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7. STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2012

Stock-Based Compensation Tables

Weighted-Average Assumptions of Stock Based Compensation

		Three months ended September 30,				Nine months ended September 30,
		2012		2011		2012		2011
Weighted-average risk-free rate		0.49%		0.90%		0.54%		1.56%
Weighted-average volatility		95.08%		97.58%		95.33%		97.50%
Dividend yield		0.00%		0.00%		0.00%		0.00%
Expected life		5.59 years		6.61 years		5.72 years		5.18 years

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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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