Note 9 - Fair Value of Assets and Liabilities (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Long-term Debt	$ 454,142	$ 170,753
Euro Senior Notes, Series A [Member]
Long-term Debt	122,300
Euro Senior Notes, Series B [Member]
Long-term Debt	99,300
Fair Value, Inputs, Level 2 [Member] | Euro Senior Notes, Series A [Member]
Long-term Debt, Fair Value	122,600
Fair Value, Inputs, Level 2 [Member] | Euro Senior Notes, Series B [Member]
Long-term Debt, Fair Value	$ 99,200