Note 12 - Income Taxes (Details Textual) - USD ($) $ in Thousands			12 Months Ended
	Dec. 28, 2018	Dec. 29, 2017	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018	Dec. 31, 2017	Dec. 30, 2017
Undistributed Earnings of Foreign Subsidiaries			$ 3,100
Unrecognized Tax Benefits, Ending Balance		$ 44,832	55,737	$ 56,962	$ 58,285	$ 58,377	$ 58,377
Unrecognized Tax Benefits that Would Impact Effective Tax Rate			53,600
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total			9,100
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions		$ 19	628	1,084	$ 759
Unrecognized Tax Benefits, Increase Resulting from Acquisition	$ 334			1,084
Liability for Uncertainty in Income Taxes, Current			42,500
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit			2,700
Significant Change in Unrecognized Tax Benefits Is Reasonably Possible, Amount of Associated Income, Tax Penalties and Interest Accrued			400
Decrease in Unrecognized Tax Benefits is Reasonably Possible			3,100
Other Noncurrent Liabilities [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total			22,300	$ 24,600
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total			359,500
Tax Credit Carryforward, Amount			$ 51,700
Open Tax Year			2017
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total			$ 147,600
Tax Credit Carryforward, Amount			$ 64,900
Open Tax Year			2016
State and Local Jurisdiction [Member] | Non Expiration [Member]
Tax Credit Carryforward, Amount			$ 64,500
Foreign Tax Authority [Member]
Open Tax Year			2013
Foreign Tax Authority [Member] | Philippines Tax Authority [Member]
Income Tax Examination, Year under Examination			2016 2017
Foreign Tax Authority [Member] | Israel Tax Authority [Member]
Income Tax Examination, Year under Examination			2013 2014 2015 2016 2017