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Accounts and note receivable - Narrative (Details) - USD ($) $ in Thousands					3 Months Ended	12 Months Ended
	Jul. 07, 2026	Jan. 07, 2026	Jul. 07, 2025	Feb. 23, 2025	Sep. 30, 2025	May 25, 2025	Jan. 07, 2025
Concentration Risk [Line Items]
Note receivable							$ 10,000
Proceeds from collection of notes receivable			$ 4,000
Note receivable, variable interest rate							1.00%
Note receivable, effective interest rate				8.50%
Note receivable, discount							$ 410
Forecast
Concentration Risk [Line Items]
Proceeds from collection of notes receivable	$ 2,000	$ 4,000
Customer A | Accounts receivable | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk percentage					28.00%	45.00%
Customer B | Accounts receivable | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk percentage					19.00%	16.00%
Customer C | Accounts receivable | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk percentage					17.00%

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