Certain Significant Estimates (Tables)

12 Months Ended

Dec. 28, 2013

Product Warranty [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

Valuation and Qualifying Accounts [Table Text Block]

Changes in product warranty were as follows:

In Thousands	2013		2012		2011
Beginning balance	$	1,308	$	869	$	656
Additions		1,045		1,524		1,087
Deductions		(1,378)		(1,085)		(874)
Ending balance	$	975	$	1,308	$	869

Inventory Valuation Reserves [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

Valuation and Qualifying Accounts [Table Text Block]

Changes in inventory valuation reserves were as follows:

In Thousands	2013		2012		2011
Beginning balance	$	2,100	$	1,556	$	1,839
Additions		1,019		929		458
Deductions		(1,008)		(385)		(741)
Ending balance	$	2,111	$	2,100	$	1,556

Allowance for Doubtful Accounts [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

Valuation and Qualifying Accounts [Table Text Block]

Changes in allowance for doubtful accounts were as follows:

In Thousands	2013		2012		2011
Beginning balance	$	1,096	$	938	$	1,204
Additions		639		450		1,125
Deductions		(414)		(292)		(1,391)
Ending balance	$	1,321	$	1,096	$	938

Customer Allowances [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

Valuation and Qualifying Accounts [Table Text Block]

Changes in customer allowances were as follows:

In Thousands	2013		2012		2011
Beginning balance	$	2,681	$	2,605	$	2,398
Additions		6,363		6,712		5,762
Deductions		(5,759)		(6,636)		(5,555)
Ending balance	$	3,285	$	2,681	$	2,605