DEBT AND LINES OF CREDIT (Details) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Dec. 28, 2013
Debt and Lines of Credit
Current portion of long-term debt	$ 825	$ 3,580
Total short-term borrowings	2,180	4,861
Japanese revolving lines of credit
Debt and Lines of Credit
Total short-term borrowings	640	666
Japanese receivables financing facilities
Debt and Lines of Credit
Total short-term borrowings	$ 715	$ 615