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Capital Lease Obligations - Components of Capital Lease Obligations (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Leases [Abstract]
Capital lease for equipment	$ 586	$ 674
Less: Current portion of capital lease obligations	89	87
Capital lease obligations, less current portion	$ 497	$ 587

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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