Debt and Capital Lease Obligations - Summary of Outstanding Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Master lease agreements	$ 5,370	$ 5,589
Other	215	166
Debt and capital lease obligation	9,456	10,912
Current portion of long-term debt and capital lease obligations	5,717	6,850
Long-term debt, less current portion	3,739	4,062
Supplies Distributors
Debt Instrument [Line Items]
Loan and security agreements	2,167	3,267
PFS
Debt Instrument [Line Items]
Loan and security agreements	$ 1,704	$ 1,890

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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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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Including both current and noncurrent portions, carrying amount as of the balance sheet date of other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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