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Future Minimum Lease Payments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Operating
2012	$ 556
2013	465
2014	267
Total	1,288
Capital
2012	7
2013	7
2014	7
Total	21
Less: amount representing interest	2
Total principal obligations	19
Less: current portion	6
Long-term capital lease	$ 13

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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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