Note 10 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 29, 2024	Dec. 31, 2023
Net operating losses	$ 42,488	$ 42,220
Accruals and reserves	1,232	1,569
Credits carryforward	7,342	6,730
Depreciation and amortization	6,086	5,841
Stock-based compensation	601	447
Operating lease liability	165	216
Gross deferred tax assets	57,914	57,023
Right-of-use asset	(172)	(215)
Withholding tax on future distribution	(125)	(125)
Gross deferred tax liabilities	(297)	(340)
Net deferred tax assets	57,617	56,683
Valuation allowance	(57,742)	(56,783)
Total deferred tax liability	$ (125)	$ (100)