Note 2 - Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

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, 2013		2,187,019		$	4.11
Granted		116,000			5.75
Exercised		(625	)		4.37
Cancelled		(362,016	)		6.34
Balance, June 30, 2014		1,940,378		$	3.79

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

	Three months ended June 30,						Six months ended June 30,
	2014			2013			2014			2013
Risk free interest rate range		2.70	%		1.86	%		2.70	%	1.86 – 2.04		%
Weighted average life (in years)		10			10			10			10
Weighted average volatility		65.30	%		66.10	%		65.30	%		66.23	%
Volatility range		65.30	%		66.10	%		65.30	%	66.10 – 66.28		%
Expected dividend yield		-			-			-			-
Weighted average grant-date fair value per share of options granted	$	4.31		$	1.80		$	4.31		$	1.80

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

	Restricted Stock Shares			Weighted Average Grant Date Value
Nonvested restricted stock at December 31, 2013		61,656		$	3.21
Granted		-			-
Vested		(30,836	)		3.21
Cancelled/Forfeited		-			-
Nonvested restricted stock at June 30, 2014		30,820		$	3.21