Note 2 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2014

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

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

	2014			2013
Risk-free interest rate		1.45%-1.64	%		0.76	%
Expected volatility		83%-102	%		106	%
Dividend yield		0	%		0	%
Expected option term (years)		5			5

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Options		Weighted average ExercisePrice		Weighted average remaining contractualterm (in years)		Aggregate Intrinsic Value
Outstanding at beginning of period	461,919		$	9.80
Granted	43,064			14.67
Exercised	(130,000	)		9.00
Outstanding and vested at end of period	374,983		$	10.64		2.31	$	432,747