Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016		Jan. 02, 2016		Jan. 03, 2015		Dec. 28, 2013
Valuation and Qualifying Accounts [Abstract]
Revenue Recognition, Sales Returns Reserve Liability		$ (1,358)		$ (1,333)		$ (1,169)		$ (1,570)
Valuation Allowances and Reserves, Balance		6,024		6,209		6,807		3,884
Valuation Allowances and Reserves, Recoveries		0		143	[1]	2,923	[1]
Valuation Allowances and Reserves, Deductions		185	[2]	741		0	[2]
Revenue Recognition, Sales Returns, Reserve for Sales Returns	[3]	(1,864)		(1,833)		(1,637)
Additions for Doubtful Accounts	[4]	(191)		(174)		(307)
Allowance for Doubtful Accounts Receivable, Current		(268)		(265)		(247)		$ (243)
Allowance for Doubtful Accounts Receivable, Write-offs	[5]	188		156		303
Revenue Recognition, Sales Return Reserve Write-off	[6]	$ 1,839		$ 1,669		$ 2,038

[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 realized.