Accounts Receivable (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 28, 2013
Accounts Receivable (Additional Textual) [Abstract]
Sold receivables amount	$ 1,300,000	$ 600,000	$ 2,900,000	$ 5,200,000
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			1.19%
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Administrative fees as well as interest percent			1.68%