Note 9 - Schedule of Short-Term Borrowings (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Short-term Borrowings [Line Items]
Balance		$ 55,931	$ 50,872
Securities Sold under Agreements to Repurchase [Member]
Short-term Borrowings [Line Items]
Balance	[1]	44,114	47,007
Maximum indebtedness at any month end	[1]	44,114	47,007
Daily average indebtedness outstanding	[1]	$ 40,220	$ 38,172
Average rate paid for the year	[1]	0.70%	0.55%
Average rate on period-end borrowings	[1]	0.62%	0.67%
Other Short Term Debt [Member]
Short-term Borrowings [Line Items]
Balance	[2]	$ 11,817	$ 3,865
Maximum indebtedness at any month end	[2]	33,260	46,451
Daily average indebtedness outstanding	[2]	$ 16,761	$ 22,767
Average rate paid for the year	[2]	2.49%	2.03%
Average rate on period-end borrowings	[2]	1.81%	2.65%

[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 $55,928,000 and $62,445,000 and a fair value of $55,795,000 and $60,408,000 and at December 31, 2019 and 2018, 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.