Future Minimum Annual Rental Commitments under Capital Leases (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Future Minimum Annual Rental Commitments under Capital Leases [Abstract]
Year 2013	$ 27
Year 2014	14
Year 2015	7
Year 2016	7
Year 2017	2
Total minimum lease payments, including interest	57
Amounts representing interest	(4)
Total minimumlease payments, net of interest	53
Current portion	26
Noncurrent portion	$ 27

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 within one year (or one operating cycle, if longer) of the balance sheet date.

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Amount of minimum lease payments for capital leases.

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Amount of minimum lease payments maturing in the next fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the fifth fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the forth fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the third fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the second fiscal year following the latest fiscal year for capital leases.

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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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Amount of minimum lease payments for capital leases net of executory costs, which include amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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