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Note 9 - Borrowings (Details Textual) - USD ($)	1 Months Ended
	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds		$ 85,600,000
Term Loan [Member]
Debt Instrument, Face Amount	$ 10,000,000
Debt Instrument, Interest Rate, Effective Percentage		3.00%
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	2.50%
Term Loan [Member] | Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	3.00%
Agricultural and Residential Real Estate [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged		$ 158,200,000	$ 200,100,000

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB).

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