Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Sep. 28, 2019
Income Tax Disclosure [Abstract]
Income tax discrete expense (benefit)		$ (1,807)	$ (1,293)
Tax expense, share-based payment arrangement		405
Change in enacted tax rate		382	1,297
Tax Cuts and Jobs Act of 2017, income tax expense (benefit)	$ 1,297		$ 4
Unrecognized tax benefits		4,770		$ 4,414
Unrecognized tax benefits that would favorably impact the effective tax rate on continuing operations		$ 3,117		$ 2,761

Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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Amount of income tax expense (benefit) for measurement period adjustment from accounting for tax effect pursuant to Tax Cuts and Jobs Act.

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Amount of unrecognized tax benefits.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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