Note 3 - Stock-based Compensation and Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2014

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

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Three months ended March 31,	2014			2013
Risk free interest rate		0.69	%		0.35	%
Dividend yield		4.28			4.26
Volatility		28.12			34.10
Expected life (years)		5.00			5.00

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, 2013		115,800			23.51
Granted		20,000			25.16
Exercised		(12,500	)		17.26
Forfeited		-			-
Outstanding at March 31, 2014		123,300		$	24.41		2.36	$	576
Exercisable at March 31, 2014		61,500		$	25.61		0.94	$	287