Note 17 - Employee Benefit Plans - Net Periodic Benefit Cost (Details) - Foreign Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Service cost	$ 1,112	$ 1,628	$ 1,032
Interest cost	5,467	5,559	6,580
Expected return on plan assets	(6,234)	(6,496)	(7,553)
Amortization of prior service cost	(27)	(34)	33
Amortization of net actuarial (gains)/losses	1,394	1,287	1,076
Net periodic benefit cost	$ 1,712	$ 1,944	$ 1,168