Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015		Dec. 28, 2013		Dec. 29, 2012		Dec. 31, 2011
Valuation and Qualifying Accounts [Abstract]
Revenue Recognition, Sales Returns Reserve Liability	$ (1,169)		$ (1,570)		$ (1,129)		$ (1,082)
Valuation Allowances and Reserves, Balance	6,807		3,884		1,692		1,692
Valuation Allowances and Reserves, Recoveries	2,923	[1]	2,552	[1]	0
Valuation Allowances and Reserves, Deductions	0		(360)	[2]	0	[2]
Revenue Recognition, Sales Returns, Reserve for Sales Returns	(1,637)	[3]	(2,031)	[3]	(1,702)	[3]
Additions for Doubtful Accounts	(307)	[4]	(325)	[4]	(788)	[4]
Allowance for Doubtful Accounts Receivable, Current	(247)		(243)		277		301
Allowance for Doubtful Accounts Receivable, Write-offs	303	[5]	359	[5]	812	[5]
Revenue Recognition, Sales Return Reserve Write-off	$ 2,038	[6]	$ 1,590	[6]	$ 1,655	[6]

[1] Represents additional valuation allowance against California enterprise zone tax credits for deferred tax allowance of $1.1 million plus additional valuation allowance against Canadian deferred tax assets of $0.8 million.

[2] Represents reduction of state valuation allowance against tax credits.

[3] Represents allowance for sales returns estimated at the time revenue is recognized primarily based on historical returns rates and is charged as a reduction to revenue.

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

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

[6] Represents allowance for sales returns written off.