Note 13 - Taxes on Income - Net Deferred Tax Asset (Details) - USD ($) $ in Thousands	Jan. 01, 2017	Jan. 03, 2016
Basis differences of property and equipment, assets	$ 0	$ 0
Basis differences of property and equipment, liabilities	14,419	16,254
Basis difference of intangible assets, assets	978	0
Basis difference of intangible assets, liabilities	0	368
Foreign currency, assets	0	0
Foreign currency, liabilities	3,216	5,375
Net operating loss carryforwards, assets	3,627	5,575
Net operating loss carryforwards, liabilities	0	0
Valuation allowances on net operating loss carryforwards, assets	(2,500)	(4,457)
Valuation allowances on net operating loss carryforwards, liabilities	0	0
Federal tax credits, assets	5,711	4,580
Federal tax credits, liabilities	0	0
Deferred compensation, assets	26,546	26,352
Deferred compensation, liabilities	0	0
Basis difference of inventory, assets	4,009	2,390
Basis difference of inventory, liabilities	0	0
Basis difference of prepaids, accruals and reserves, assets	6,273	6,556
Basis difference of prepaids, accruals and reserves, liabilities	0	0
Pensions, assets	3,435	1,075
Pensions, liabilities	0	0
Undistributed earnings from foreign subsidiaries not deemed to be indefinitely reinvested, assets	0	0
Undistributed earnings from foreign subsidiaries not deemed to be indefinitely reinvested, liabilities	1,704	1,226
Basis difference of other assets and liabilities, assets	0	0
Basis difference of other assets and liabilities, liabilities	351	517
Deferred tax assets	48,079	42,071
Deferred tax liabilities	$ 19,690	$ 23,740