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Fair Value of Financial Instruments - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified |
Sep. 29, 2012
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Jun. 30, 2012
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|---|---|---|
| Fair Value Measurements Of Financial Instruments [Line Items] | ||
| Short-term investments | $ 7,965 | $ 25,599 |
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Portfolio [Member]
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| Fair Value Measurements Of Financial Instruments [Line Items] | ||
| Short-term investments | $ 7,965 |