Warrants (Tables)

9 Months Ended

Sep. 30, 2013

Warrants (Tables) [Line Items]

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

	Securities Into Which	Total Warrants	Warrants Subject	Exercise	Expiration
	Warrants are Convertible	Outstanding	to Anti-Dilution	Price	Date
.	Common stock	6,128,379	—	$2.60	August and September 2018
	Common stock	717,905	717,905	$4.04	June and August 2014
	Common stock	552,186	552,186	$4.22	December 2014 and January 2015
	Common stock	7,740	—	$77.52	June and August 2014
	Common stock	1,022	—	$83.49	December 2014 and January 2015
	Common stock	960	—	$145.90	December 2015
	Common stock	2,047	—	$149.09	July 2015
	Common stock	30,192	—	$154.05	July 2015
	Common stock	2,012	—	$298.17	December 2014 and November 2015
	Subtotal	7,442,443	1,270,091
	Series C CPS	10,845	—	$230.52	March 2014
	Total	7,453,288	1,270,091

Warrant [Member]

Warrants (Tables) [Line Items]

Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Table Text Block]

	September 30, 2013		September 30, 2012
Risk-free interest rate	0.07% - 0.15%	0	0.15% - 0.22%
Expected remaining term	0.71 - 1.23 Years		0.64 - 1.79 Years
Expected volatility	99.23% - 112.18%		106.78% - 122.48%
Dividend yield	0%		0%