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

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

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

Buildings and improvements (in years)	35	-	40
Furniture and fixtures and vehicles (in years)	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, 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	%	$	35,105		6.0	%	$	46,806		8.0	%
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	%

											To Be Well Capitalized
						For Capital					Under Prompt Corrective
	Actual					Adequacy Purposes					Action Provisions
	Amount		Ratio			Amount		Ratio			Amount		Ratio
As of December 31, 2014
Tier 1 (core) capital, and ratio to adjusted total assets
Company	$	76,927		12.3	%	$	25,020		4.0	%		n/a		n/a
Bank	$	72,076		11.5	%	$	24,966		4.0	%	$	31,208		5.0	%
Tier 1 (core) capital, and ratio to risk-weighted assets
Company	$	76,927		14.7	%	$	20,928		4.0	%		n/a		n/a
Bank	$	72,076		13.8	%	$	20,914		4.0	%	$	31,371		6.0	%
Total risk-based capital, and ratio to risk-weighted assets
Company	$	83,463		16.0	%	$	41,856		8.0	%		n/a		n/a
Bank	$	78,612		15.0	%	$	41,828		8.0	%	$	52,285		10.0	%

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

	Year Ended		Year Ended		Year Ended
	December 31, 2015		December 31, 2014		December 31, 2013
Net income available to common shareholders	$	5,716,767	$	5,425,486	$	4,445,187
Weighted average common shares outstanding		4,333,418		4,006,461		2,733,969
Effect of dilutive securities		55,931		68,040		79,646
Weighted average diluted shares outstanding		4,389,349		4,074,501		2,813,615
Basic income per common share	$	1.32	$	1.35	$	1.63
Diluted income per common share	$	1.30	$	1.33	$	1.58