Fair Value (Fair Value Assumptions) (Narrative) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Probability of put right being triggered	1.00%
Period of historical stock values	100 days
Floor of historical stock values	100.00%
Expected dividend yield		$ 0	$ 0	$ 0
Period until FDA product is available for commercial sales		18 months
Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Probability of put right being triggered	5.00%
Underlying price per share		$ 0.27	$ 0.80	$ 0.46
Exercise price per share		$ 1.65	$ 1.65	$ 1.65
Risk-free interest rate		0.23%	0.44%	1.58%
Expected holding period		1 year 7 months 20 days	2 years 7 months 17 days	3 years 7 months 17 days
Expected volatility		113.56%	110.27%	120.55%
Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Probability of put right being triggered	0.50%
Underlying price per share		$ 0.19	$ 0.25	$ 0.20
Exercise price per share		$ 1.31	$ 1.31	$ 1.31
Risk-free interest rate		0.06%	0.19%	0.29%
Expected holding period		0 years 4 months 17 days	1 year 4 months 17 days	2 years 4 months 17 days
Expected volatility		69.74%	69.21%	74.55%
Warrant
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities, Fair Value Disclosure		$ 14	$ 295	$ 380
Fair Value Measurements, Significant Assumptions		The significant assumptions using the Monte Carlo Simulation approach for valuation of the Warrants are: (i)        Risk-Free Interest Rate. The risk-free interest rates for the Warrants are based on U.S. Treasury constant maturities for periods commensurate with the remaining expected holding periods of the warrants.(ii)       Expected Holding Period. The expected holding period represents the period of time that the Warrants are expected to be outstanding until they are exercised. The Company utilizes the remaining contractual term of the Warrants at each valuation date as the expected holding period.(iii)      Expected Volatility. Expected stock volatility is based on daily observations of the Company’s historical stock values for a period commensurate with the remaining expected holding period on the last day of the period for which the computation is made. (iv)       Expected Dividend Yield. Expected dividend yield is based on the Company’s anticipated dividend payments over the remaining expected holding period. As the Company has never issued dividends, the expected dividend yield is $-0- and this assumption will be continued in future calculations unless the Company changes its dividend policy.(v)       Expected Probability of a Fundamental Transaction. The possibility of the occurrence of a Fundamental Transaction triggering a Put right is extremely remote. As discussed above, a Put right would only arise if a Fundamental Transaction 1) is an all cash transaction; (2) results in the Company going private; or (3) is a transaction involving a person or entity not traded on a national securities exchange.