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Detail of Selected Balance Sheet Accounts (Tables)
 6 Months Ended
Mar. 31, 2015
Disclosure Text Block Supplement [Abstract]  
Activity in Allowance for Doubtful Accounts

Activity in our allowance for doubtful accounts receivable consisted of the following (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three months ended March 31,

 

 

Six months ended March 31,

 

 

2015

 

 

2014

 

 

2015

 

 

2014

 

Balance at beginning of period

$

1,844

 

 

$

673

 

 

$

1,577

 

 

$

572

 

Bad debt expense/(recovery)

 

186

 

 

 

(170

)

 

 

469

 

 

 

(60

)

Uncollectible accounts written off, net of recoveries

 

(120

)

 

 

—

 

 

 

(122

)

 

 

(9

)

Change in foreign currency translation

 

(29

)

 

 

(2

)

 

 

(43

)

 

 

(2

)

Balance at end of period

$

1,881

 

 

$

501

 

 

$

1,881

 

 

$

501

 

 
Components of Inventories

The components of inventories are summarized below (in thousands):

 

 

 

 

 

 

 

 

 

March 31, 2015

 

 

September 30, 2014

 

Raw materials, parts and subassemblies

$

39,063

 

 

$

35,349

 

Work-in-progress

 

1,558

 

 

 

2,035

 

Provision for excess and obsolete inventory

 

(4,886

)

 

 

(4,569

)

Total inventories

$

35,735

 

 

$

32,815

 

 
Cost and Estimated Earnings on Uncompleted Contracts

The components of costs and estimated earnings and related amounts billed on uncompleted contracts are summarized below (in thousands):

 

 

March 31,

 

 

September 30,

 

 

2015

 

 

2014

 

Costs incurred on uncompleted contracts

$

618,778

 

 

$

604,939

 

Estimated earnings

 

161,724

 

 

 

157,562

 

 

 

780,502

 

 

 

762,501

 

Less: Billings to date

 

(747,964

)

 

 

(715,233

)

Net underbilled position

$

32,538

 

 

$

47,268

 

 

 

 

 

 

 

 

 

Included in the accompanying balance sheets under the following captions:

 

 

 

 

 

 

 

Costs and estimated earnings in excess of billings on uncompleted contracts - underbilled

$

96,709

 

 

$

95,970

 

Billings in excess of costs and estimated earnings on uncompleted contracts - overbilled

 

(64,171

)

 

 

(48,702

)

Net underbilled position

$

32,538

 

 

$

47,268

 

 
Activity in Product Warranty Accrual

Activity in our product warranty accrual consisted of the following (in thousands):

 

Three months ended March 31,

 

 

Six months ended March 31,

 

 

2015

 

 

2014

 

 

2015

 

 

2014

 

Balance at beginning of period

$

4,480

 

 

$

5,010

 

 

$

4,557

 

 

$

5,282

 

Increase to warranty expense

 

530

 

 

 

1,042

 

 

 

1,067

 

 

 

1,505

 

Deduction for warranty charges

 

(504

)

 

 

(1,196

)

 

 

(1,028

)

 

 

(1,926

)

Increase (decrease) due to foreign currency translations

 

(131

)

 

 

(23

)

 

 

(221

)

 

 

(28

)

Balance at end of period

$

4,375

 

 

$

4,833

 

 

$

4,375

 

 

$

4,833