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Detail of Selected Balance Sheet Accounts (Tables)
 9 Months Ended
Jun. 30, 2016
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 June 30,

 

 

Nine months ended June 30,

 

 

2016

 

 

2015

 

 

2016

 

 

2015

 

Balance at beginning of period

$

976

 

 

$

1,881

 

 

$

746

 

 

$

1,577

 

Bad debt expense (recovery)

 

(118

)

 

 

(438

)

 

 

221

 

 

 

31

 

Uncollectible accounts written off, net of recoveries

 

16

 

 

 

(145

)

 

 

(98

)

 

 

(267

)

Change in foreign currency translation

 

(3

)

 

 

14

 

 

 

2

 

 

 

(29

)

Balance at end of period

$

871

 

 

$

1,312

 

 

$

871

 

 

$

1,312

 

 
Components of Inventories

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

 

 

 

 

 

 

 

 

 

June 30, 2016

 

 

September 30, 2015

 

Raw materials, parts and subassemblies, net

$

27,308

 

 

$

31,807

 

Work-in-progress

 

830

 

 

 

1,084

 

Total inventories

$

28,138

 

 

$

32,891

 

 
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):

 

 

 

 

 

 

 

 

 

June 30, 2016

 

 

September 30, 2015

 

Costs incurred on uncompleted contracts

$

1,048,831

 

 

$

912,237

 

Estimated earnings

 

332,472

 

 

 

271,640

 

 

 

1,381,303

 

 

 

1,183,877

 

Less: Billings to date

 

(1,344,298

)

 

 

(1,121,141

)

Net underbilled position

$

37,005

 

 

$

62,736

 

 

 

 

 

 

 

 

 

Included in the accompanying balance sheets under the following captions:

 

 

 

 

 

 

 

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

$

80,026

 

 

$

104,793

 

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

 

(43,021

)

 

 

(42,057

)

Net underbilled position

$

37,005

 

 

$

62,736

 

 
Activity in Product Warranty Accrual

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

 

Three months ended June 30,

 

 

Nine months ended June 30,

 

 

2016

 

 

2015

 

 

2016

 

 

2015

 

Balance at beginning of period

$

4,787

 

 

$

4,375

 

 

$

4,930

 

 

$

4,557

 

Increase to warranty expense

 

1,174

 

 

 

1,033

 

 

 

3,332

 

 

 

2,100

 

Deduction for warranty charges

 

(1,206

)

 

 

(766

)

 

 

(3,481

)

 

 

(1,794

)

Change in foreign currency translation

 

(26

)

 

 

81

 

 

 

(52

)

 

 

(140

)

Balance at end of period

$

4,729

 

 

$

4,723

 

 

$

4,729

 

 

$

4,723