Summary of Significant Accounting Policies Accounts Receivable (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015		Dec. 28, 2013		Dec. 29, 2012
Accounting Policies [Abstract]
Allowance for Doubtful Accounts Receivable, Period Start	$ (243)		$ 277		$ 301
Additions for Doubtful Accounts	(307)	[1]	(325)	[1]	(788)	[1]
Allowance for Doubtful Accounts Receivable, Write-offs	303	[2]	359	[2]	812	[2]
Allowance for Doubtful Accounts Receivable, Period End	$ (247)		$ (243)		$ 277

[1] Allowance for doubtful accounts are charged to expenses.

[2] Represents uncollectible accounts written off against the allowance for doubtful accounts.