Business Acquisitions - Narrative (Details) - USD ($)		3 Months Ended
	Dec. 31, 2019	Jan. 02, 2021	Dec. 28, 2019	Oct. 03, 2020	[1]
Business Acquisition [Line Items]
Contingent consideration assumed in acquisition		$ 28,131,000		$ 26,497,000
Revenue		198,804,000	$ 205,843,000
R&D Acquisition
Business Acquisition [Line Items]
Consideration paid at closing	$ 58,373,000
Estimated contingent consideration	16,903,000
Revenue		21,601,000
Acquisition costs		748,000
Goodwill, expected tax deductible amount		$ 0
Intangible assets	42,251,000
R&D Acquisition | Maximum
Business Acquisition [Line Items]
Earn-out payments	$ 26,000,000

[1] The Consolidated Balance Sheet as of October 3, 2020 has been derived from the audited consolidated financial statements at that date.The accompanying Notes to Consolidated Financial Statements (Unaudited) are an integral part of these consolidated financial statements.