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12. Stock-Based Compensation (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Dividend-yield	0.00%	0.00%
Risk-free interest rate	0.72%
Expected volatility	79.08%
Expected life (years)		5 years
Options
Expected volatility	79.08%	103.22%
Weighted average fair value per share of common stock	0.26	0.1
Options | Minimum
Dividend-yield	0.00%	0.00%
Risk-free interest rate	0.28%	0.20%
Expected life (years)	2 years	2 months 12 days
Options | Maximum
Dividend-yield	0.00%	0.00%
Risk-free interest rate	0.38%	1.80%
Expected life (years)	3 years	4 years

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- Definition

No authoritative reference available.

+ References

No definition available.

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- Definition

Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

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- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

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Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

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Risk-free interest rate assumption used in valuing an instrument.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

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