Segment Information (Details) $ in Thousands	3 Months Ended
	Jan. 01, 2022 USD ($) segment	Jan. 02, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | segment	2
Net sales	$ 129,223	$ 130,434
Gross profit	16,197	14,468
United States
Segment Reporting Information [Line Items]
Net sales	100,547	119,077
Canada
Segment Reporting Information [Line Items]
Net sales	26,304	10,466
Rest of world
Segment Reporting Information [Line Items]
Net sales	2,372	891
Operating Segments
Segment Reporting Information [Line Items]
Gross profit	16,197	14,468
Operating Segments | Bus
Segment Reporting Information [Line Items]
Net sales	112,437	117,834
Gross profit	9,642	9,710
Operating Segments | Parts
Segment Reporting Information [Line Items]
Net sales	16,786	12,600
Gross profit	6,555	$ 4,758
Intersegment Eliminations | Parts
Segment Reporting Information [Line Items]
Net sales	$ 800