BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Stockholders' Equity:
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	2,000,000	2,000,000
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	140,000,000	140,000,000
Common stock, shares issued (in shares)	106,206,488	83,705,376
Common stock , shares outstanding (in shares)	106,206,488	83,705,376
Series D Preferred Stock [Member]
Stockholders' Equity:
Preferred stock, shares authorized (in shares)	25,000	25,000
Preferred stock, shares issued (in shares)	0	5,242
Preferred stock, shares outstanding (in shares)	0	5,242
Preferred stock, aggregate liquidation preference	$ 0	$ 5,242,000