Note 7 - Stock-based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Jan. 01, 2022	Oct. 02, 2021
Options outstanding, balance (in shares)	428
Weighted average exercise price per share (in dollars per share)	$ 27.73
Options outstanding, exercised (in shares)	(10)
Weighted average exercise price per share, exercised (in dollars per share)	$ 19.14
Aggregate intrinsic value, exercised	$ 254
Options outstanding, forfeited (in shares)	(60)
Weighted average exercise price per share, forfeited (in dollars per share)	$ 29.29
Options outstanding, balance (in shares)	358	428
Weighted average exercise price per share (in dollars per share)	$ 27.73	$ 27.73
Contractual term - weighted average, balance (Year)	7 years 4 months 24 days
Options outstanding, vested and anticipated to vest in future (in shares)	345
Weighted average exercise price per share, vested and anticipated to vest in futur (in dollars per share)	$ 27.70
Contractual term - weighted average, vested and anticipated to vest in future (Year)	7 years 4 months 24 days
Aggregate intrinsic value, vested and anticipated to vest in future	$ 4,293
Options outstanding, exercisable (in shares)	175
Weighted average exercise price per share, exercisable (in dollars per share)	$ 29.19
Contractual term - weighted average, exercisable (Year)	6 years 2 months 12 days
Aggregate intrinsic value, exercisable	$ 1,915
Minimum [Member]
Exercise price per share, balance, lower (in dollars per share)	$ 18.05	17.22
Exercise price per share, exercised, lower (in dollars per share)	17.22
Exercise price per share, forfeited, lower (in dollars per share)	21.57
Maximum [Member]
Exercise price per share, balance, upper (in dollars per share)	41.87	$ 41.87
Exercise price per share, exercised, upper (in dollars per share)	20.50
Exercise price per share, forfeited, upper (in dollars per share)	$ 41.85