Detail Of Selected Balance Sheet Accounts (Tables)

6 Months Ended

Mar. 31, 2013

Detail Of Selected Balance Sheet Accounts [Abstract]

Activity In Allowance For Doubtful Accounts

	Three Months Ended				Six Months Ended
	March 31,				March 31,
	2013		2012		2013		2012
Balance at beginning of period	$	1,050	$	588	$	1,399	$	391
Increase (decrease) to bad debt expense		(87)		451		(380)		636
Deductions for uncollectible accounts written off, net of recoveries		(28)		--		(85)		--
Increase (decrease) due to foreign currency translation		(23)		4		(22)		16
Balance at end of period	$	912	$	1,043	$	912	$	1,043

Activity In Product Warranty Accrual

	Three Months Ended				Six Months Ended
	March 31,				March 31,
	2013		2012		2013		2012
Balance at beginning of period	$	5,754	$	4,396	$	5,714	$	4,603
Increase to warranty expense		775		917		1,412		1,386
Deduction for warranty charges		(1,205)		(590)		(1,801)		(1,240)
Increase (decrease) due to foreign currency translations		(82)		60		(83)		34
Balance at end of period	$	5,242	$	4,783	$	5,242	$	4,783

Components Of Inventories

	March 31,		September 30,
	2013		2012
Raw materials, parts and subassemblies	$	34,136	$	33,632
Work-in-progress		4,770		6,422
Provision for excess and obsolete inventory		(6,660)		(7,137)
Total inventories	$	32,246	$	32,917

Cost And Estimated Earnings On Uncompleted Contracts

	March 31,		September 30,
	2013		2012
Costs incurred on uncompleted contracts	$	577,270	$	635,714
Estimated earnings		140,977		168,480
		718,247		804,194
Less:  Billings to date		704,372		754,604
Net underbilled position	$	13,875	$	49,590
Included in the accompanying balance sheets under the following captions:
Costs and estimated earnings in excess of billings on uncompleted contracts	$	72,077	$	86,734
Billings in excess of costs and estimated earnings on uncompleted contracts		(58,202)		(37,144)
Net underbilled position	$	13,875	$	49,590