Product Warranties (Tables)

3 Months Ended

Dec. 31, 2020

Guarantees and Product Warranties [Abstract]

Schedule of product warranty liability

A reconciliation of the activity related to the accrued warranty, including both the current and long‑term portions, is as follows:

	Current Product Warranties				Non-Current Product Warranties
	Three Months Ended December 31,				Three Months Ended December 31,
	2020		2019		2020		2019
Balance at beginning of the period	$	6,115	$	4,922	$	1,724	$	2,332
Warranty provision for sales	371		1,251		252		44
Settlement of warranty claims	(978)		(1,989)		(374)		(1,076)
Amounts related to sale of the Memcor product line	—		795		—		135
Foreign currency translation and other	69		152		44		36
Balance at end of the period	$	5,577	$	5,131	$	1,646	$	1,471