CONSOLIDATED BALANCE SHEETS [Parenthetical] (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Restricted Cash and Cash Equivalents	$ 4,499
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	40,885,411	40,775,411
Common stock, shares outstanding	40,885,411	40,775,411
Accumulated deficit during development stage (in dollars)	$ 150,335	$ 146,755