Summary of Significant Accounting Policies (Cash, Cash Equivalents and Investments) (Details) - USD ($) $ in Thousands	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Schedule of Cash, Cash Equivalents and Investments [Line Items]
Cash and cash equivalents	$ 28,548	$ 34,144	$ 65,030	$ 41,782
Short-term investments	4,252	3,052
Long-term investments	8,067	9,240
Certificates of Deposit [Member]
Schedule of Cash, Cash Equivalents and Investments [Line Items]
Cash and cash equivalents	0	0
Short-term investments	252	252
Long-term investments	0	0
Debt Securities [Member]
Schedule of Cash, Cash Equivalents and Investments [Line Items]
Cash and cash equivalents	0	0
Short-term investments	4,000	2,800
Long-term investments	8,067	9,240
Cash and Money Markets Accounts [Member]
Schedule of Cash, Cash Equivalents and Investments [Line Items]
Cash and cash equivalents	28,548	34,144
Short-term investments	0	0
Long-term investments	$ 0	$ 0