Stock Awards (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2013

Dec. 31, 2012

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

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

				Stock Options					Restricted Stock
							Weighted					Weighted
	Shares			Number of			Average		Number of			Average
	Available			Options			Exercise		Shares			Grant-Date
	For Grant			Outstanding			Price		Outstanding			Fair Value
Balance at January 1, 2013		29,503			114,896		$	41.67		72		$	13.91
Granted		(18,861	)		18,861		$	4.95		—		$	—
Vested		—			—		$	—		(72	)	$	13.91
Forfeited		4,617			(4,617	)	$	9.98		—		$	—
Canceled		2,385			(5,196	)	$	118.82		—		$	—
Balance at September 30, 2013		17,644			123,944		$	34.01		—		$	—

			Stock Options				Restricted Stock
					Weighted				Weighted
	Shares		Number of		Average		Number of		Average
	Available		Options		Exercise		Options		Grant-Date
	For Grant		Outstanding		Price		Outstanding		Fair Value
Balance at January 1, 2011	2,191,821		5,543,893		$	1.5218	127,500		$	1.6422
2008 Plan Amendment	8,000,000		-		$	-	-		$	-
Granted	(1,504,635	)	1,153,550		$	0.6427	351,085		$	0.8497
Exercised	-		(324,740	)	$	0.3220	-		$	-
Vested	-		-		$	-	(362,944	)	$	0.8909
Forfeited	1,247,521		(1,140,021	)	$	1.2928	(110,000	)	$	1.6050
Canceled	370,364		(925,782	)	$	1.7061	(641	)	$	2.3900
Balance at December 31, 2011	10,305,071		4,306,900		$	1.3978	5,000		$	1.2500
Granted	(9,785,500	)	9,724,000		$	0.1164	61,500		$	0.1385
Vested	-		-		$	-	(59,000	)	$	0.2325
Forfeited	1,471,073		(1,471,073	)	$	0.5925	-		$	-
Canceled	937,342		(1,135,329	)	$	1.3123	-		$	-
Balance at December 31, 2012	2,927,986		11,424,498		$	0.4193	7,500		$	0.1400

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

		Weighted
		Average	Weighted
		Remaining	Average		Aggregate
	Number of	Contractual	Exercise		Intrinsic
Options	Shares	Life (in Years)	Price		Value
Outstanding	11,424,498	5.71	$	0.4193	$	2,898
Vested and expected to vest	10,262,319	5.66	$	0.4502	$	2,898
Exercisable	4,123,060	4.82	$	0.8747	$	2,898

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

	Nine Months Ended September 30,
	2013		2012
Risk-free interest rate	0.71% - 1.22%	0	0.71% - 1.14%
Expected term	4.75 Years		4.75 Years
Expected volatility	96.73% - 108.14%		65.02% - 98.80%
Dividend yield	0%		0%

	Year Ended December 31,
	2012		2011
Risk-free interest rate	0.71% - 1.14%	0	0.79% - 2.24%
Expected term	4.75 Years		4.75 Years
Expected volatility	65.02% - 103.61%		42.44% - 66.83%
Dividend yield	0%		0%