Note 3 - Goodwill and Purchased Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Accumulated Amortization	$ 35,203	$ 18,464
Gross Carrying Amount, finite-lived and indefinite-lived intangible assets	317,857	35,212
Developed Technology Rights [Member]
Gross Carrying Amount, finite-lived intangible assets	214,266	20,780
Accumulated Amortization	$ 21,197	12,623
Remaining Useful Life (Year)	7 years 146 days
Customer Relationships [Member]
Gross Carrying Amount, finite-lived intangible assets	$ 73,104	7,934
Accumulated Amortization	$ 7,378	4,838
Remaining Useful Life (Year)	10 years 36 days
Trade Names [Member]
Gross Carrying Amount, finite-lived intangible assets	$ 22,701	6,185
Accumulated Amortization	$ 1,807	972
Remaining Useful Life (Year)	10 years 182 days
Order or Production Backlog [Member]
Gross Carrying Amount, finite-lived intangible assets	$ 6,372
Accumulated Amortization	$ 4,696
Remaining Useful Life (Year)	182 days
Off-Market Favorable Lease [Member]
Gross Carrying Amount, finite-lived intangible assets	$ 1,100
Accumulated Amortization	$ 62
Remaining Useful Life (Year)	5 years 109 days
Noncompete Agreements [Member]
Gross Carrying Amount, finite-lived intangible assets	$ 314	313
Accumulated Amortization	$ 63	$ 31
Remaining Useful Life (Year)	8 years