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Cash, Cash Equivalents and Short-Term Investments (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 29, 2012
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Dec. 31, 2011
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Oct. 01, 2011
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Dec. 31, 2010
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|---|---|---|---|---|
| Cash, Cash Equivalents and Short-Term Investments | ||||
| Cash and cash equivalents | $ 2,727 | $ 6,211 | $ 3,445 | $ 3,548 |
| Short-term investments | 2,873 | 2,957 | ||
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Commercial Paper
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| Cash, Cash Equivalents and Short-Term Investments | ||||
| Short-term investments | 750 | |||
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Corporate Debt
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| Cash, Cash Equivalents and Short-Term Investments | ||||
| Short-term investments | 1,787 | 2,621 | ||
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Bank certificate of deposit
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| Cash, Cash Equivalents and Short-Term Investments | ||||
| Short-term investments | 100 | 100 | ||
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Cash
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| Cash, Cash Equivalents and Short-Term Investments | ||||
| Cash and cash equivalents | 490 | 571 | ||
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Money market funds
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| Cash, Cash Equivalents and Short-Term Investments | ||||
| Cash and cash equivalents | 2,237 | 5,640 | ||
| Short-term investments | $ 236 | $ 236 |