Note 12 - 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]

	Nine Months Ended September 30,
	2014			2013
Risk-free interest rate		2.63 - 2.75	%		0.85 - 1.19	%
Expected volatility		98.7 - 100.7	%		83.4 - 97.8	%
Expected life (in years)		10.00			5.25 - 6.0
Expected forfeiture rate		5	%		5 - 7.5	%
Expected dividend yield		0.0	%		0.0	%

Schedule of Shar-based Compensation, Stock Options and Restricted Stock Awards, Activity [Table Text Block]

	Stock Options					Restricted Stock Awards
Equity Awards	Options Outstanding			Weighted Average Exercise Price		Non-vested Restricted Stock Outstanding			Weighted Average Grant Date Fair Value		Weighted Average Contractual Terms of Equity Awards (in years)
Equity awards outstanding at December 31, 2013		861,905		$	12.30		2,109		$	16.28
Equity awards granted		954,200		$	3.54		25,250		$	3.49
Equity awards exercised		-			–		(20,841	)	$	4.82
Equity awards forfeited, cancelled or expired		(67,925	)	$	20.15		–			–
Equity awards outstanding at September 30, 2014		1,748,180		$	7.21		6,518		$	3.38		8.02
Aggregate intrinsic value of outstanding awards at September 30, 2014	$	–				$	22,025
Equity awards exercisable at September 30, 2014		1,008,573		$	9.59							6.72
Aggregate intrinsic value of awards exercisable at September 30, 2014	$	–