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Component of Capital Lease Obligations (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Capital Leased Assets [Line Items]
Short-term capital lease obligations	$ 43
Long-term capital lease obligations	30
Total capital lease obligations	$ 73

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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