Accounts Receivable (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013
Accounts Receivable (Additional Textual) [Abstract]
Sold receivables amount	$ 1,000,000	$ 3,200,000	$ 1,500,000	$ 4,600,000
Amounts due from financial institutions	$ 0		$ 0		$ 0
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Administrative fees as well as interest percent			1.23%
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Administrative fees as well as interest percent			1.68%