Restructuring Plan - Summary of Restructuring and Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 03, 2020	Oct. 03, 2020
Restructuring Cost and Reserve [Line Items]
Employee related costs	$ 8,985
Right-of-use asset impairment and abandonment charges	8,139
Property and equipment abandonment charges	5,824
Other restructuring costs	3,337
Total	26,285	$ 12,287
Restructuring charges	26,285	$ 12,287
Research and development
Restructuring Cost and Reserve [Line Items]
Total	5,074
Restructuring charges	5,074
Sales and marketing
Restructuring Cost and Reserve [Line Items]
Total	19,788
Restructuring charges	19,788
General and administrative
Restructuring Cost and Reserve [Line Items]
Total	1,423
Restructuring charges	$ 1,423