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Stock Ownership Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Sep. 24, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Non-cash stock compensation expense	$ 1.8	$ 1.8	$ 1.8
Common stock reserved for future issuances (in shares)	496,136
Unrecognized compensation expense for unvested restricted common stock	$ 0.5
Cost not yet recognized, period for recognition (years)	10 months 24 days
Fair value of shares vested in period	$ 0.5	$ 0.4	$ 1.1
Employee Stock Purchase Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Employee stock ownership plan, shares available for issuance (in shares)	27,000
Supplemental Employee Stock Purchase Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Employee stock ownership plan, shares available for issuance (in shares)	870
Options
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting or restriction period (in years)	10 years
Weighted average grant date fair value of options granted (in dollars per share)	$ 2.18
Unrecognized compensation expense for unvested restricted common stock	$ 0.1
Performance Shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting or restriction period (in years)	3 years
Granted (in dollars per share)	$ 12.22
Total unrecognized compensation expense	$ 0.7

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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