v2.4.0.6

Stock Options Outstanding and Exercisable (Detail) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Option shares
Options outstanding	10,890,000	0
Options vested and expected to vest
Options exercisable	10,890,000
Option exercise price
Options outstanding	$ 0.97
Options vested and expected to vest
Options exercisable	$ 0.97
Option life (years)
Options outstanding	10 years
Options exercisable	10 years
Option Intrinsic value
Options outstanding	$ 8,691,127
Options vested and expected to vest
Options exercisable	$ 8,691,127

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options outstanding.

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