Consolidated Statement Of Changes In Redeemable Convertible Preferred Stock And Stockholders' Equity (Deficit) (Parenthetical) (USD $)	12 Months Ended	150 Months Ended
	Dec. 31, 2012	Dec. 31, 2012
Issuance of stock, issuance costs	$ 1,597,000	$ 17,000
Issuance During Period 14th
Issuance of stock, issuance costs		1,597,000
Series B-1 12% Redeemable Convertible Preferred Stock | Issuance During Period 2nd
Issuance of stock, issuance costs		300,000
Series B-2 12% Redeemable Convertible Preferred Stock | Issuance During Period 3rd
Issuance of stock, issuance costs		188,000
Series C Super Dividend Convertible Preferred Stock | Issuance During Period 4th
Issuance of stock, issuance costs		47,000
Cash | Issuance During Period 2nd
Issuance of stock, issuance costs		49,000
Cash | Issuance During Period 12th
Issuance of stock, Date		Feb. 25, 2008
Issuance of stock, issuance costs		369,000
Private Placement | Issuance During Period 3rd
Issuance of stock, issuance costs		212,000
Private Placement | Issuance During Period 5th
Issuance of stock, issuance costs		18,000
Private Placement | Issuance During Period 8th
Issuance of stock, issuance costs		128,000
Private Placement | Issuance During Period 9th
Issuance of stock, issuance costs		559,000
Private Placement | Issuance During Period 10th
Issuance of stock, issuance costs		466,000
Private Placement | Issuance During Period 11th
Issuance of stock, issuance costs		485,000
Private Placement | Series A 12% Convertible Preferred Stock | Issuance During Period 1st
Issuance of stock, Date		Feb. 04, 2008
Issuance of stock, issuance costs		$ 52,000