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

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	(in 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, 2016
Tier 1 (core) capital, and ratio to adjusted total assets Bank	$	85,255		12.5	%	$	27,283		4.0	%	$	34,103		5.0	%
Tier 1 (core) capital, and ratio to risk-weighted assets Bank	$	85,255		14.0	%	$	36,434		6.0	%	$	48,578		8.0	%
Total risk-based capital, and ratio to risk-weighted assets Bank	$	90,997		15.0	%	$	48,578		8.0	%	$	60,723		10.0	%
Common equity tier 1 capital ratio to risk-weighted assets Bank	$	85,255		14.0	%	$	27,325		4.5	%	$	39,470		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, 2015
Tier 1 (core) capital, and ratio to adjusted total assets Bank	$	78,635		12.2	%	$	25,844		4.0	%	$	32,305		5.0	%
Tier 1 (core) capital, and ratio to risk-weighted assets Bank	$	78,635		13.4	%	$	23,403		4.0	%	$	35,105		6.0	%
Total risk-based capital, and ratio to risk-weighted assets Bank	$	84,447		14.4	%	$	46,806		8.0	%	$	58,508		10.0	%
Common equity tier 1 capital ratio to risk-weighted assets Bank	$	78,635		13.4	%	$	26,329		4.5	%	$	38,030		6.5	%

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

	Year Ended		Year Ended		Year Ended
	December 31, 2016		December 31, 2015		December 31, 2014
Net income available to common shareholders	$	5,594,011	$	5,716,767	$	5,425,486
Weighted average common shares outstanding		4,363,949		4,333,418		4,006,461
Effect of dilutive securities		56,299		55,931		68,040
Weighted average diluted shares outstanding		4,420,248		4,389,349		4,074,501
Basic income per common share	$	1.28	$	1.32	$	1.35
Diluted income per common share	$	1.27	$	1.30	$	1.33