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Additional Paid-In Capital (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 9 Months Ended 9 Months Ended 9 Months Ended 0 Months Ended 1 Months Ended 9 Months Ended 0 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2012
Stock Option Plan [Member]
Sep. 30, 2012
2012 Offering [Member]
Sep. 30, 2012
2012 Offering [Member]
In October 2015 [Member]
Sep. 30, 2012
2012 Offering [Member]
In October 2012 [Member]
Sep. 30, 2012
2012 Offering [Member]
In July 2014 [Member]
Sep. 30, 2012
Restricted Stock Units (RSUs) [Member]
Jan. 02, 2012
Board Of Directors [Member]
Restricted Stock Units (RSUs) [Member]
Aug. 31, 2012
Board Of Directors [Member]
Restricted Stock Units (RSUs) [Member]
Sep. 30, 2012
Board Of Directors [Member]
Restricted Stock Units (RSUs) [Member]
Nov. 02, 2011
Board Of Directors [Member]
Restricted Stock Units (RSUs) [Member]
Jan. 02, 2012
Executive Management [Member]
Restricted Stock Units (RSUs) [Member]
Sep. 18, 2012
Employees And Executive Management [Member]
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Warrants issued (in shares) 2,666,666     2,499,999                    
Number of compensation warrants issued (in shares)       166,667                    
Warrants outstanding (in shares) 17,923,426 15,850,238   17,923,426                    
Number of warrants expected to expire in future (in shares)         15,219,802 36,958 2,666,666              
Percentage of common shares reserved for issuance     10.00%                      
Unrecognized compensation expense related to unvested options     $ 1,693         $ 4,568            
Weighted average compensation recognition period 10 months 6 days   10 months 6 days         1 year 9 months 29 days            
Stock options granted (in shares) 400,000               300,000       50,000 792,339
Number of awards cancelled (107,832)                 107,832        
Share price (in dollars per share)                       $ 3.78    
Period to measure the average adjusted value of the common shares                 30 days         24 months
Award vesting period                 1 year       1 year 3 years
Number of common shares issued for each award upon vesting                     1      
Maximum period allowed to meet the vesting terms                 36 months          
Percentage of awards vested in three years                           40.00%
Percentage of awards vested based on the performance                           60.00%
Performance of share price, lower threshold                           0
Performance of share price, upper threshold                           100
Percentage to determine the benchmark of share price                           20.00%
Percentage of performance equal to the benchmark                           50.00%