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FAIR VALUE (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  |  | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 Liability | Sep. 30, 2012 Liability | Sep. 30, 2011 Preferred Stock, Conversion Feature | Sep. 30, 2011 Preferred Stock, Conversion Feature | Sep. 30, 2011 Preferred Stock Warrant Liability | Sep. 30, 2011 Preferred Stock Warrant Liability | Sep. 30, 2012 Estimate of Fair Value, Fair Value Disclosure Fair Value, Inputs, Level 1 | Dec. 31, 2011 Estimate of Fair Value, Fair Value Disclosure Fair Value, Inputs, Level 1 | Sep. 30, 2012 Minimum | Sep. 30, 2012 Maximum
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock warrant, common stock called | 16,172,408 |  | 16,172,408 |  |  |  |  |  |  |  |  |  |  |
Common stock warrants issued | 0 |  | 11,000,000 |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  |  |  |  |  |  |  |  |  |  | $ 3,998 | $ 0 |  |
Share price | $ 0.95 |  | $ 0.95 |  |  |  |  |  |  |  |  |  |  |
Stock options, fair value assumptions, expected life |  |  | 4 years 4 months 6 days |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  | 15.00% |  |  |  |  |  |
Exercise price |  |  |  |  |  |  | $ 0.39 | $ 0.39 | $ 2.32 | $ 2.32 |  |  |  |
Expected term |  |  | 4 years 6 months |  |  |  |  | 4 years 3 months |  | 1 year 6 months |  |  | 3 years | 5 years
Risk-free interest rate |  |  | 0.54% |  |  |  |  | 0.96% |  | 0.25% |  |  |  |
U.S. Treasury bond, term |  |  |  |  |  |  |  | 5 years |  | 2 years |  |  |  |
Volatility |  |  | 55.00% |  |  |  |  | 103.00% |  | 50.00% |  |  |  |
Percentage of simulated equity values below the down-round financing cut-off point |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance at June 30, 2012 |  | 10,600 |  | 4,334 | 2,100 | 3,100 | 7,600 | 1,983 | 3,000 | 2,351 |  |  |  |
Total gains or losses |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recognized in earnings |  | 600 |  | 6,866 | 0 | (1,000) | 400 | 6,017 | 200 | 849 |  |  |  |
Balance at September 30, 2012 |  | $ 11,200 |  | $ 11,200 | $ 2,100 | $ 2,100 | $ 8,000 | $ 8,000 | $ 3,200 | $ 3,200 |  |  |  |

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7534914&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph 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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 + Details
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