Note 5 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

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

Risk-free interest rates	0.44	%
Expected life (in years)	2.8
Dividend yield	0.63	%
Expected volatility (weighted average)	28.14	%

Risk-free interest rates	0.44%	-	0.28%
Expected life (in years)	2	-	2.8
Dividend yield		0.64%
Expected volatility (weighted average)	28.5%	-	35.2%