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Long-term Contracts (Tables)
12 Months Ended
Dec. 31, 2018
Long-term Contracts Tables  
Long-term Contracts (Tables)

The following table summarizes the costs incurred on our revenue contracts (in thousands):

      December 31,
      2018     2017
Costs and estimated earnings incurred on uncompleted contracts   $ 12,087    $ 4,680 
Billings on uncompleted contracts     (11,100)     (4,005)
    $ 987    $ 675 
             
Included in consolidated balance sheets under the following captions:            
Costs and estimated earnings incurred on uncompleted contracts   $ 987    $ 680 
Billings on uncompleted contracts in excess of related costs         (5)
    $ 987    $ 675