Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 29, 2012

Summary of Significant Accounting Policies [Abstract]

Estimated useful lives by major asset

Buildings and building improvements	10 to 39 years
Machinery, equipment and tooling	3 to 10 years
Furniture, fixtures and leasehold improvements	3 to 15 years

Activity of Product warranty liability included in other accrued liabilities

(in thousands)	2012			2011			2010
Balance at beginning of year	$	70		$	25		$	169
Provisions for warranty costs		1,064			586			325
Charge-offs		(848	)		(541	)		(469	)
Balance at end of year	$	286		$	70		$	25