Note 6 - Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2013

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

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

Risk-free interest rates	0.57	%
Expected lives (in years)	4.25
Dividend yield	0.80	%
Expected volatility	35.76	%
Forfeiture rate	0.00	%

Risk-free interest rates	0.77	%
Expected lives (in years)	4.625
Dividend yield	0.70	%
Expected volatility	38.13	%
Forfeiture rate	6.37	%