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STOCK BASED COMPENSATION (Details 3) (USD $) | 9 Months Ended | 206 Months Ended |  | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | May 23, 2012 | Sep. 30, 2013 Stock options security | Sep. 30, 2012 Stock options | Dec. 31, 2012 Stock options | Sep. 30, 2013 Stock options Minimum | Sep. 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 |  | $ 48,000 | $ 267,000 |  |  | $ 48,000 |  |  |
Number of options outstanding |  |  |  |  |  |  |  |  |
Options outstanding at the beginning of the period (in shares) |  |  |  |  | 463,023 |  |  |  |
Granted (in shares) |  |  |  |  | 32,697 | 33,571 |  |  |
Exercised (in shares) |  |  |  |  | 0 | 15,438 |  |  |
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) |  |  |  |  | 76,885 |  |  |  |
Vested and exercisable at the end of the period (in shares) |  |  |  |  | 410,834 |  |  |  |
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) |  |  |  |  | $ 18.55 |  |  |  |
Options outstanding at the end of the period (in dollars per share) |  |  |  |  | $ 25.16 |  | $ 26.61 |  |
Unvested at the end of the period (in dollars per share) |  |  |  |  | $ 6.07 |  |  |  |
Vested and exercisable at the end of the period (in dollars per share) |  |  |  |  | $ 28.74 |  |  |  |
Weighted average remaining contractual term |  |  |  |  |  |  |  |  |
Options outstanding |  |  |  |  | 5 years 2 months 12 days |  | 5 years 6 months 29 days |  |
Unvested at the end of the period |  |  |  |  | 8 years 6 months 22 days |  |  |  |
Vested and exercisable at the end of the period |  |  |  |  | 4 years 6 months 25 days |  |  |  |
Aggregate intrinsic value |  |  |  |  |  |  |  |  |
Options outstanding |  |  |  |  | 178,000 |  | 347,000 |  |
Unvested at the end of the period |  |  |  |  | 57,000 |  |  |  |
Vested and exercisable at the end of the period |  |  |  |  | $ 121,000 |  |  |  |
Stock based compensation, additional disclosures |  |  |  |  |  |  |  |  |
Forfeiture rate (as a percent) |  |  |  |  |  |  |  | 0.00% | 30.00%
Number of Federal Reserve securities whose weighted average is used for calculation of weighted average risk-free interest rate |  |  |  |  | 2 |  |  |  |

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