Note 2 - Securities (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Available-for-sale Securities [Table Text Block]

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
2020
U.S. Government agency debt obligations	$	242,522,000	$	516,000	$	(897,000	)	$	242,141,000
Mortgage-backed securities		23,869,000		1,021,000		0			24,890,000
Municipal general obligation bonds		101,991,000		5,833,000		0			107,824,000
Municipal revenue bonds		11,521,000		473,000		(2,000	)		11,992,000
Other investments		500,000		0		0			500,000
	$	380,403,000	$	7,843,000	$	(899,000	)	$	387,347,000
2019
U.S. Government agency debt obligations	$	185,103,000	$	2,449,000	$	(1,142,000	)	$	186,410,000
Mortgage-backed securities		41,998,000		554,000		(82,000	)		42,470,000
Municipal general obligation bonds		98,245,000		2,864,000		(30,000	)		101,079,000
Municipal revenue bonds		4,133,000		63,000		0			4,196,000
Other investments		500,000		0		0			500,000
	$	329,979,000	$	5,930,000	$	(1,254,000	)	$	334,655,000

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

	Less than 12 Months				12 Months or More				Total
Description of Securities	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
2020
U.S. Government agency debt obligations	$	118,650,000	$	897,000	$	0	$	0	$	118,650,000	$	897,000
Mortgage-backed securities		0		0		0		0		0		0
Municipal general obligation bonds		0		0		0		0		0		0
Municipal revenue bonds		423,000		2,000		0		0		423,000		2,000
Other investments		0		0		0		0		0		0
	$	119,073,000	$	899,000	$	0	$	0	$	119,073,000	$	899,000
2019
U.S. Government agency debt obligations	$	25,650,000	$	349,000	$	73,913,000	$	793,000	$	99,563,000	$	1,142,000
Mortgage-backed securities		2,838,000		28,000		10,423,000		54,000		13,261,000		82,000
Municipal general obligation bonds		3,755,000		18,000		994,000		12,000		4,749,000		30,000
Municipal revenue bonds		0		0		0		0		0		0
Other investments		0		0		0		0		0		0
	$	32,243,000	$	395,000	$	85,330,000	$	859,000	$	117,573,000	$	1,254,000

Investments Classified by Contractual Maturity Date [Table Text Block]

	Weighted Average Yield		Amortized Cost		Fair Value
Due in one year or less		2.52%	$	5,906,000	$	5,939,000
Due from one to five years		1.16		93,320,000		94,474,000
Due from five to ten years		1.67		176,848,000		180,541,000
Due after ten years		2.07		79,960,000		81,003,000
Mortgage-backed securities		2.10		23,869,000		24,890,000
Other investments		4.13		500,000		500,000
		1.67%	$	380,403,000	$	387,347,000