Debt - Additional Information (Details) $ in Millions	9 Months Ended
Jun. 27, 2020 USD ($)	Sep. 28, 2019 USD ($)
Debt Instrument [Line Items]
Fixed charge ratio, covenant one	1.0
Fixed charge ratio, covenant two	1.15
Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 80.0
Credit Facility \| Letter of Credit
Debt Instrument [Line Items]
Unused borrowing capacity	$ 0.5	$ 0.5
LIBOR
Debt Instrument [Line Items]
Interest rate, spread on variable rate	2.25%
LIBOR \| Credit Facility
Debt Instrument [Line Items]
Interest rate, spread on variable rate	2.50%

Debt Instrument, Fixed Charge Ratio, Covenant One1

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- Definition

Debt Instrument, Fixed Charge Ratio, Covenant Two

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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