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Short Term Debt (Tables)
 3 Months Ended
Mar. 31, 2013
Debt Disclosure [Abstract]  
Short Term Debt Total
   
  (in thousands)  
  UBS short-term credit line  
      Beginning balance December 31, 2012 $ 1,500 
        Borrowing 900 
        Repayments   (900)
      Ending balance March 31, 2013 $1,500 
Short Term Debt Three Months
(in thousands)

Three months ended

March 31,

  2013 2012
Interest UBS short-term credit line $ 8  $13 
Interest RBC short-term margin loan   -    4 
   Total interest, short-term margin loans $ 8  $17