Annual report pursuant to Section 13 and 15(d)

Receivables

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Receivables
 12 Months Ended
Dec. 31, 2013
Receivables [Abstract]  
Receivables
(2)  Receivables

The components of receivables as of December 31, 2013 and 2012 were as follows (in thousands):

 
  
2013
    
2012
  
Billed
  
$
36,703
    
$
41,078
  
Unbilled (principally December work billed in January)
    
41,684
      
49,543
  
   Total receivables, net
  
$
78,387
    
$
90,621
  

The unbilled balance includes certain costs for work performed at risk but which we believe will be funded by the government totaling approximately $5 million and $7.1 million as of December 31, 2013, and 2012, respectively. We expect to invoice substantially all unbilled receivables during 2014.