Annual report pursuant to Section 13 and 15(d)

Accounts Receivable - Schedule of Accounts Receivable (Details)

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Accounts Receivable - Schedule of Accounts Receivable (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Receivables [Abstract]    
Uncompleted contracts $ 44,227 $ 36,464
Completed contracts 13,184 13,865
Unbilled receivable 16,957 12,040
Allowance for doubtful accounts (320) (670)
Accounts receivable, net $ 74,048 $ 61,699