Restructuring and Related Charges (Details) - USD ($)	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	$ 1,200
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of the period	3,542,000	$ 13,217,000
Restructuring charges related to VSP	312,000	19,199,000
Charges related to other initiatives	8,440,000	2,896,000
Write off charge and other non‑cash activity	(479,000)	(374,000)
Cash payments	(11,395,000)	(28,904,000)
Other adjustments	24,000	124,000
Restructuring reserve, end of the period	444,000	6,158,000
Cost of Product Sales and Services [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges related to VSP	3,086,000	9,664,000
General and Administrative Expense [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges related to VSP	4,309,000	5,210,000
Sales and Marketing Expense [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges related to VSP	750,000	6,843,000
Research and Development Expense [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges related to VSP	$ 607,000	$ 378,000