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Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Payables and Accruals [Abstract]    
Trade accounts payable, including due to subcontractors $ 34,303 $ 31,882
Compensation and related benefits 2,121 2,976
Accrued interest 38 193
Current portion of earn-out liability 13,205 8,738
Accrued warranty 778 936
Other accrued expenses 6,059 6,737
Accounts payable and accrued expenses $ 56,504 $ 51,462