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Short-Term Debt (Tables)
 6 Months Ended
Jun. 30, 2013
Debt Disclosure [Abstract]  
Short Term Debt Summary
  (in thousands)  
  UBS short-term credit line  
      Beginning balance December 31, 2012 $ 1,500 
        Borrowing 1,100 
        Repayments, net of interest charges   (1,482)
      Ending balance June 30, 2013 $1,118 
Detail Short Term Debt
(in thousands)

Three months ended

June 30,

Six months ended

June 30,

  2013 2012 2013 2012
Interest UBS short-term credit line $ 8  $13  $ 16  $24 
Interest RBC short-term margin loan   -    11    -    15 
   Total interest, short-term margin loans $ 8  $24  $ 16  $39