Other Balance Sheet Information (Tables)

3 Months Ended

Dec. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Accounts Receivable

The following is a summary of accounts receivable at December 31, 2021 and September 30, 2021 (in thousands):

	December 31,		September 30,
	2021		2021
Accounts receivable	$	130,415	$	124,195
Less allowance for expected credit losses		(4,414)		(4,318)
Accounts receivable, net	$	126,001	$	119,877

Summary of Inventories

The following is a summary of inventories at December 31, 2021 and September 30, 2021 (in thousands):

	December 31,		September 30,
	2021		2021
Inventories
Raw materials and purchased parts	$	34,379	$	27,644
Work-in-process		1,835		4,787
Finished goods		33,929		27,967
Total inventories	$	70,143	$	60,398

Product Warranty and Retrofit Activity on Gross Basis

The following is a summary of product warranty and retrofit activity on a gross basis for the three months ended December 31, 2021 and 2020 (in thousands):

Activity -Three Months Ended December 31, 2021
Balance						Balance
September 30,						December 31,
2021		Accruals		Costs Incurred		2021
$	2,330	$	673	$	(660)	$	2,342
Activity -Three Months Ended December 31, 2020
Balance						Balance
September 30,						December 31,
2020		Accruals		Costs Incurred		2020
$	2,211	$	648	$	(592)	$	2,267