Note 13 - Stock Option Plan (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Number of options			Weighted average exercise price		Weighted average remaining contractual term (in years)		Aggregate intrinsic value
Outstanding at December 31, 2012		128,225		$	22.72
Exercised		(29,825	)		20.23
Forfeited		(2,600	)		19.79
Granted		20,000			23.20
Outstanding at December 31, 2013		115,800			23.51
Exercised		(20,050	)		17.82
Forfeited		(27,375	)		29.66
Granted		20,000			25.16
Outstanding at December 31, 2014		88,375		$	23.27		1.97	$	509
Exercisable at December 31, 2014		38,700		$	23.29		0.54	$	248

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]

	Options outstanding		Exercise price		Remaining life (in years)		Options exercisable		Exercise price
		9,600	$	17.25		0.13		9,600	$	17.25
		2,000		19.76		0.69		2,000		19.76
		12,550		20.00		1.07		12,550		20.00
		16,175		21.35		2.07		-		-
		2,500		22.11		1.66		2,500		22.11
		16,850		23.20		3.06		-		-
		16,650		25.16		4.08		-		-
		12,050		32.35		0.05		12,050		32.35
Outstanding at December 31, 2014		88,375	$	23.27		1.97		38,700	$	23.29

Schedule of Tax Benefits and Intrinsic Value Related to Exercisesd Stock Options [Table Text Block]

	2014		2013
Tax benefits related to stock options exercised	$	29	$	2
Intrinsic value of stock options exercised		161		91