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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2012

Stock-Based Compensation

Schedule of weighted average assumptions used to estimate fair value of each service-based stock option grant

		Nine Months Ended September 30,
Service-Based Stock Options		2011		2012
Expected dividend rate		0%		0%
Expected stock price volatility		72.9% - 78.9%		72.9% - 74.9%
Risk-free interest rate		1.7% - 2.7%		0.9% -1.5%
Expected life (years)		6.0 - 6.3		6.0 - 6.3

Summary of activity for service-based stock options

Service-Based Stock Options		Options		Weighted Average Exercise Price			Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
Outstanding at December 31, 2011		8,079,667		$	2.38		8.4		$	674,000
Granted		4,507,445		$	2.36
Exercised		(144,167	)	$	1.48				$	52,000
Cancelled		(1,057,700	)	$	2.03
Forfeited or expired		(828,432	)	$	2.20
Outstanding at September 30, 2012		10,556,813		$	2.43		8.4		$	206,000
Exercisable at September 30, 2012		3,727,232		$	2.75		7.3		$	119,000

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- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ 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 (c)(1)

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

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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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