Note 6 - Equity Incentive Plan (Tables)

3 Months Ended

Mar. 31, 2016

Notes Tables

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

	Three Months Ended March 31,
	2016			2015
Risk free interest rate	1.16%	-	1.40%		1.15	%
Expected volatility	50.84%	-	51.61%		54.65	%
Expected life (years)		4.5			4.5
Expected dividend yield		0.00%			0.00	%