Other Balance Sheet Information (Tables)

9 Months Ended

Jun. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Accounts Receivable

The following is a summary of accounts receivable at June 30, 2020 and September 30, 2019 (in thousands):

	June 30,		September 30,
	2020		2019
Accounts receivable	$	189,059	$	169,317
Less allowance for doubtful accounts		(5,805)		(3,644)
Less allowance for sales returns		(87)		(71)
Accounts receivable, net	$	183,167	$	165,602

Summary of Inventories

The following is a summary of inventories at June 30, 2020 and September 30, 2019 (in thousands):

	June 30,		September 30,
	2020		2019
Inventories
Raw materials and purchased parts	$	77,715	$	67,176
Work-in-process		16,307		13,684
Finished goods		23,664		18,585
Total inventories	$	117,686	$	99,445

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 nine months ended June 30, 2020 and 2019 (in thousands):

Activity -Three Months Ended June 30, 2020
Balance						Balance
March 31,						June 30,
2020		Accruals		Costs Incurred		2020
$	7,910	$	1,380	$	(1,409)	$	7,881
Activity -Three Months Ended June 30, 2019
Balance						Balance
March 31,						June 30,
2019		Accruals		Costs Incurred		2019
$	7,202	$	2,257	$	(2,269)	$	7,190
Activity -Nine Months Ended June 30, 2020
Balance						Balance
September 30,						June 30,
2019		Accruals		Costs Incurred		2020
$	7,175	$	6,033	$	(5,327)	$	7,881
Activity -Nine Months Ended June 30, 2019
Balance						Balance
September 30,						June 30,
2018		Accruals		Costs Incurred		2019
$	6,340	$	6,419	$	(5,569)	$	7,190