Note 9 - Schedule of Short-Term Borrowings (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Short-term Borrowings [Line Items]
Balance		$ 94,094	$ 161,327
Securities Sold under Agreements to Repurchase [Member]
Short-term Borrowings [Line Items]
Balance	[1]	44,094	69,309
Maximum indebtedness at any month end	[1]	69,343	71,847
Daily average indebtedness outstanding	[1]	$ 53,154	$ 68,650
Average rate paid for the year	[1]	1.39%	0.50%
Average rate on period-end borrowings	[1]	4.59%	1.82%
Other Short Term Debt [Member]
Short-term Borrowings [Line Items]
Balance	[2]	$ 50,000	$ 92,018
Maximum indebtedness at any month end	[2]	136,799	92,018
Daily average indebtedness outstanding	[2]	$ 55,708	$ 17,226
Average rate paid for the year	[2]	4.55%	3.01%
Average rate on period-end borrowings	[2]	4.39%	4.51%

[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 $72,012,000 and $92,158,000 and a fair value of $61,650,000 and $79,014,000 and at December 31, 2023 and 2022 respectively. These securities are held in safekeeping at the Federal Reserve Bank of Boston.

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