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Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Payables And Accruals [Abstract]    
Trade accounts payable, including due to subcontractors $ 53,315 $ 51,984
Compensation and related benefits 5,375 7,578
Short-term lease liabilities 2,939  
Accrued warranty 3,509 3,384
Contract liabilities 5,982 6,541
Other accrued expenses 8,081 10,742
Total accounts payable and accrued expenses $ 79,201 $ 80,229