Note 7 - Stock-based Compensation - RSU Activity (Details) - Restricted Stock Units (RSUs) [Member] shares in Thousands	6 Months Ended
	Apr. 02, 2022 $ / shares shares
Restricted stock units outstanding, beginning balance (in shares) | shares	129
Weighted average grant date fair value, beginning balance (in dollars per share) | $ / shares	$ 24.73
Restricted stock units outstanding, granted (in shares) | shares	24
Weighted average grant date fair value, granted (in dollars per share) | $ / shares	$ 38.54
Restricted stock units outstanding, forfeited (in shares) | shares	(3)
Weighted average grant date fair value, forfeited (in dollars per share) | $ / shares	$ 22.09
Restricted stock units outstanding, released (in shares) | shares	(29)
Weighted average grant date fair value, released (in dollars per share) | $ / shares	$ 24.86
Restricted stock units outstanding, ending balance (in shares) | shares	121
Weighted average grant date fair value, ending balance (in dollars per share) | $ / shares	$ 27.48