Note 11 - Stock-Based Compensation Plans - Assumptions Used at Grant Date In the Valuation of RUSs (Details) - Restricted Stock Units (RSUs) [Member]	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Weighted average expected volatility		42.38%
Weighted average risk-free interest rate		1.40%
Expected term (years) (Year)		3 years	3 years
Minimum [Member]
Weighted average expected volatility	50.37%	40.15%
Weighted average risk-free interest rate	0.22%	1.66%
Expected term (years) (Year)	3 years
Maximum [Member]
Weighted average expected volatility	52.11%		41.10%
Weighted average risk-free interest rate	0.77%		2.55%
Expected term (years) (Year)	5 years