Note 1 - Summary of Significant Accounting Policies (Details) - Weighted Average Number of Shares - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Weighted Average Number of Shares [Abstract]
Average number of common shares outstanding	6,953,849	6,948,789	6,947,974
Effect of dilutive options	3,245	10,345	20,419
Average number of common shares outstanding used to calculate diluted earnings per common share	6,957,094	6,959,134	6,968,393