Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Property, Plant, and Equipment, Useful Lives [Table Text Block]

	Years
Buildings and improvements	35	-	40
Furniture and fixtures and vehicles	3	-	10

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]

											To Be Well Capitalized
						For Capital					Under Prompt Corrective
	Actual					Adequacy Purposes					Action Provisions
	Amount		Ratio			Amount		Ratio			Amount		Ratio
As of December 31, 2019
Tier 1 (core) capital, and ratio to adjusted total assets Bank	$	104,480		10.5	%	$	40,083		4.0	%	$	50,103		5.0	%
Tier 1 (core) capital, and ratio to risk-weighted assets Bank	$	104,480		12.4	%	$	50,727		6.0	%	$	67,636		8.0	%
Total risk-based capital, and ratio to risk-weighted assets Bank	$	112,088		13.3	%	$	67,636		8.0	%	$	84,545		10.0	%
Common equity tier 1 capital ratio to risk-weighted assets Bank	$	104,480		12.4	%	$	38,045		4.5	%	$	54,954		6.5	%

											To Be Well Capitalized
						For Capital					Under Prompt Corrective
	Actual					Adequacy Purposes					Action Provisions
	Amount		Ratio			Amount		Ratio			Amount		Ratio
As of December 31, 2018
Tier 1 (core) capital, and ratio to adjusted total assets Bank	$	99,540		10.6	%	$	37,966		4.0	%	$	47,458		5.0	%
Tier 1 (core) capital, and ratio to risk-weighted assets Bank	$	99,540		11.7	%	$	51,041		6.0	%	$	68,055		8.0	%
Total risk-based capital, and ratio to risk-weighted assets Bank	$	107,535		12.6	%	$	68,055		8.0	%	$	85,068		10.0	%
Common equity tier 1 capital ratio to risk-weighted assets Bank	$	99,540		11.7	%	$	38,281		4.5	%	$	55,294		6.5	%

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Year Ended		Year Ended		Year Ended
	December 31, 2019		December 31, 2018		December 31, 2017
Net income available to common shareholders	$	9,415,090	$	7,331,879	$	5,157,664
Weighted average common shares outstanding		4,405,575		4,410,422		4,372,262
Effect of dilutive securities		57,984		72,261		68,685
Weighted average diluted shares outstanding		4,463,559		4,482,683		4,440,947
Basic income per common share	$	2.14	$	1.66	$	1.18
Diluted income per common share	$	2.11	$	1.64	$	1.16