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Commitments and Contingencies Royalties (Details) (USD $)
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12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Royalties [Abstract] | |||
| Royalty Expense | $ 470,000 | $ 508,000 | $ 532,000 |