Note 17 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
U.S. Government agency debt obligations	$	390,371,000	$	0	$	390,371,000	$	0
Mortgage-backed securities		41,803,000		0		41,803,000		0
Municipal general obligation bonds		137,594,000		0		136,917,000		677,000
Municipal revenue bonds		22,475,000		0		22,475,000		0
Other investments		500,000		0		500,000		0
Interest rate swaps		4,609,000		0		4,609,000		0
Total	$	597,352,000	$	0	$	596,675,000	$	677,000

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
U.S. Government agency debt obligations	$	242,141,000	$	0	$	242,141,000	$	0
Mortgage-backed securities		24,890,000		0		24,890,000		0
Municipal general obligation bonds		107,824,000		0		107,058,000		766,000
Municipal revenue bonds		11,992,000		0		11,992,000		0
Other investments		500,000		0		500,000		0
Interest rate swaps		1,003,000		0		1,003,000		0
Total	$	388,350,000	$	0	$	387,584,000	$	766,000

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]

			Quoted Prices
			in Active		Significant
			Markets for		Other		Significant
			Identical		Observable		Unobservable
			Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Impaired loans	$	3,807,000	$	0	$	0	$	3,807,000
Foreclosed assets		0		0		0		0
Total	$	3,807,000	$	0	$	0	$	3,087,000

			Quoted Prices
			in Active		Significant
			Markets for		Other		Significant
			Identical		Observable		Unobservable
			Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Impaired loans	$	2,880,000	$	0	$	0	$	2,880,000
Foreclosed assets		701,000		0		0		701,000
Total	$	3,581,000	$	0	$	0	$	3,581,000