Annual report pursuant to Section 13 and 15(d)

Receivables, net

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Receivables, net
12 Months Ended
Dec. 31, 2016
Receivables [Abstract]  
Receivables, net
Receivables, net

Total receivables, net of allowance for doubtful accounts of approximately $30 thousand and $100 thousand as of December 31, 2016 and 2015, respectively, were as follows (in thousands):
 
2016
 
2015
Billed
$
55,669

 
$
43,503

Unbilled
45,549

 
34,968

Total receivables
$
101,218

 
$
78,471



The unbilled balance includes certain costs for work performed at risk but which we believe will be funded by the government totaling approximately $2.1 million and $1.5 million as of December 31, 2016 and 2015, respectively. We expect to invoice substantially all unbilled receivables during 2017.