Certain Significant Estimates (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Warranty Reserves [Member]
Beginning balance	$ 869	$ 656	$ 737
Additions	1,524	1,087	357
Deductions	(1,085)	(874)	(438)
Ending balance	1,308	869	656
Inventory Valuation Reserve [Member]
Beginning balance	1,556	1,839	3,152
Additions	929	458	189
Deductions	(385)	(741)	(1,502)
Ending balance	2,100	1,556	1,839
Allowance for Doubtful Accounts [Member]
Beginning balance	938	1,204	1,485
Additions	450	1,125	654
Deductions	(292)	(1,391)	(935)
Ending balance	1,096	938	1,204
Reserve for Customer Deductions [Member]
Beginning balance	2,605	2,398	2,749
Additions	6,712	5,762	5,046
Deductions	(6,636)	(5,555)	(5,397)
Ending balance	$ 2,681	$ 2,605	$ 2,398

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690

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- Definition

Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

+ References

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- Definition

Total increases or decreases in allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690

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