Note 4 - Investment Securities (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

Available-for-Sale	2019
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
Debt securities:
U.S. Government-sponsored agencies collateralized by mortgage obligations-residential	$	123,940,000	$	1,924,000	$	(186,000	)	$	125,678,000
Obligations of states and political subdivisions		32,470,000		1,201,000		(29,000	)		33,642,000
	$	156,410,000	$	3,125,000	$	(215,000	)	$	159,320,000

Available-for-Sale	2018
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
Debt securities:
U.S. Government-sponsored agencies collateralized by mortgage obligations-residential	$	135,059,000	$	240,000	$	(2,621,000	)	$	132,678,000
Obligations of states and political subdivisions		39,311,000		121,000		(603,000	)		38,829,000
	$	174,370,000	$	361,000	$	(3,224,000	)	$	171,507,000

Schedule of Unrealized Loss on Investments [Table Text Block]

December 31, 2019
	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Debt securities:
U.S. Government agencies collateralized by mortgage obligations-residential	$	10,319,000	$	31,000	$	19,733,000	$	155,000	$	30,052,000	$	186,000
Obligations of states and political subdivisions		2,965,000		29,000		-		-		2,965,000		29,000
	$	13,284,000	$	60,000	$	19,733,000	$	155,000	$	33,017,000	$	215,000

December 31, 2018
	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Debt securities:
U.S. Government agencies collateralized by mortgage obligations-residential	$	26,478,000	$	269,000	$	77,476,000	$	2,352,000	$	103,954,000	$	2,621,000
Obligations of states and political subdivisions		19,270,000		284,000		5,672,000		319,000		24,942,000		603,000
	$	45,748,000	$	553,000	$	83,148,000	$	2,671,000	$	128,896,000	$	3,224,000

Investments Classified by Contractual Maturity Date [Table Text Block]

	Amortized		Estimated Fair
	Cost		Value
After one year through five years	$	3,142,000	$	3,243,000
After five years through ten years		6,178,000		6,370,000
After ten years		23,150,000		24,029,000
Investment securities not due at a single maturity date:
Government-sponsored mortgage-backed securities		123,940,000		125,678,000
	$	156,410,000	$	159,320,000