Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Balance Sheets [Abstract]
Series B convertible preferred stock, par value	$ 0.001	$ 0.001
Series B convertible preferred stock, shares authorized	8,000,000	8,000,000
Series B convertible preferred stock, share issued	5,333,340	5,333,340
Series B convertible preferred stock, shares outstanding	5,333,340	5,333,340
Series B convertible preferred stock, Liquidation preference value	$ 20,250	$ 20,250
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	57,464,160	57,464,160
Common stock, shares outstanding	57,464,160	57,464,160