CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Jun. 30, 2012		Dec. 31, 2011
Stockholders' equity
Series A convertible preferred stock, par value (in dollars per share)	$ 0.001	[1]	$ 0.001
Series A convertible preferred stock, shares authorized (in shares)	2,000,000	[1]	2,000,000
Series A convertible preferred stock, shares issued (in shares)	107,172	[1]	107,172
Series A convertible preferred stock, shares outstanding (in shares)	107,172	[1]	107,172
Common stock, par value (in dollars per share)	$ 0.001	[1]	$ 0.001
Common stock, shares authorized (in shares)	500,000,000	[1]	500,000,000
Common stock, shares issued (in shares)	91,735,857	[1]	91,670,192
Common stock, shares outstanding (in shares)	91,735,857	[1]	91,670,192

[1] Unaudited