Note 2 - Earnings Per Share and Share Repurchase Plan (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:

Year ended December 31,	2017		2016		2015
Numerator for basic and diluted earnings per share - net income	$	8,289	$	8,924	$	8,233
Denominator for basic earnings per share - weighted average shares    outstanding		3,428,970		3,386,766		3,337,505
Effect of dilutive securities - employee stock options		16,841		9,073		13,034
Denominator for diluted earnings per share - adjusted weighted average    shares outstanding		3,445,811		3,395,839		3,350,539
Earnings per share - basic	$	2.42	$	2.64	$	2.47
Earnings per share - diluted	$	2.41	$	2.63	$	2.46