Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Payables And Accruals [Abstract]
Trade accounts payable, including due to subcontractors	$ 19,490	$ 23,108
Compensation and related benefits	1,505	2,412
Accrued interest	170	399
Current portion of earn-out liability	1,050	1,812
Accrued warranty	1,232	1,107
Other accrued expenses	3,110	5,518
Accounts payable and accrued expenses	$ 26,557	$ 34,356