Organization and Summary of Significant Accounting Policies (Details Textuals)	3 Months Ended
	Mar. 31, 2013 Week	Apr. 01, 2012 Week	Dec. 30, 2012
Organization and Presentation
Exchange rate used to translate Japanese yen to U.S. dollar	94.11	82.25	85.99
Number of Weeks in Fiscal Quarter	13	13