Other Balance Sheet Information (Tables)

6 Months Ended

Mar. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Accounts Receivable

The following is a summary of accounts receivable at March 31, 2022 and September 30, 2021 (in thousands):

	March 31,		September 30,
	2022		2021
Accounts receivable	$	142,200	$	124,195
Less allowance for expected credit losses		(4,622)		(4,318)
Accounts receivable, net	$	137,578	$	119,877

Summary of Inventories

The following is a summary of inventories at March 31, 2022 and September 30, 2021 (in thousands):

	March 31,		September 30,
	2022		2021
Inventories
Raw materials and purchased parts	$	28,546	$	27,644
Work-in-process		5,885		4,787
Finished goods		43,321		27,967
Total inventories	$	77,752	$	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 and six months ended March 31, 2022 and 2021 (in thousands):

Activity -Three Months Ended March 31, 2022
Balance						Balance
December 31,						March 31,
2021		Accruals		Costs Incurred		2022
$	2,342	$	539	$	(390)	$	2,491
Activity -Three Months Ended March 31, 2021
Balance						Balance
December 31,						March 31,
2020		Accruals		Costs Incurred		2021
$	2,267	$	167	$	(252)	$	2,182
Activity -Six Months Ended March 31, 2022
Balance						Balance
September 30,						March 31,
2021		Accruals		Costs Incurred		2022
$	2,330	$	1,212	$	(1,051)	$	2,491
Activity -Six Months Ended March 31, 2021
Balance						Balance
September 30,						March 31,
2020		Accruals		Costs Incurred		2021
$	2,211	$	813	$	(842)	$	2,182