Note 11 - Stock-Based Compensation Plans (Details Textual) $ / shares in Units, $ in Thousands, shares in Millions		1 Months Ended	3 Months Ended					12 Months Ended
	May 31, 2012 shares	May 31, 2012 shares	Apr. 03, 2021	Sep. 26, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020 USD ($)	Jan. 01, 2022 USD ($) $ / shares shares	Jan. 02, 2021 USD ($) $ / shares	Dec. 28, 2019 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)								4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares								$ 13,040,000.00	$ 6,620,000	$ 1,690,000
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount								$ 0
Share-based Payment Arrangement, Expense								46,475	$ 40,372	$ 18,899
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value								44,700	21,500	17,800
Awards with Market Condition or Performance Condition [Member]
Share-based Payment Arrangement, Expense								1,200	1,000	500
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Expense								$ 1,000	2,000	2,400
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares								$ 56.29
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount								$ 25,300
Share-based Payment Arrangement, Expense							$ 1,800
Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			3 years
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount								62,400
Share-based Payment Arrangement, Expense								21,700	$ 16,600	10,300
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Of Grants Tested Each Year			50.00%
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Of Market Condition Achieved			75.00%
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions			100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Of Market Condition Achieved			55.00%
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Share-based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Of Market Condition Achieved			25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			0.00%
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions			250.00%
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Minimum [Member] | TSR Relative To PHLX Semiconductor Sector Index, 75th Percentile [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions			250.00%
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Minimum [Member] | Share-based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Of Market Condition Achieved			25.00%
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions			200.00%
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Maximum [Member] | TSR Relative To PHLX Semiconductor Sector Index, 75th Percentile [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions			200.00%
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Maximum [Member] | Share-based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Of Market Condition Achieved			75.00%
Performance Shares [Member] | Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions			200.00%
Performance Shares [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)									3 years
Share-based Payment Arrangement, Expense								$ 22,100	$ 20,800	$ 5,700
Performance Shares [Member] | Executive Officer [Member] | TSR Relative To PHLX Semiconductor Sector Index, 75th Percentile [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions									100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Of Market Condition Achieved									50.00%
Performance Shares [Member] | Executive Officer [Member] | TSR Relative To PHLX Semiconductor Sector Index, 25th Percentile [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions									0.00%
Performance Shares [Member] | Executive Officer [Member] | Minimum [Member] | TSR Relative To PHLX Semiconductor Sector Index, 75th Percentile [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions									250.00%
Performance Shares [Member] | Executive Officer [Member] | Maximum [Member] | TSR Relative To PHLX Semiconductor Sector Index, 75th Percentile [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions									200.00%
Performance Shares Granted in 2018 [Member] | Executive Officer [Member] | Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions						33.30%	200.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Of Market Condition Achieved					75.00%		75.00%
Performance Shares Granted in 2018 [Member] | Executive Officer [Member] | Minimum [Member] | Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions				250.00%
Performance Shares Granted in 2018 [Member] | Executive Officer [Member] | Maximum [Member] | Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Based on Market Conditions				200.00%
The2012 ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) | shares	3.0	3.0
Share-based Compensation Arrangement By Share-based Payment Award, Maximum, Annual Contribution Per Employee, Percent	10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent		85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) | shares								1.1
The 2013 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) | shares								7.5
Share-based Compensation Arrangement by Share-based Payment Award, Share Ratio								2.2
Share-based Compensation Arrangement by Share-based Payment Award, Number Of Shares, Transferred Out (in shares) | shares								2.3