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Note 12 - Stock-Based Compensation - Schedule of Weighted Average Assumptions (Details) - $ / shares
12 Months Ended
Jan. 01, 2023
Jan. 02, 2022
Jan. 03, 2021
Expected life (months) (Month) 6 months 6 months 6 months
Risk-free interest rate 3.04% 0.05% 0.12%
Volatility 57.00% 74.00% 82.00%
Dividend yield 0.00% 0.00% 0.00%
Employee Stock Purchase Plan [Member]      
Weighted average fair value of ESPP options granted (in dollars per share) $ 2.04 $ 2.18 $ 1.09