Note 9 - Schedule of Short-Term Borrowings (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Short-term Borrowings [Line Items]
Balance		$ 68,476	$ 58,838
Securities Sold under Agreements to Repurchase [Member]
Short-term Borrowings [Line Items]
Balance	[1]	68,476	58,838
Maximum indebtedness at any month end	[1]	79,257	60,377
Daily average indebtedness outstanding	[1]	$ 71,467	$ 50,007
Average rate paid for the year	[1]	0.36%	0.43%
Average rate on period-end borrowings	[1]	0.34%	0.38%
Other Short Term Debt [Member]
Short-term Borrowings [Line Items]
Balance	[2]	$ 0	$ 0
Maximum indebtedness at any month end	[2]	0	10,845
Daily average indebtedness outstanding	[2]	$ 191	$ 1,738
Average rate paid for the year	[2]	0.31%	1.90%
Average rate on period-end borrowings	[2]	0.00%	0.00%

[1] Securities sold under agreements to repurchase mature overnight. The repurchase agreements were collateralized by U.S. Government mortgage-backed securities and CMOs with an amortized cost of $89,439,000 and $69,793,000 and a fair value of $89,361,000 and $71,295,000 and at December 31, 2021 and 2020 respectively. These securities are held in safekeeping at the Federal Reserve Bank of Boston.

[2] Other short-term borrowings include Federal funds purchased and overnight borrowings from the FHLB.