Segment Information - Reconciliation of Segment Gross Profit (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Apr. 04, 2020	Mar. 30, 2019	Apr. 04, 2020	Mar. 30, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment gross profit	$ 24,169	$ 25,954	$ 45,469	$ 45,064
Selling, general and administrative expenses	(19,858)	(22,928)	(40,353)	(40,201)
Interest expense	(5,658)	(3,998)	(7,555)	(6,872)
Interest income	0	0	0	9
Other income (expense), net	180	(275)	374	(624)
Loss before income taxes	(1,167)	(1,247)	(2,065)	(2,624)
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment gross profit	24,169	25,954	45,469	45,064
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Selling, general and administrative expenses	(19,858)	(22,928)	(40,353)	(40,201)
Interest expense	(5,658)	(3,998)	(7,555)	(6,872)
Interest income	0	0	0	9
Other income (expense), net	$ 180	$ (275)	$ 374	$ (624)

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount of the cost of borrowed funds accounted for as interest expense.

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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.

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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