Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Long-term investments and other assets, fair value	$ 2,970	$ 2,826
Series B redeemable convertible preferred stock, par value		$ 0.01
Series B redeemable convertible preferred stock, shares authorized		45,000
Series B redeemable convertible preferred stock, shares issued		35,217
Series B redeemable convertible preferred stock, shares outstanding		35,217
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	8,071,674	6,343,295
Common stock, shares outstanding	7,826,674	6,188,295
Treasury stock, shares	245,000	155,000