Note 6 - Equity Incentive Plan (Tables)

6 Months Ended

Jun. 30, 2015

Notes Tables

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

	Six Months Ended June 30,
	2015			2014
Risk free interest rate	1.15%	-	1.46%	1.16%	-	1.33%
Expected volatility	53.15%	-	54.65%		53.28%
Expected life (years)		4.5			4
Expected dividend yield		0.00%			0.00%