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Prepaid Expenses and Other Assets
 9 Months Ended
Sep. 30, 2019
Text Block [Abstract]  
Prepaid Expenses and Other Assets
6.
PREPAID EXPENSES AND OTHER ASSETS
Prepaid expenses and other assets consist of the following (in thousands):
                 
 
September 30,
2019
   
December 31,
2018
 
Prepaid expenses
  $
5,385
    $
3,390
 
Revenues in excess of billings
   
4,850
     
7,987
 
Contract retainage
   
2,426
     
2,469
 
Income tax receivable
   
291
     
471
 
Other
   
302
     
1,245
 
                 
Total prepaid expenses and other assets
  $
  13,254
    $
15,562