Note 13 - Restructuring and Asset Impairment Charges - Restructuring Activities (Details) - Restructuring Charge 2014 [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Apr. 02, 2017	Jan. 01, 2017	Oct. 01, 2017	Oct. 01, 2017
Total restructuring charge	$ 7,300	$ 19,800
Employee Severance [Member]
Total restructuring charge	600			$ 10,652
Cost incurred		1,451	$ 6,537
Balance			2,664	2,664
Fixed Asset Impairment [Member]
Total restructuring charge	3,300			11,319
Cost incurred		8,019	3,300
Balance			0	0
Other Restructuring [Member]
Total restructuring charge	$ 3,400			5,116
Cost incurred		$ 27	5,027
Balance			$ 62	$ 62