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Accounts and Unbilled Receivables
12 Months Ended
Dec. 31, 2017
Receivables [Abstract]  
Accounts and Unbilled Receivables
Accounts and Unbilled Receivables

 
December 31, 2017 (in thousands)
Accounts receivable
$
5,418

Unbilled receivables
2,504

 
 
 
$
7,922



As of December 31, 2017, management has determined no allowance for doubtful accounts is necessary.