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Accounts Payable and Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Payables and Accruals [Abstract]
Accrued expenses	$ 14,162	$ 4,084
Accounts payable	2,118	1,179
Accrued payroll liabilities	1,766	703
Warranty reserves (Note 2)	608	141	102
Total liabilities	$ 18,654	$ 6,107

Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations.

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