Note 17 - Employee Benefit Plans - Assumptions Used to Determine Net Periodic (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Foreign Plan [Member]
Discount rate	1.90%	2.00%	2.70%
Expected return on plan assets	1.80%	2.30%	3.10%
Rate of compensation	1.75%	1.75%	2.00%
Discount rate	2.50%	2.20%	2.30%
Rate of compensation	1.75%	1.75%	2.00%
Service cost	$ 1,112	$ 1,628	$ 1,032
Interest cost	5,467	5,559	6,580
Amortizations	1,394	1,287	1,076
Net periodic benefit cost	$ 1,712	$ 1,944	$ 1,168
UNITED STATES
Discount rate	3.50%	3.85%	4.25%
Rate of compensation			4.00%
Discount rate	4.10%	3.50%	3.85%
Rate of compensation			4.00%
Service cost	$ 0	$ 0	$ 440
Interest cost	1,082	1,256	1,269
Amortizations	464	364	811
Net periodic benefit cost	$ 1,546	$ 1,620	$ 2,520