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STOCK BASED COMPENSATION (Details 2) (USD $)
In Thousands, except Share data, unless otherwise specified
 9 Months Ended 194 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
May 23, 2012
Sep. 30, 2012
Stock options
security
Sep. 30, 2011
Stock options
Dec. 31, 2011
Stock options
Sep. 30, 2012
Stock options
Executive officers
Sep. 30, 2012
Stock options
Rank-in-file employees
Sep. 30, 2011
Stock options
Minimum
Sep. 30, 2012
Stock options
Minimum
Sep. 30, 2012
Stock options
Minimum
Executive officers
Sep. 30, 2012
Stock options
Minimum
Rank-in-file employees
Sep. 30, 2012
Stock options
Maximum
Sep. 30, 2011
Stock options
Maximum
Sep. 30, 2012
Stock options
Maximum
Executive officers
Sep. 30, 2012
Stock options
Maximum
Rank-in-file employees
Nov. 30, 2008
Restricted Stock
Sep. 30, 2012
Restricted Stock
Dec. 31, 2011
Restricted Stock Units
Nov. 30, 2008
Restricted Stock Units
Mar. 31, 2012
Restricted Stock Units
Sep. 30, 2012
Restricted Stock Units
Dec. 31, 2011
Restricted Stock Units
Dec. 31, 2008
Restricted Stock Units
Stock-based compensation                                                  
Number of shares reserved for issuance       10,000,000                                          
Number of shares reserved for issuance before amendment       5,200,000                                          
Expiration period                           10 years                      
Vesting period         4 years             3 years 3 years     5 years 4 years           3 years 3 years 4 years
Options                                                  
Options outstanding at the beginning of the period (in shares)         502,253                                        
Granted (in shares)         33,571 28,500                                      
Exercised (in shares)         (15,438) (948)                                      
Cancelled / forfeited (in shares)         (39,970)                                        
Options outstanding at the end of the period (in shares)         480,415   502,253                                    
Unvested at the end of the period (in shares)         77,607                                        
Vested and exercisable at the end of the period (in shares)         402,808                                        
Weighted Average Exercise Price                                                  
Options outstanding at the beginning of the period (in dollars per share)         $ 26.11                                        
Granted (in dollars per share)         $ 3.29                                        
Exercised (in dollars per share)         $ 3.06                                        
Cancelled / forfeited (in dollars per share)         $ 20.03                                        
Options outstanding at the end of the period (in dollars per share)         $ 25.76   $ 26.11                                    
Unvested at the end of the period (in dollars per share)         $ 9.00                                        
Vested and exercisable at the end of the period (in dollars per share)         $ 28.99                                        
Weighted Average Remaining Contractual Term (years)                                                  
Options outstanding         5 years 10 months 2 days   6 years 5 months 8 days                                    
Unvested at the end of the period         8 years 8 months 1 day                                        
Vested and exercisable at the end of the period         5 years 3 months 18 days                                        
Aggregate Intrinsic Value                                                  
Options outstanding         $ 212   $ 140                                    
Unvested at the end of the period         36                                        
Vested and exercisable at the end of the period         176                                        
Stock based compensation, additional disclosures                                                  
Percentage of the award vesting one year from the date of grant         0.25                         0.25              
Period for vesting of one-fourth award         1 year                         1 year              
Percentage of the award vesting each month after one year         0.0208                         0.0208              
Percentage of the award vesting each month               0.0278 0.0208                                
Assumptions for stock option grants to employees and directors                                                  
Expected term         6 years         5 years         6 years                    
Risk free interest rate (as a percent)         0.95%         1.47%         2.29%                    
Expected volatility (as a percent)         98.00%         93.00%         99.00%                    
Resulting weighted average grant fair value (in dollars per share)         $ 2.52 $ 8.05                                      
Stock based compensation, additional information                                                  
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                                        
Cash proceeds $ 48 $ 3 $ 221   $ 48 $ 3                                      
Nonvested activity                                                  
Non-vested at the beginning of the period (in shares)                                     1,632     36,463 36,463    
Granted (in shares)                                   7,143   34,000 13,100 12,281 12,281    
Forfeited (in shares)                                             (6,904)    
Vested (in shares)                                     (1,341)       (2,010)    
Non-vested at the end of the period (in shares)                                     291 36,463     39,830 36,463  
Weighted Average Grant Date Value Per Share                                                  
Non-vested at the beginning of the period (in dollars per share)                                     $ 3.08     $ 5.60 $ 5.60    
Granted (in dollars per share)                                             $ 3.85    
Forfeited (in dollars per share)                                             $ 4.99    
Vested (in dollars per share)                                     $ 3.08       $ 3.08    
Non-vested at the end of the period (in dollars per share)                                     $ 3.08 $ 5.60     $ 5.32 $ 5.60