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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Stock-Based Compensation [Abstract]

Summary of assumptions used to estimate the fair value of stock options

		Three Months Ended June 30,								Six Months Ended June 30,
		2012				2011				2012				2011
Risk-free interest rate			0.32	%			1.16%-1.72	%			0.37	%			1.16%-1.89	%
Expected volatility			122	%			134	%			131	%			134	%
Expected life in years			3.5				4				4				4
Dividend yield			—				—				—				—
Forfeiture rate			8	%			11	%			8	%			11	%

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Details

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