DEBT AND LINES OF CREDIT (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2014	Dec. 28, 2013
Debts and Lines of credit
Current portion of long-term debt	$ 3,365	$ 3,580
Total short-term borrowings	4,991	4,861
Japanese revolving lines of credit
Debts and Lines of credit
Total short-term borrowings	681	666
Japanese receivables financing facilities
Debts and Lines of credit
Total short-term borrowings	$ 945	$ 615