests issued or issuable to acquire entity.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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