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Detail Of Selected Balance Sheet Accounts | 9 Months Ended
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Jun. 30, 2013
Detail Of Selected Balance Sheet Accounts [Abstract] |
Detail Of Selected Balance Sheet Accounts | D. DETAIL OF SELECTED BALANCE SHEET ACCOUNTS Allowance for Doubtful Accounts Activity in our allowance for doubtful accounts receivable consisted of the following (in thousands):
| Three Months Ended |  | Nine Months Ended
| June 30, |  | June 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Balance at beginning of period | $ | 912 |  | $ | 1,043 |  | $ | 1,399 |  | $ | 391
Increase (decrease) to bad debt expense |  | 68 |  |  | (127) |  |  | (310) |  |  | 509
Deductions for uncollectible accounts written off, net of recoveries |  | (54) |  |  | 175 |  |  | (151) |  |  | 175
Increase (decrease) due to foreign currency translation |  | (2) |  |  | 5 |  |  | (14) |  |  | 21
Balance at end of period | $ | 924 |  | $ | 1,096 |  | $ | 924 |  | $ | 1,096
Warranty Accrual Activity in our product warranty accrual consisted of the following (in thousands):
| Three Months Ended |  | Nine Months Ended
| June 30, |  | June 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Balance at beginning of period | $ | 5,242 |  | $ | 4,783 |  | $ | 5,714 |  | $ | 4,603
Increase to warranty expense |  | 430 |  |  | 752 |  |  | 1,965 |  |  | 2,084
Deduction for warranty charges |  | (874) |  |  | (1,068) |  |  | (2,798) |  |  | (2,254)
Increase (decrease) due to foreign currency translations |  | (7) |  |  | (40) |  |  | (90) |  |  | (6)
Balance at end of period | $ | 4,791 |  | $ | 4,427 |  | $ | 4,791 |  | $ | 4,427
Inventories The components of inventories are summarized below (in thousands):
| June 30, |  | September 30,
| 2013 |  | 2012
Raw materials, parts and subassemblies | $ | 32,694 |  | $ | 33,632
Work-in-progress |  | 4,217 |  |  | 6,422
Provision for excess and obsolete inventory |  | (6,177) |  |  | (7,137)
Total inventories | $ | 30,734 |  | $ | 32,917
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, |  | September 30,
| 2013 |  | 2012
Costs incurred on uncompleted contracts | $ | 605,097 |  | $ | 635,714
Estimated earnings |  | 147,503 |  |  | 168,480
|  | 752,600 |  |  | 804,194
Less: Billings to date |  | 745,981 |  |  | 754,604
Net underbilled position | $ | 6,619 |  | $ | 49,590
Included in the accompanying balance sheets under the following captions: |  |  |  |  |
Costs and estimated earnings in excess of billings on uncompleted contracts | $ | 73,806 |  | $ | 86,734
Billings in excess of costs and estimated earnings on uncompleted contracts |  | (67,187) |  |  | (37,144)
Net underbilled position | $ | 6,619 |  | $ | 49,590

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