Note 2 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Notes Tables

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

	Number of Options			Weighted Average Option Price
Balance, December 31, 2014		1,782,749		$	3.79
Granted		217,000			0.74
Exercised		-			-
Cancelled/Expired		(509,821	)		4.22
Balance, June 30, 2015		1,489,928		$	3.20

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

	Three months ended June 30,				Six months ended June 30,
	2015			2014	2015			2014
Risk free interest rate range	2.19	-	2.37%	2.70%	2.19	-	2.37%	2.70
Weighted average life (in years)		10		10		10		10
Weighted average volatility		74.00%		65.30%		74.00%		65.30
Volatility range	70.35	-	74.37%	65.30%	70.35	-	74.37%	65.30
Expected dividend yield		-		-		-		-
Weighted average grant-date fair value per share of options granted		$0.59		$4.31		$0.59		$4.31

Nonvested Restricted Stock Shares Activity [Table Text Block]

	Restricted Stock Shares			Weighted Average Grant Date Value
Nonvested restricted stock at December 31, 2014		29,155		$	3.29
Granted		-			-
Vested		(29,155	)		3.29
Cancelled/Forfeited		-			-
Nonvested restricted stock at June 30, 2015		-		$	-