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Accrued Expenses Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | ---
Payables and Accruals [Abstract] |  |
Payroll taxes | $ 1,786 | $ 1,234
Payroll | 2,075 | 3,708
Bonuses | 2,736 | 2,387
Commissions | 912 | 818
Vacation | 4,362 | 3,792
Royalties | 1,310 | 1,104
Value-Added Tax | 1,018 | 874
Other Accrued Liabilities, Current | 5,998 | 4,973
Total | $ 20,197 | $ 18,890

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