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Contractual life of stock options and other awards under the shared-based compensation plans

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No definition available.

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- Definition

The percentage of a share-based payment award that vests in year five.

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- Definition

The percentage of a share-based payment award that vests in year four.

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- Definition

The percentage of a share-based payment award that vests in year one.

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No definition available.

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- Definition

The percentage of a share-based payment award that vests in year three.

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- Definition

The percentage of a share-based payment award that vests in year two.

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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

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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

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Weighted average expected dividend for an entity using a valuation technique with different dividend rates during the contractual term.

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Weighted average expected volatility of stock price.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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

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- Definition

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

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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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

-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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(1)

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

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Share-Based Compensation Plan Information (Details) (USD $)	12 Months Ended												1 Months Ended		1 Months Ended		1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 2008 Plan [Member]	Dec. 31, 2011 2008 Plan [Member]	Dec. 31, 2010 2008 Plan [Member]	Dec. 31, 2012 2011 Plan [Member]	Dec. 31, 2011 2011 Plan [Member]	Dec. 31, 2012 1997 Plan [Member]	Dec. 31, 2012 1999 Plan [Member]	Dec. 31, 2012 2002 Plan [Member]	Dec. 31, 2012 July 2009 Non-vested Stock Award [Member]	Dec. 31, 2010 December 2010 Stock Option Award [Member]	Dec. 31, 2012 December 2010 Stock Option Award [Member]	Jul. 31, 2012 July 2012 Stock Option Award [Member]	Dec. 31, 2012 July 2012 Stock Option Award [Member]	Jul. 31, 2011 July 2011 Stock Option Award [Member]	Dec. 31, 2012 July 2011 Stock Option Award [Member]	Dec. 31, 2012 All Other Stock Option Awards [Member]	Dec. 31, 2012 July 2011 Non-vested Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under the Plan				5,000,000			1,500,000		2,400,000	2,000,000	3,000,000
Options granted in the period	2,125,000			900,000	905,000	1,935,000	1,225,000	75,000					500,000		1,755,000		506,600
Remaining shares available for grant under the Plan				202,150			625,000
Contractual life of stock options and other awards under share-based compensation plans				10 years			10 years
Option Vesting Schedule [Abstract]
Vesting percentage, year one												0.00%		50.00%		33.00%		33.00%	0.00%	33.00%
Vesting percentage, year two												25.00%		50.00%		33.00%		33.00%	25.00%	33.00%
Vesting percentage, year three												25.00%				34.00%		34.00%	25.00%	34.00%
Vesting percentage, year four												25.00%							25.00%
Vesting percentage, year five												25.00%							25.00%
Black-Scholes Assumptions [Abstract]
Expected life (years)	5 years 6 months	5 years 6 months	5 years 4 months 24 days
Expected volatility	92.40%	92.60%	91.90%
Expected dividend yield	$ 0	$ 0	$ 0
Risk-free interest rate	0.70%	1.60%	1.70%
Weighted average fair value of options granted during the year	$ 0.47	$ 0.69	$ 0.49