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Future Minimum Lease Payments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Operating
2013	$ 706
2014	384
2015
Total	1,090
Capital
2013	4
2014	4
2015	3
Total	11
Less: interest
Total principal obligations	11
Less: current portion	4
Long-term capital lease	$ 7

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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.

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