BALANCE SHEETS [Parenthetical] (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Common Stock, par value (in dollars per share)	$ 0.0005	$ 0.0005
Common Stock, shares authorized	100,000,000	100,000,000
Common Stock, shares issued	40,775,411	40,775,411
Common Stock, shares outstanding	40,775,411	40,775,411
Accumulated during development stage (in dollars)	$ 146,755	$ 152,600