Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2024	Jan. 01, 2024	Dec. 31, 2023	Jan. 02, 2023	Jan. 01, 2018	Dec. 31, 2017
Deferred Tax Assets, Valuation Allowance	$ 57,742		$ 56,783
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	100			$ 100
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	2,700	$ 0
Domestic Tax Jurisdiction [Member]
Operating Loss Carryforwards	170,300				$ 66,800	$ 103,500
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	96,300
Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Capitalized	10,100
Research Tax Credit Carryforward [Member] | Domestic Tax Jurisdiction [Member]
Tax Credit Carryforward, Amount	5,200
Research Tax Credit Carryforward [Member] | State and Local Jurisdiction [Member]
Tax Credit Carryforward, Amount	$ 5,700