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Concentration of Risk and Geographic Segment Data (Details Textual) (USD $)
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3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 29, 2012
customer
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Sep. 24, 2011
customer
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Sep. 29, 2012
customer
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Sep. 24, 2011
customer
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Sep. 29, 2012
Concentration of Risk, Customer One [Member]
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Sep. 24, 2011
Concentration of Risk, Customer One [Member]
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Sep. 29, 2012
Concentration of Risk, Customer One [Member]
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Sep. 24, 2011
Concentration of Risk, Customer One [Member]
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Dec. 31, 2011
Concentration of Risk, Customer One [Member]
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Sep. 29, 2012
Concentration of Risk, Customer Two [Member]
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Sep. 24, 2011
Concentration of Risk, Customer Two [Member]
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Sep. 29, 2012
Concentration of Risk, Customer Two [Member]
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Sep. 24, 2011
Concentration of Risk, Customer Two [Member]
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Dec. 31, 2011
Concentration of Risk, Customer Two [Member]
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Sep. 29, 2012
Geographic Concentration Risk, Outside North America [Member]
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Sep. 24, 2011
Geographic Concentration Risk, Outside North America [Member]
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Jun. 25, 2011
Geographic Concentration Risk, Outside North America [Member]
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Jun. 25, 2011
Geographic Concentration Risk, Outside North America [Member]
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Sep. 29, 2012
Geographic Concentration Risk, Outside North America [Member]
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Sep. 24, 2011
Geographic Concentration Risk, Outside North America [Member]
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Sep. 29, 2012
Maximum [Member]
Concentration of Risk, Other Customer [Member]
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Sep. 29, 2012
Maximum [Member]
Concentration of Risk, Other Customer [Member]
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Sep. 29, 2012
Maximum [Member]
Geographic Concentration Risk, United States [Member]
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Sep. 29, 2012
Maximum [Member]
Geographic Concentration Risk, United States [Member]
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| Concentration Risk (Textual) [Abstract] | ||||||||||||||||||||||||
| Percentage of net sales | 15.00% | 13.00% | 15.00% | 13.00% | 12.00% | 8.00% | 11.00% | 9.00% | 32.00% | 32.00% | 34.00% | 32.00% | 32.00% | 32.00% | 10.00% | 10.00% | 10.00% | 10.00% | ||||||
| Accounts receivable | $ 1,556,000 | $ 1,556,000 | $ 1,641,000 | $ 2,923,000 | $ 2,923,000 | $ 2,252,000 | ||||||||||||||||||
| Number of customers bearing more than 10% of net sales | 0 | 0 | 0 | 0 | ||||||||||||||||||||