Note H - Stock-based Compensation (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
Jul. 02, 2022 | Apr. 02, 2022 | Jan. 01, 2022 | Jul. 03, 2021 | Jul. 02, 2022 | Jul. 03, 2021 |
Share-Based Payment Arrangement, Expense | $ 1.1 | | | $ 0.5 | $ 2.4 | $ 2 |
Share-Based Payment Arrangement, Expense, Tax Benefit | $ 0.2 | | | $ 0.1 | 0.4 | $ 0.5 |
Performance Shares [Member] | Upon Filing of Annual Report in 2021 [Member] | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) | | | 47,700 | | | |
Performance Shares [Member] | Upon Filing of Annual Report in 2023 [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 10,000 | | 59,625 | | | |
Performance Shares [Member] | Upon Filing of Annual Report in 2023, Paid in Stock [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 5,000 | | | | | |
Performance Shares [Member] | Upon Filing of Annual Report in 2023, Paid in Cash [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 5,000 | | | | | |
Performance Shares [Member] | Upon Filing of Annual Report in 2024 [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 10,000 | | | | | |
Performance Shares [Member] | Upon Filing of Annual Report in 2024, Paid in Stock [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 5,000 | | | | | |
Performance Shares [Member] | Upon Filing of Annual Report in 2024, Paid in Cash [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 5,000 | | | | | |
Restricted Stock Units (RSUs) [Member] | Upon Filing of Annual Report in 2021 [Member] | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) | | | 95,000 | | | |
Restricted Stock Units (RSUs) [Member] | Upon Filing of Annual Report in 2022 [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 10,000 | | 5,000 | | | |
Restricted Stock Units (RSUs) [Member] | Upon Filing of Annual Report in 2023 [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 10,000 | 42,000 | 59,625 | | | |
Restricted Stock Units (RSUs) [Member] | Upon Filing of Annual Report in 2023, Paid in Stock [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 5,000 | 21,000 | | | | |
Restricted Stock Units (RSUs) [Member] | Upon Filing of Annual Report in 2023, Paid in Cash [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 5,000 | 21,000 | | | | |
Restricted Stock Units (RSUs) [Member] | Upon Filing of Annual Report in 2024 [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 10,000 | 42,000 | 13,000 | | | |
Restricted Stock Units (RSUs) [Member] | Upon Filing of Annual Report in 2024, Paid in Stock [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 5,000 | 21,000 | | | | |
Restricted Stock Units (RSUs) [Member] | Upon Filing of Annual Report in 2024, Paid in Cash [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 5,000 | 21,000 | | | | |
Restricted Stock Units and Performance Units [Member] | Upon Filing of Annual Report in 2021, Paid in Stock [Member] | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) | | | 96,350 | | | |
Restricted Stock Units and Performance Units [Member] | Upon Filing of Annual Report in 2021, Paid in Cash [Member] | | | | | | |
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Vested in Period, Payable in Cash (in shares) | | | 46,350 | | | |
Restricted Stock Units and Performance Units [Member] | Upon Filing of Annual Report in 2023, Paid in Stock [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | | | 64,625 | | | |
Restricted Stock Units and Performance Units [Member] | Upon Filing of Annual Report in 2023, Paid in Cash [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | | | 54,625 | | | |
The 2020 Stock Plan [Member] | | | | | | |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $ 4.9 | | | | $ 4.9 | |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) | | | | | 2 years 4 months 24 days | |