Note 2 - Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

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

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

	Number of Options			Weighted Average Option Price
Balance, December 31, 2012		2,052,783		$	4.06
Granted		128,500			5.15
Exercised		(15,000	)		1.71
Cancelled		(397,554	)		4.71
Balance, September 30, 2013		1,768,729		$	4.02

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

	Three months ended September 30,						Nine months ended September 30,
	2013			2012			2013			2012
Weighted average risk free interest rates		2.63	%		1.53	%		2.58	%		1.93	%
Weighted average life (in years)		10			10			10			10
Volatility		68.13	%		66.00	%		67.97	%		65.90	%
Expected dividend yield		-			-			-			-
Weighted average grant-date fair value per share of options granted	$	4.06		$	3.18		$	3.87		$	3.55

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Restricted Stock Shares			Weighted Average Grant Date Value
Nonvested restricted stock at December 31, 2012		112,015		$	3.17
Granted		-			-
Vested		(40,195	)		3.08
Cancelled/Forfeited		(10,164	)		3.35
Nonvested restricted stock at September 30, 2013		61,656		$	3.21