Quarterly report pursuant to Section 13 or 15(d)

Stock Incentive Plan (Details)

v2.4.0.6
Stock Incentive Plan (Details) (USD $)
 6 Months Ended 26 Months Ended
Jun. 30, 2012
Dec. 31, 2010
Jun. 30, 2012
Class A Common Stock [Member]
Dec. 31, 2011
Class A Common Stock [Member]
Dec. 31, 2010
2000 Plan [Member]
Jun. 30, 2012
2010 Plan [Member]
Class A Common Stock [Member]
Dec. 31, 2010
2010 Plan [Member]
Class A Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares reserved for future issuance         28,500,000   10,000,000
Common stock, par value (in usd per share)   $ 0.0001 $ 0.0001 $ 0.0001      
Options granted to date 576,645         834,145