Business, Liquidity and Summary of Significant Accounting Policies (Detail Textuals) (USD $)	3 Months Ended					1 Months Ended			0 Months Ended
	Mar. 31, 2012	Mar. 31, 2013	Feb. 28, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 24, 2014 Subsequent Event	Jan. 31, 2014 Subsequent Event	Aug. 31, 2013 Subsequent Event	Mar. 07, 2014 Series C Preferred Stock Subsequent Event
Business, Going Concern And Summary Of Significant Accounting Policies [Line Items]
Accumulated deficit		$ (328,364,000)		$ (329,740,000)
Working capital deficit		(5,200,000)
Unrestricted cash	437,000	99,000		216,000	976,000
Aggregate principal and interest amount of promissory notes						1,500,000
Number of shares issuable through promissory notes						2,000,000
Sale of Series C Convertible Preferred Stock to purchase one share of common stock									1,200
Sale of warrants to purchase one share of common stock			1,000,000					4,000,000	6,000,000
Exercise price of warrants			0.28	0.28			0.89	0.28	0.75
Proceeds from sales of common shares and warrants, net	$ 1,111,000								$ 6,000,000