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]
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Dec. 31, 2011
Class A Common Stock [Member]
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Dec. 31, 2010
2000 Plan [Member]
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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 |