Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]

	2015		2014		2013
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