STOCK-BASED COMPENSATION PLANS (Details 4) (Stock options, USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Unrecognized compensation cost
Total estimated unrecognized compensation cost (in dollars)	$ 127,000
Number of options exercised after a specified period	0
Contractual term	10 years
Weighted average fair value of the options granted (in dollars per share)
Fair market value (in dollars per share)	$ 6.00	$ 13.20	$ 17.70
Expected life	1 year
Fair value of the options granted (in dollars per share)	$ 6.00	$ 13.20	$ 17.70
Minimum
Unrecognized compensation cost
Weighted average period for recognition of unrecognized compensation cost	1 year
Maximum
Unrecognized compensation cost
Weighted average period for recognition of unrecognized compensation cost	2 years
Grant in period, one
Weighted average fair value of the options granted (in dollars per share)
Fair market value (in dollars per share)	$ 6.70	$ 11.41	$ 7.30
Expected volatility (as a percent)	72.00%	91.00%	144.00%
Risk-free interest rate (as a percent)	5.00%	2.75%	4.25%
Expected life	1 year	7 years 8 months 8 days	7 years 10 months 28 days
Fair value of the options granted (in dollars per share)	$ 6.70	$ 11.41	$ 7.30
Grant in period, two
Weighted average fair value of the options granted (in dollars per share)
Fair market value (in dollars per share)	$ 5.20	$ 12.80	$ 7.00
Expected volatility (as a percent)	84.00%	87.00%	147.00%
Risk-free interest rate (as a percent)	3.50%	1.875%	4.75%
Expected life	7 years 8 months 12 days	6 years 3 months 22 days	7 years 3 months 7 days
Fair value of the options granted (in dollars per share)	$ 5.20	$ 12.80	$ 7.00
Grant in period, three
Weighted average fair value of the options granted (in dollars per share)
Fair market value (in dollars per share)		$ 7.60	$ 6.90
Expected volatility (as a percent)		93.00%	103.00%
Risk-free interest rate (as a percent)		3.00%	3.75%
Expected life		5 years	2 years
Fair value of the options granted (in dollars per share)		$ 7.60	$ 6.90
Grant in period, four
Weighted average fair value of the options granted (in dollars per share)
Fair market value (in dollars per share)			$ 25.20
Expected volatility (as a percent)			89.00%
Risk-free interest rate (as a percent)			3.125%
Expected life			6 years 3 months 25 days
Fair value of the options granted (in dollars per share)			$ 25.20

Represents the number of options which may be exercised after a specified period.

No definition available.

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- Definition

Represents the period of time, from the grant date until the time at which the share-based option award expires.

+ References

No definition available.

+ Details

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest.

+ References

No definition available.

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- Definition

Expected term of share-based compensation awards, 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 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.D.2)

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ 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)(ii)

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph e(2)(b)

-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 an option on its own shares.

+ 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)(iv)

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

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph e(2)(d)

-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 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.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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-Paragraph 2

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