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Accrued Expenses and Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Accrued expenses and other current liabilities	$ 4,050	$ 3,310
Accrued royalties	853	1,453
Accrued compensation and benefits	2,897	3,059
Restructuring liabilities	2,099	2,016
Deferred revenue	23	425
Total accrued expenses and other current liabilities	$ 9,922	$ 10,263

Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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