Related Party Transactions (Details) (USD $)	9 Months Ended			9 Months Ended		9 Months Ended	0 Months Ended
	Nov. 01, 2014	Nov. 02, 2013	Jan. 02, 2011 Comcast [Member]	Nov. 01, 2014 GE [Member] board_members	Jan. 02, 2011 GE [Member]	Nov. 01, 2014 NBCU [Member]	Nov. 17, 2014 Significant Acquisitions and Disposals, Transaction [Domain]
Related Party Transaction [Line Items]
Stock Issued During Period, Value, Acquisitions							$ 1,044,000
Equity Method Investment, Ownership Percentage in NBCU			51.00%		49.00%
Current Fiscal Year End Date	--01-31
Common Stock Shares Held in Subsidiary				4,619,949		7,141,849
Number of Members Related Party Entitled to Appoint to Board of Directors				2
Minimum Beneficial Ownership to Retain Board Seat						5.00%
Stock Issued During Period, Shares, Acquisitions							178,842
Payments to Acquire Intangible Assets	$ 0	$ 2,830,000					$ 20,000