Stock Based Awards (Details) (USD $)	6 Months Ended
Jun. 30, 2012
Summary of options and restricted stock activity
Options beginning balance	20,852,614
Options granted
Options exercised or vested	(5,899,418)
Options forfeitures	(22,500)
Options ending balance	14,930,696
Weighted average exercise price of options beginning balance	$ 0.79
Weighted average exercise price of options granted
Weighted average exercise price of options exercised or vested	$ 0.47
Weighted average exercise price of options forfeitures	$ 4.14
Weighted average exercise price of options ending balance	$ 0.94
Restricted stock awards beginning balance	1,311,371
Restricted stock awards granted	946,996
Restricted stock awards exercised or vested	(591,229)
Restricted stock awards forfeitures	(23,483)
Restricted stock awards ending balance	1,643,655

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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-Publisher FASB

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-Paragraph A240

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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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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-Number 123R

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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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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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Number of share options (or share units) exercised during the current period.

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