Other Balance Sheet Information (Tables)

9 Months Ended

Jun. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Accounts Receivable

The following is a summary of accounts receivable at June 30, 2016 and September 30, 2015 (in thousands):

	June 30, 2016			September 30, 2015
Accounts receivable	$	103,396		$	87,582
Less: allowance for doubtful accounts	(2,200		)	(1,019		)
Less: allowance for sales returns	(105		)	(115		)
Accounts receivable, net	$	101,091		$	86,448

Summary of Inventories

The following is a summary of inventories at June 30, 2016 and September 30, 2015 (in thousands):

	June 30, 2016		September 30, 2015
Inventories:
Raw materials and purchased parts	$	60,883	$	62,441
Work-in-process	16,488		21,563
Finished goods	20,786		16,615
Total inventories	$	98,157	$	100,619

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, 2016 and 2015 (in thousands):

Activity - Three Months Ended June 30, 2016
Balance at March 31, 2016		Accruals		Costs Incurred			Balance at June 30, 2016
$	5,735	$	2,279	$	(2,059	)	$	5,955

Activity - Three Months Ended June 30, 2015
Balance at March 31, 2015		Accruals		Costs Incurred			Balance at June 30, 2015
$	6,203	$	2,725	$	(2,744	)	$	6,184

Activity - Nine Months Ended June 30, 2016
Balance at September 30, 2015		Accruals		Costs Incurred			Balance at June 30, 2016
$	6,089	$	6,989	$	(7,123	)	$	5,955

Activity - Nine Months Ended June 30, 2015
Balance at September 30, 2014		Adjustments for Acquisitions and Divestitures		Accruals		Costs Incurred			Balance at June 30, 2015
$	6,499	$	81	$	7,870	$	(8,266	)	$	6,184