Other Balance Sheet Information (Tables)

6 Months Ended

Mar. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Accounts Receivable

The following is a summary of accounts receivable at March 31, 2015 and September 30, 2014 (in thousands):

	March 31, 2015			September 30, 2014
Accounts receivable	$	96,066		$	81,270
Less allowance for doubtful accounts	(1,261		)	(1,031		)
Less allowance for sales returns	(126		)	(133		)
	$	94,679		$	80,106

Summary of Inventories

The following is a summary of inventories at March 31, 2015 and September 30, 2014, excluding amounts related to discontinued operations (in thousands):

	March 31, 2015		September 30, 2014
Inventories
Raw materials and purchased parts	$	55,456	$	57,250
Work-in-process	19,600		20,068
Finished goods	15,502		16,249
	$	90,558	$	93,567

Product Warranty and Retrofit Activity on Gross Basis

Product warranty and retrofit activity on a gross basis for the three and six months ended March 31, 2015 and 2014, excluding amounts related to discontinued operations, is as follows (in thousands):

Activity - Three months ended March 31, 2015
Balance at December 31, 2014		Adjustments for Acquisitions and Divestitures		Accruals		Costs Incurred			Balance at March 31, 2015
$	6,255	$	—	$	2,428	$	(2,480	)	$	6,203

Activity - Three months ended March 31, 2014
Balance at December 31, 2013		Adjustments for Acquisitions and Divestitures		Accruals		Costs Incurred			Balance at March 31, 2014
$	6,762	$	—	$	2,275	$	(2,718	)	$	6,319