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Income Taxes (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2017
Dec. 30, 2016
Jan. 01, 2016
Increase (decrease) in taxes resulting from:      
Computed provision (benefit) for taxes based on income at statutory rate percentage 34.00% 34.00% 34.00%
Permanent differences percentage (0.90%) (3.00%) (0.60%)
Change in the future federal tax rate percentage (832.90%) 0.00% 0.00%
State minimum taxes, net of federal income tax benefit percentage (0.40%) (0.10%) (0.10%)
State tax benefit percentage 8.30% 6.20% (6.60%)
Tax rate difference due to foreign statutory rate percentage (1.20%) (8.90%) 1.60%
Expiration of state net operating tax loss carryforwards percentage (36.50%) (7.20%) (47.30%)
Foreign earnings not permanently reinvested, net of the participation exemption percentage 108.10% 6.50% (9.80%)
Foreign dividend withholding percentage (0.30%) 3.80% (3.80%)
Expiration of charitable contribution carryover percentage 0.00% (0.10%) (0.30%)
Other percentage (2.60%) 1.20% 2.50%
Valuation allowance percentage 731.20% (29.90%) 13.80%
Effective tax provision (benefit) rate percentage 6.80% 2.50% (16.60%)
Increase (decrease) in taxes resulting from:      
Computed provision (benefit) for taxes based on income at statutory rate $ (781) $ (4,231) $ (1,905)
Permanent differences 21 373 33
Change in the future federal tax rate 19,125 0 0
State minimum taxes, net of federal income tax benefit 8 12 8
State tax benefit (190) (767) 370
Tax rate difference due to foreign statutory rate 29 1,109 (90)
Expiration of state net operating tax loss carryforwards 836 892 2,650
Foreign earnings not permanently reinvested, net of the participation exemption (2,482) (809) 547
Foreign dividend withholding 7 (478) 211
Expiration of charitable contribution carryover 0 12 15
Other 59 (151) (140)
Valuation allowance (16,789) 3,723 (771)
Effective tax provision (benefit) rate $ (157) $ (315) $ 928