Restructuring and Related Charges (Details) $ in Thousands		3 Months Ended
	Oct. 29, 2018 segment	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of reportable segments | segment	3	2
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of the period		$ 655	$ 710
Restructuring charges		867	2,929
Restructuring charges related to other initiatives		245	989
Write off charge and other non‑cash activity		(53)	(5)
Cash payments		(1,156)	(2,664)
Other adjustments		(1)	(16)
Restructuring reserve, end of the period		365	959
Cost of Product Sales and Services
Restructuring Reserve [Roll Forward]
Restructuring charges		384	698
General and Administrative Expense
Restructuring Reserve [Roll Forward]
Restructuring charges		480	2,028
Sales and Marketing Expense
Restructuring Reserve [Roll Forward]
Restructuring charges		3	203
Two-segment realignment
Restructuring Reserve [Roll Forward]
Restructuring charges		675	$ 1,945
Other Restructuring [Member] | Two-segment realignment
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		$ 3,000