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Stock-Based Compensation (Assumptions Used in the Black-Scholes Option Pricing Model) (Details) (USD $)	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009
Weighted-average grant date fair value	$ 2.81	$ 1.82
Options granted	773,018	1,107,342
Maximum [Member]
Risk-free interest rate	1.43%	1.45%
Expected volatility	75.00%	72.00%
Expected option life, years	4.1	4.0
Minimum [Member]
Risk-free interest rate	0.78%	1.40%
Expected volatility	72.00%	65.00%
Expected option life, years	4.0	3.8

X

- Definition

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

+ References

No definition available.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

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X

- Definition

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the holders' expected behavior.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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- Definition

The estimated measure of the percentage amount by which a share price is expected to fluctuate during the expected term of a nonvested share or option award issued to other than an employee.

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-Paragraph A240

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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- Definition

The risk-free interest rate assumption that is used in valuing a nonvested share or option award issued to other than an employee.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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