Condensed Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Preferred stock, shares authorized	5,000	5,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	280,000	140,000
Shares issued	62,682	27,643
Common stock, shares outstanding	62,682	27,643
Series D Convertible Redeemable Preferred Stock [Member]
Series D Redeemable convertible preferred stock, par value		$ 0.01
Series D Redeemable convertible preferred stock, shares designated		1,124
Series D Redeemable convertible preferred stock, shares issued		1,124
Series D Redeemable convertible preferred stock, shares outstanding		1,124
Series E Preferred Stock [Member]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares designated	424	424
Preferred stock, shares issued	424	424
Preferred Stock, shares outstanding	424	424
Series D Preferred Stock [Member]
Preferred stock, par value	$ 0.01
Preferred stock, shares designated	1,124
Preferred stock, shares issued	1,124
Preferred Stock, shares outstanding	1,124
Series A Preferred Stock [Member]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares designated	1,500	1,500
Preferred stock, shares issued	1	1
Preferred Stock, shares outstanding	1	1