Financing (Tables)

12 Months Ended

Dec. 31, 2012

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Significant Terms Debentures for Entire Hybrid Instrument [Table Text Block]

The following table summarizes the significant terms of each of the debentures for which the entire hybrid instrument is recorded at fair value as of December 31, 2012:

								Conversion Price – Lower of Fixed Price or Percentage of VWAP for Look-back Period
						Default				Anti-Dilution
Debenture	Face		Interest			Interest		Fixed		Adjusted				Default			Look-back
Issuance Year	Amount		Rate			Rate		Price		Price		%		%			Period
		(in thousands)
2006	$	6,180		9.5	%		n/a	$	2.00	$	0.001890		90%		n/a			125 Days
2007		6,856		9.5	%		n/a	$	2.00	$	0.001680-$0.001890		80%-90%		n/a			125 Days
2008		6,468		9.5	%		20%-24%	$	1.00-$2.00	$	0.001680-$0.001995		80%-95%		50%-75	%		125 Days
2009		1,644		9.5	%		20%	$	2.00	$	0.001995		95%		50	%		125 Days
2010		3,806		9.5	%		20%	$	0.10-$0.30	$	0.001995		95%		50	%		60 Days
2011		1,954		9.5	%		20%	$	0.10	$	0.001995		95%		50	%		60 Days
2012		1,979		9.5	%		20%	$	0.10	$	0.001995		95%		50	%		60 Days
Total	$	28,887

Schedule of Significant Terms of Debentures Carried at Amortized Cost [Table Text Block]

The table below summarizes the significant terms of the debentures that are carried at their amortized cost and for which the compound embedded derivative is bifurcated and accounted for as a derivative liability as of December 31, 2012:

						Conversion Price – Lower of Fixed Price or Percentage of VWAP for Look-back Period
								Anti-Dilution
Debenture	Face					Fixed		Adjusted					Look-back
Issuance Year	Amount		Interest Rate			Price		Price		%			Period
	(in thousands)
2006	$	53		10.0	%	$	2.00	$	0.00486		90	%		125 days

Schedule of Number of Shares Issued Convertible Preferred Stock [Table Text Block]

The following table provides a summary of the preferred stock conversions that have occurred since inception and the number of common shares issued upon conversion.

			Preferred		Preferred		Common
	Preferred shares		shares		shares		shares
	issued		converted		remaining		issued
	(in thousands)
Series C preferred stock		22		17		5		273,382
Series D preferred stock		25		22		3		245,162

Schedule of Debt Conversions [Table Text Block]

The outstanding principal and accrued interest for the debentures as of December 31, 2012 is reflected in the following table in addition to the principal and interest converted since inception and the number of common shares issued upon conversion.

	Outstanding		Principal and
	principal and		accrued interest		Common
	accrued interest at		converted since		shares
	December 31, 2012		inception		issued
	(in thousands)
Debentures	$	42,959	$	9,155		1,565,861

Schedule of Allocation Embeded Debt Instument Warrants and Assumption [Table Text Block]

Significant assumptions used to value the hybrid debt instruments and warrants as of inception of the financings are also provided in the table below.

	January 11,			February 6,			March 26,			April 26,			June 1,			July 20,
	2012			2012			2012			2012			2012			2012
	issuance			issuance			issuance			issuance			issuance			issuance
	(in thousands)
Gross proceeds	$	400		$	450		$	450		$	450		$	450		$	450
Structuring and due diligence fee		(25	)		(25	)		(25	)		(25	)		(25	)		(25	)
	$	375		$	425		$	425		$	425		$	425		$	425
Hybrid instrument		(289	)		(176	)		(287	)	$	(878	)	$	(799	)	$	(732	)
Derivative warrants		(13	)		(9	)		(42	)		(11	)		(9	)		(8	)
Day one derivative loss		-			-			-			464			383			315
		(302	)		(185	)		(329	)	$	(425	)	$	(425	)	$	(425	)
Warrant shares issued (in thousands)		1,000			1,000			1,000			1,000			1,000			1,000
Initial exercise price of warrants	$	0.1500		$	0.1500		$	0.1500		$	0.1500		$	0.1500		$	0.1500
Warrant valuation inputs:
Anti-dilution adjusted exercise price	$	0.0135		$	0.0090		$	0.0418		$	0.0117		$	0.0093		$	0.0080
Expected life		5 years			5 years			5 years			5 years			5 years			5 years
Estimated volatility		274	%		254	%		243	%		178	%		179	%		174	%
Risk free rate of return		0.32	%		0.33	%		0.48	%		0.36	%		0.32	%		0.28	%
Dividend yield		—			—			—			—			—			—
Hybrid instrument valuation inputs:
Conversion price	$	0.009975		$	0.009425		$	0.030772		$	0.007125		$	0.009300		$	0.006840
Equivalent volatility		170	%		166	%		170	%		247	%		178	%		176	%
Equivalent interest risk		14.00	%		14.00	%		14.00	%		14.00	%		14.00	%		14.00	%
Equivalent credit risk		7.37	%		7.37	%		7.19	%		7.20	%		7.18	%		7.21	%

Schedule of Activities of Compound Embedded Derivative [Table Text Block]

The following table reflects the face value of the instruments, their amortized carrying value and the fair value of the separately-recognized compound embedded derivative, as well the number of common shares into which the instruments are convertible as of December 31, 2012 and 2011.

December 31, 2012							Embedded		Common
	Face		Carrying		Accrued		Conversion		Stock
	Value		Value		Interest		Feature		Shares
	(in thousands)
Series C preferred stock	$	4,840	$	4,840	$	-	$	1,988		923,953
Series D preferred stock	$	348	$	348	$	-		143		66,457
Debentures:
2006	$	53	$	53	$	7		16		11,871
Total	$	53	$	53	$	7	$	2,147		1,002,281

December 31, 2011							Embedded		Common
	Face		Carrying		Accrued		Conversion		Stock
	Value		Value		Interest		Feature		Shares
	(in thousands)
Series C preferred stock	$	5,086	$	5,086	$	-	$	554		499,084
Series D preferred stock	$	1,395	$	1,395	$	-		152		136,899
Debentures:
2006	$	7,061	$	7,061	$	3,550		1,554		1,128,515
2008		4,788		4,788		2,226		932		712,474
2009		1,983		1,965		736		370		278,427
2010		3,881		1,426		770		2,692		470,718
2011		4,725		1,077		376		2,917		436,730
Total	$	22,438	$	16,317	$	7,658	$	9,171		3,662,847

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

Changes in the fair value of derivative instrument liabilities related to the bifurcated embedded derivative features of convertible instruments not carried at fair value are reported as “Gain (loss) from change in fair value of derivative liability – Series C and Series D preferred stock and debentures” in the accompanying consolidated statements of operations.

	Year ended December 31,
	2012			2011
	(in thousands)
Series C preferred stock	$	(2,066	)	$	668
Series D preferred stock		(1,286	)		921
Debentures:
2006		(3,005	)		5,622
2008		(1,350	)		3,908
2009		(484	)		1,524
2010		(34	)		2,533
2011		(4,825	)		3,104
2012		15			-
		(13,035	)		18,280
Less: Day-one loss from debenture financings		-			(2,565	)
Gain (loss) from change in fair value of derivative liability	$	(13,035	)	$	15,715

Schedule of Hybrid Financial Instrument Disclosure [Table Text Block]

The following table reflects the face value of the financial instruments, the fair value of the hybrid financial instrument and the number of common shares into which the instruments are convertible as of December 31, 2012 and 2011.

December 31, 2012					Common
	Face		Fair		Stock
	Value		Value		Shares
	(in thousands)
Debentures:
2006	$	6,180	$	14,758		5,196,283
2007		6,856		17,172		6,098,480
2008		6,468		15,492		5,487,497
2009		1,644		3,565		1,243,390
2010		3,806		7,178		2,512,724
2011		1,954		3,080		1,084,237
2012		1,979		3,047		1,073,527
Total	$	28,887	$	64,292		22,696,138

Schedule of Fair Value Hybrid Financial Instrument Disclosure [Table Text Block]

Changes in the fair value of convertible instruments that are carried in their entirety at fair value are reported as “Gain (loss) from change in fair value of hybrid financial instruments” in the accompanying consolidated statements of operations. The changes in fair value of these hybrid financial instruments were as follows:

	Year ended December 31,
	2012			2011
	(in thousands)
2006	$	2,680		$	-
2007		798			4,003
2008		5,433			1,348
2009		708			-
2010		1,858			-
2011		840			-
2012		771			-
		13,088			5,351
Less: Day-one loss from debenture financings		(1,162	)		-
Gain (loss) from changes in fair value of hybrid instruments	$	11,926		$	5,351

Schedule of Warrants Embedded Warrants Fair Value Outsanding and Anti Diluative Adjustment Disclosure [Table Text Block]

Warrants - The following table summarizes the warrants outstanding, their fair value and their exercise price after adjustment for anti-dilution provisions:

		December 31, 2012						December 31, 2011
		Anti-Dilution						Anti-Dilution
		Adjusted						Adjusted
	Expiration	Exercise				Fair		Exercise				Fair
	Year	Price		Warrants		Value		Price		Warrants		Value
				(in thousands)				(in thousands)
Warrants issued with preferred stock:
Series D preferred stock	2017		0.006840		328,947	$	709		0.00998		225,564	$	2,535
Warrants issued with debentures:
2007	2012		0.006840		-		-		0.00998		401,002		1,510
2008	2015		0.006840		896,382		1,691		0.00998		614,662		6,876
2010	2015		0.006840		306,287		571		0.00998		210,025		2,335
2011	2016		0.006840		219,298		453		0.00998		150,376		1,686
2012	2017		0.006840		131,579		263		n/a		—		—
Total					1,882,493	$	3,687				1,601,629	$	14,942

Schedule of Changes in Fair Value of Warrants [Table Text Block]

Changes in the fair value of the warrants are reported as "(Gain) loss from change in fair value of derivative liability - warrants" in the accompanying consolidated statements of operations. The changes in the fair value of the warrants were as follows:

	Year ended December 31
	2012			2011
	(in thousands)
Warrants issued with preferred stock:
Series C preferred stock	$	-		$	53
Series D preferred stock		1,826			(2,280	)
Warrants issued with debentures:
2006		-			185
2007		1,510			(1,316	)
2008		5,185			(6,317	)
2010		1,764			(1,368	)
2011		1,233			(1,180	)
2012		(171	)		-
Total	$	11,347		$	(12,223	)

Schedule of Reconciliation Changes in Fair Value of Financial Instruments and Hybrid Instruments Carried at Fair Value [Table Text Block]

The following represents a reconciliation of the changes in fair value of financial instruments measured at fair value using Level 3 inputs and changes in the fair value of hybrid instruments carried at fair value during the year ended December 31, 2012: 

	Compound
	Embedded			Warrant			Hybrid
	Derivatives			Derivatives			Instruments			Total
Beginning balance, December 31, 2011:	$	9,171		$	14,942		$	16,458		$	40,571
Issuances:
January 11, 2012		289			13			-			302
February 6, 2012		176			9			-			185
March 26, 2012		287			42			-			329
April 26, 2012		-			11			878			889
June 1, 2012		-			9			799			808
July 20, 2012					8			732			740
Fair value adjustments:
Compound embedded derivatives		13,035			-			-			13,035
Warrant derivatives		-			(11,347	)		-			(11,347	)
Hybrid instruments		-			-			(11,926	)		(11,926	)
Change to fair value option related to compound embedded derivative		(29,656	)		-			29,656			-
Change to fair value option related to debenture carrying value		-			-			26,809			26,809
Day-one loss from derivative financings		-			-			(1,162	)		(1,162	)
Extinguished		17,787			-			9,692			27,479
Repayments
June 1, 2012 financing		-			-			(28	)		(28	)
July 20, 2012 financing		-			-			(666	)		(666	)
Conversions:
Series C preferred stock		(632	)		-			-			(632	)
Series D preferred stock		(1,294	)		-			-			(1,294	)
August 24, 2006 financing		(740	)		-			(926	)		(1,666	)
December 29, 2006 financing		(176	)		-			(677	)		(853	)
March 27, 2007 financing		-			-			(1,047	)		(1,047	)
August 24, 2007 financing		-			-			(831	)		(831	)
October 28, 2008 financing		-			-			(383	)		(383	)
May 1, 2009 financing		(21	)		-			-			(21	)
July 15, 2009 financing		-			-			(637	)		(637	)
December 15, 2010 financing		-			-			(215	)		(215	)
January 10, 2011 financing		-			-			(267	)		(267	)
February 8, 2011 financing		-			-			(180	)		(180	)
March 11, 2011 financing		-			-			(788	)		(788	)
April 13, 2011 financing		(226	)		-			(210	)		(436	)
May 31, 2011 financing		(885	)		-			-			(885	)
June 28, 2011  financing		(413	)		-			(53	)		(466	)
July 13, 2011 financing		(1,656	)		-			-			(1,656	)
August 15, 2011 financing		(1,441	)		-			-			(1,441	)
September 15, 2011 financing		(1,458	)		-			-			(1,458	)
October 25, 2011 financing		-			-			(141	)		(141	)
December 8, 2011 financing		-			-			(209	)		(209	)
January 11, 2012 financing		-			-			(386	)		(386	)
March 26, 2012 financing		-			-			-			-
Ending balance, December 31, 2012	$	2,147		$	3,687		$	64,292		$	70,126