Business, Liquidity and Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Fair value liability for price adjustable warrants
Balance at September 30, 2014	$ 15,495	$ 5,226
Fair Value Liability For Price Adjustable Warrants | Level 3 Significant unobservable inputs
Fair value liability for price adjustable warrants
Balance at December 31, 2013	5,226
Cashless exercise of warrants	(1,916)
Warrant issuance in connection with Series C	5,929
Change in fair value included in statement of operations	6,256
Balance at September 30, 2014	$ 15,495	$ 5,226
Exercise Price
Balance at December 31, 2013	$ 0.28
Cashless exercise of warrants	$ 0.28
Warrant issuance in connection with Series C	$ 0.75
Balance at September 30, 2014	$ 0.38	$ 0.28
Stock Price
Balance at December 31, 2013	$ 0.40
Cashless exercise of warrants	$ 1.15
Warrant issuance in connection with Series C	$ 1.50
Balance at September 30, 2014	$ 0.65	$ 0.40
Volatility
Balance at December 31, 2013	124.00%
Cashless exercise of warrants	134.00%
Warrant issuance in connection with Series C	121.00%
Balance at September 30, 2014	125.00%	124.00%
Contractual life (in years)
Contractual Life (In Years)	3 years 2 months 16 days
Cashless exercise of warrants	2 years 29 days
Warrant issuance in connection with Series C	3 years 1 month 2 days	4 years 29 days
Risk free rate
Balance at December 31, 2013	1.30%
Cashless exercise of warrants	0.79%
Warrant issuance in connection with Series C	0.64%
Balance at September 30, 2014	0.90%	1.30%