Nature of Operations, Risks and Uncertainties and Liquidity (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Oct. 17, 2012	Sep. 27, 2012	Dec. 31, 2009
Debt Instrument [Line Items]
Non-interest bearing promissory notes	$ 600,000				$ 575,000				$ 600,000	$ 575,000
Maturity date of Notes									Sep. 26, 2012
Nature of Operations Risks and Uncertainties and Liquidity (Textual) [Abstract]
Cash and cash equivalents	1,484,000				3,069,000				1,484,000	3,069,000	5,326,000			3,566,000
Working capital deficiency	34,700,000								34,700,000
Stockholders' deficit	(66,066,000)				(64,527,000)				(66,066,000)	(64,527,000)	(82,520,000)			(35,227,000)
Accumulated deficit	(467,820,000)				(465,892,000)				(467,820,000)	(465,892,000)
Net Income (loss)	627,000	(4,587,000)	2,768,000	(736,000)	19,816,000	(17,606,000)	1,842,000	10,999,000	(1,928,000)	15,051,000	(56,909,000)
Operating loss	(2,161,000)	(1,474,000)	(1,421,000)	(1,765,000)	(2,330,000)	(1,531,000)	(2,226,000)	(2,050,000)	(6,821,000)	(8,136,000)	(11,543,000)
Amount payable in principal and interest due under the terms of MHR convertible notes at maturity									30,500,000
Increased rate of senior secured convertible notes													13.00%
Promissory Note issued to MHR, principal amount												1,400,000
Book value of MHR convertible notes including outstanding principal, interest and discount	31,576,000				25,441,000				31,576,000	25,441,000
Process from participation in program									1,500,000
Capital resources expected continue operations period									Apr. 15, 2013
MHR Promissory Notes [Member]
Debt Instrument [Line Items]
Non-interest bearing promissory notes													600,000
Maturity date of Notes									Sep. 26, 2012