Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 01, 2022	Jan. 02, 2021
Intangible assets	$ 8,236	$ 10,082
Net operating loss carry forwards	88,254	87,443
Tax credit carry forwards	93,095	83,534
Accrued expenses and reserves	6,590	5,464
Stock-based and deferred compensation	4,477	3,851
Other	6,615	9,493
Total deferred tax assets	207,267	199,867
Less: valuation allowance	(200,438)	(192,478)
Net deferred tax assets	6,829	7,389
Fixed assets	2,379	2,809
Unremitted earnings	2,128	1,746
Other	9,969	4,003
Total deferred tax liabilities	14,476	8,558
Net deferred taxes	(7,647)	(1,169)
Deferred tax assets (included in Other long-term assets)	6,829	7,389
Deferred tax liabilities (included in Other long-term liabilities)	(14,476)	(8,558)
Net deferred taxes	(7,647)	(1,169)
Other Noncurrent Assets [Member]
Net deferred tax assets	953	577
Deferred tax assets (included in Other long-term assets)	953	577
Other Noncurrent Liabilities [Member]
Total deferred tax liabilities	8,600	1,746
Deferred tax liabilities (included in Other long-term liabilities)	$ (8,600)	$ (1,746)