Note 12 - Stock-based Compensation - Unvested Restricted Stock Units and Performance Units (Details) - $ / shares	Oct. 02, 2021	Oct. 03, 2020	Sep. 28, 2019
Number of units (in shares)	260,000	406,000	283,500
Average market price on date of grant (in dollars per share)	$ 20.38	$ 20.16	$ 19.78
The 2020 Stock Plan [Member]
Number of units (in shares)	260,000
Average market price on date of grant (in dollars per share)
Performance Shares [Member] \| The 2010 Stock Plan [Member] \| Vesting On November 2020 [Member]
Number of units (in shares)	45,000
Average market price on date of grant (in dollars per share)	$ 23.06
Restricted Stock Units (RSUs) [Member] \| The 2010 Stock Plan [Member] \| Vesting On November 2020 [Member]
Number of units (in shares)	95,000
Average market price on date of grant (in dollars per share)	$ 17.42
Restricted Stock Units (RSUs) [Member] \| The 2020 Stock Plan [Member] \| Vesting On November 2021 [Member]
Number of units (in shares)	108,000
Restricted Stock Units (RSUs) [Member] \| The 2020 Stock Plan [Member] \| Vesting On November 2022 [Member]
Number of units (in shares)	12,000
Average market price on date of grant (in dollars per share)	$ 30.80
Restricted Stock Units (RSUs) [Member] \| Vesting On November 2021 [Member] \| Vesting On November 2021 [Member]
Average market price on date of grant (in dollars per share)	$ 20.70