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Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Payables And Accruals [Abstract]    
Trade accounts payable, including due to subcontractors $ 23,108 $ 11,098
Compensation and related benefits 2,412 1,211
Accrued interest 399 219
Current portion of Earn -Out Liability 1,812  
Accrued warranty 1,107 531
Other accrued expenses 5,518 2,034
Accounts payable and accrued expenses $ 34,356 $ 15,093