Note 11 - Warrants (Tables)

3 Months Ended

Mar. 31, 2014

Warrants [Abstract]

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

Warrants	Number of Warrants Issued		Weighted Average Exercise Price
Warrants outstanding at December 31, 2013		3,268,013	$	10.43
Warrants granted in connection with the January 2014 Common Stock Offering, as more fully described in Note 9		1,801,802	$	4.10
Warrants exercised for common stock	–		–
Warrants outstanding at March 31, 2014		5,069,815	$	8.18
Aggregate intrinsic value of outstanding warrants at March 31, 2014	$	-
Weighted average remaining contractual terms (in years)		3.13

Schedule of Common Stock Warrant Liability Valuation Assumptions [Table Text Block]

	March 31, 2014			December 31, 2013
Risk-free interest rate		0.13	%		0.13	%
Expected volatility		64.74	%		64.74	%
Expected life (in years)		1.25			1.25
Expected forfeiture rate		0.0	%		0.0	%
Expected dividend yield		0.00	%		0.00	%

Schedule of Common Stock Warranty Liability [Table Text Block]

Beginning balance as of January 1, 2014	$	3,026
Gain from the adjustment for the change in fair value included in net income		(3,026	)
Ending balance as of March 31, 2014	$	–