Note 10 - Stock-Based Compensation Plans - Assumptions Used at Grant Date In the Valuation of RUSs (Details) - Restricted Stock Units (RSUs) [Member]	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Weighted average expected volatility			51.44%
Weighted average risk-free interest rate			1.67%
Expected term (years) (Year)		3 years	3 years
Minimum [Member]
Weighted average expected volatility	51.04%	50.97%
Weighted average risk-free interest rate	3.39%	4.28%
Expected term (years) (Year)	3 years
Maximum [Member]
Weighted average expected volatility	53.96%	54.31%
Weighted average risk-free interest rate	4.53%	4.59%
Expected term (years) (Year)	6 years