Long-Term Debt - Narrative (Details) - USD ($)		9 Months Ended		12 Months Ended		14 Months Ended	15 Months Ended	38 Months Ended
	Nov. 20, 2019	Sep. 28, 2021	Sep. 29, 2020	Oct. 03, 2023	Sep. 27, 2022	Nov. 20, 2024	Sep. 28, 2021	Nov. 20, 2024	Dec. 29, 2020	Jun. 16, 2020	May 09, 2018
Line of Credit Facility [Line Items]
Indebtedness		$ 23,688,000					$ 23,688,000
Unamortized debt issuance costs		1,400,000					1,400,000
Letters of credit outstanding		3,200,000					3,200,000
Payments on long-term debt		20,118,000	$ 54,125,000
Cash on hand		$ 3,149,000					$ 3,149,000		$ 7,840,000
Minimum
Line of Credit Facility [Line Items]
Interest rate during period		3.33%
Maximum
Line of Credit Facility [Line Items]
Interest rate during period		3.52%
Term loan
Line of Credit Facility [Line Items]
Payments on long-term debt		$ 500,000
Revolving credit facility
Line of Credit Facility [Line Items]
Payments on long-term debt		19,600,000
2018 Credit Facility | Term loan
Line of Credit Facility [Line Items]
Aggregate principal amount											$ 25,000,000
Quarterly principal payments		$ 187,500
Frequency of periodic payment		quarter
2018 Credit Facility | Term loan | Forecast
Line of Credit Facility [Line Items]
Quarterly principal payments				$ 531,250	$ 375,000	$ 625,000
2018 Credit Facility | Revolving credit facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity											65,000,000
2018 Credit Facility | Letter of credit subfacility
Line of Credit Facility [Line Items]
Maximum borrowing capacity											15,000,000
2018 Credit Facility | Swingline subfacility
Line of Credit Facility [Line Items]
Maximum borrowing capacity											$ 10,000,000
First Amended Credit Facility
Line of Credit Facility [Line Items]
Capital expenditure limit in current fiscal year per agreement	$ 37,000,000
Capital expenditure limit in each year after current fiscal year	$ 45,000,000
First Amended Credit Facility | LIBOR | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.00%
First Amended Credit Facility | LIBOR | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.75%
First Amended Credit Facility | Base Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
First Amended Credit Facility | Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.75%
First Amended Credit Facility | Federal Funds Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
First Amended Credit Facility | Prime Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
First Amended Credit Facility | Revolving credit facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 75,000,000
First Amended Credit Facility | Revolving credit facility | Minimum
Line of Credit Facility [Line Items]
Commitment fee percentage	0.20%
First Amended Credit Facility | Revolving credit facility | Maximum
Line of Credit Facility [Line Items]
Commitment fee percentage	0.35%
Second Amended Credit Facility
Line of Credit Facility [Line Items]
Capital expenditure limit in current fiscal year per agreement										$ 12,000,000
Capital expenditure limit in next fiscal year per agreement										12,000,000
Liquidity-based performance basket in next fiscal year per agreement										12,000,000
Capital expenditure limit in 2022 per agreement										34,000,000
Capital expenditure limit in 2023 per agreement										37,000,000
Capital expenditure limit after 2023 per agreement										$ 45,000,000
Second Amended Credit Facility | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate							3.25%
Second Amended Credit Facility | LIBOR | Minimum | Forecast
Line of Credit Facility [Line Items]
Basis spread on variable rate								2.00%
Second Amended Credit Facility | LIBOR | Maximum | Forecast
Line of Credit Facility [Line Items]
Basis spread on variable rate								3.00%