Note 13 - Stock-Based Compensation - Stock Options Activity (Details) - USD ($)	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Balance (in shares)	186,000	229,000	254,000
Weighted average price balance (in dollars per share)	$ 32.09	$ 30.52	$ 29.26
Weighted average remaining, balance (Year)	3 years 9 months	3 years 3 months 25 days	3 years 8 months 12 days	4 years 4 months 2 days
Options granted (in shares)	0	0	0
Weighted average price, granted (in dollars per share)	$ 0	$ 0	$ 0
Forfeited or expired (in shares)	(65,000)	(42,000)	(10,000)
Weighted average price, forfeited or expired (in dollars per share)	$ 38.83	$ 24.14	$ 25.20
Exercised, options (in shares)	0	(1,000)	(15,000)
Weighted average price, exercised (in dollars per share)	$ 0	$ 10.92	$ 12.60
Balance (in shares)	121,000	186,000	229,000	254,000
Weighted average price balance (in dollars per share)	$ 28.46	$ 32.09	$ 30.52	$ 29.26
Aggregate intrinsic value, balance	$ 0
Exercisable and Vested and expected to vest, options (in shares)	121
Weighted average price, exercisable and Vested and expected to vest (in dollars per share)	$ 28.46
Weighted average remaining, exercisable and Vested and expected to vest (Year)	3 years 9 months
Aggregate intrinsic value, exercisable and Vested and expected to vest	$ 0