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Net Income (Loss) per Common Share (Summary of Reconciles Basic and Diluted Weighted-Average Shares Outstanding) (Details) - shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 29, 2021 | Jun. 30, 2020 | Jun. 29, 2021 | Jun. 30, 2020
Earnings Per Share [Abstract] |  |  |  |
Weighted-average shares outstanding basic | 12,787,390 | 12,591,079 | 12,689,587 | 12,593,137
Effect of potentially dilutive securities: |  |  |  |
Stock options | 225,471 |  | 40,553 |
Restricted stock units | 63,774 | 104,949 | 63,774 |
Weighted-average shares outstanding diluted | 13,076,635 | 12,696,028 | 12,793,915 | 12,593,137
Excluded from diluted weighted-average shares outstanding: |  |  |  |
Antidilutive | 289,611 | 632,976 | 474,528 | 737,925

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