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STOCK BASED COMPENSATION (Details 3) (USD $) | 6 Months Ended | 203 Months Ended |  | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | May 23, 2012 | Jun. 30, 2013 Stock options security | Jun. 30, 2012 Stock options | Dec. 31, 2012 Stock options | Jun. 30, 2013 Stock options Minimum | Jun. 30, 2013 Stock options Maximum
Stock-based compensation |  |  |  |  |  |  |  |  |
Number of shares reserved for issuance |  |  |  | 1,428,571 |  |  |  |  |
Number of shares reserved for issuance before amendment |  |  |  | 742,857 |  |  |  |  |
Expiration period |  |  |  |  | 10 years |  |  |  |
Vesting period | 4 years |  |  |  | 4 years |  |  |  |
Cash proceeds |  | $ 34,000 | $ 267,000 |  |  | $ 34,000 |  |  |
Number of options outstanding |  |  |  |  |  |  |  |  |
Options outstanding at the beginning of the period (in shares) |  |  |  |  | 463,023 |  |  |  |
Granted (in shares) |  |  |  |  | 32,697 | 235,000 |  |  |
Exercised (in shares) |  |  |  |  | 0 | 77,062 |  |  |
Cancelled / forfeited (in shares) |  |  |  |  | (8,001) |  |  |  |
Options outstanding at the end of the period (in shares) |  |  |  |  | 487,719 |  | 463,023 |  |
Unvested at the end of the period (in shares) |  |  |  |  | 85,606 |  |  |  |
Vested and exercisable at the end of the period (in shares) |  |  |  |  | 402,113 |  |  |  |
Weighted average exercise price |  |  |  |  |  |  |  |  |
Options outstanding at the beginning of the period (in dollars per share) |  |  |  |  | $ 26.61 |  |  |  |
Granted (in dollars per share) |  |  |  |  | $ 3.01 |  |  |  |
Cancelled / forfeited (in dollars per share) |  |  |  |  | $ 17.10 |  |  |  |
Options outstanding at the end of the period (in dollars per share) |  |  |  |  | $ 25.18 |  | $ 26.61 |  |
Unvested at the end of the period (in dollars per share) |  |  |  |  | $ 6.47 |  |  |  |
Vested and exercisable at the end of the period (in dollars per share) |  |  |  |  | $ 29.20 |  |  |  |
Weighted average remaining contractual term |  |  |  |  |  |  |  |  |
Options outstanding |  |  |  |  | 5 years 5 months 16 days |  | 5 years 6 months 29 days |  |
Unvested at the end of the period |  |  |  |  | 8 years 9 months 11 days |  |  |  |
Vested and exercisable at the end of the period |  |  |  |  | 4 years 9 months 4 days |  |  |  |
Aggregate intrinsic value |  |  |  |  |  |  |  |  |
Options outstanding |  |  |  |  | 3,000 |  | 347,000 |  |
Vested and exercisable at the end of the period |  |  |  |  | 3,000 |  |  |  |
Stock based compensation, additional disclosures |  |  |  |  |  |  |  |  |
Forfeiture rate (as a percent) |  |  |  |  |  |  |  | 0.00% | 30.00%
Expense recognized due to revision of forfeiture rate |  |  |  |  |  | $ 1,000 |  |  |
Change in forfeiture rate (as a percent) | 0.00% |  | 0.00% |  |  |  |  |  |
Number of Federal Reserve securities whose weighted average is used for calculation of weighted average risk-free interest rate |  |  |  |  | 2 |  |  |  |

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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + 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 (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(f) -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. + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(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. + Details
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