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Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]  
Future minimum rental payments
    (Thousands)
Year Ending December 31,      
2013 remaining payments   $ 101  
2014     387  
2015     390  
2016     397  
2017     408  
Thereafter     832  
         
Total   $ 2,515  
Future minimum lease payments
    (Thousands)  
Year Ending December 31,        
2013 remaining payments   $ 21  
2014     80  
2015     81  
2016     22  
Total minimum lease payments     204  
Amount representing interest     (17)  
         
Present value of minimum lease payments     187  
Less current portion     78  
         
Noncurrent portion   $ 109