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Debt (Details) (USD $) | 3 Months Ended | 9 Months Ended |  |  | 0 Months Ended | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Feb. 12, 2013 | Sep. 30, 2012 | May 01, 2010 Revolving Credit Facility 2006 [Member] | Jun. 30, 2012 Revolving Credit Facility 2006 [Member] | Jun. 30, 2013 Revolving Credit Facility 2006 [Member] | Dec. 15, 2011 Revolving Credit Facility 2006 [Member] | Jun. 30, 2013 Revolving Credit Facility 2012 [Member] | Jun. 30, 2013 Revolving Credit Facility 2012 [Member] | Aug. 09, 2012 Revolving Credit Facility 2012 [Member] | Jun. 30, 2013 Revolving Credit Facility 2012 [Member] Minimum [Member] | Jun. 30, 2013 Revolving Credit Facility 2012 [Member] Maximum [Member]
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense | $ 372 | $ 524 | $ 1,425 | $ 1,612 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Expense | 372 | 524 | 1,425 | 1,612 |  |  |  |  |  |  |  |  |  |  |
Amortization Peroid Of Debt Amendment Fee |  |  |  |  |  |  | 200 |  |  |  |  |  |  |  |
Line of Credit Facility, Initiation Date |  |  |  |  |  |  |  |  | Dec. 15, 2011 |  |  | Aug. 09, 2012 |  |  |
Revolving credit facility amount |  |  |  |  |  |  |  |  |  | 40,000 |  |  | 30,000 |  |
Line Of Credit Facility, Expiration Date |  |  |  |  |  |  |  |  | Nov. 12, 2012 |  |  | Aug. 09, 2015 |  |  |
Line of Credit Facility, Description |  |  |  |  |  |  |  |  | Under the terms of the amended 2006 Credit Facility, the size of the facility was reduced to $40,000 and the maturity date was November 12, 2012. On August 9, 2012, the 2006 Credit Facility was replaced by the 2012 Credit Facility. Under the terms of the amended 2006 Credit Facility, we were required to cash collateralize all of our letters of credit issued by the banks. The cash collateral was added to the borrowing base calculation at 100% throughout the term of the agreement. The 2006 Credit Facility required that we maintain a fixed charge coverage ratio of not less than 1.0:1.0 at any time that our aggregate amount of unrestricted cash on hand plus availability was less than $25,000 and, thereafter, until such time as our aggregate amount of unrestricted cash on hand plus availability had been at least $25,000 for a period of 60 consecutive days. The amended Agreement also called for cost of borrowings of 4.0% over LIBOR per annum. Cost for letters of credit was the same as borrowings and also included a 25 basis point “fronting fee.” All other terms and conditions remained unchanged. In connection with the amendment, we incurred an amendment fee of $60 which, together with unamortized balance of the prior amendment was amortized using the straight line method through August 30, 2012. The 2006 Credit Facility was guaranteed by our subsidiaries and secured by first priority liens on substantially all of our subsidiaries’ existing and future acquired assets, exclusive of collateral provided to our surety providers. The 2006 Credit Facility contained customary affirmative, negative and financial covenants. The 2006 Credit Facility also restricted us from paying cash dividends and placed limitations on our ability to repurchase our common stock. Borrowings under the 2006 Credit Facility could not exceed a “borrowing base” that was determined monthly by our lenders based on available collateral, primarily certain accounts receivables and inventories. Under the terms of the 2006 Credit Facility in effect as of August 30, 2012, interest for loans and letter of credit fees was based on our Total Liquidity, which is calculated for any given period as the sum of average daily availability for such period plus average daily unrestricted cash on hand for such period as follows: |  |  | The 2012 Credit Facility contains customary affirmative, negative and financial covenants. The 2012 Credit Facility requires that we maintain a fixed charge coverage ratio of not less than 1.0:1.0 at any time that our aggregate amount of unrestricted cash and cash equivalents on hand plus Excess Availability (as defined in the Credit Agreement) is less than $20,000 or Excess Availability is less than $7,500. Borrowings under the 2012 Credit Facility may not exceed a “borrowing base” that is determined monthly by our lenders based on available collateral, primarily certain accounts receivables and inventories. Under the terms of the 2012 Credit Facility, amounts outstanding other than amounts outstanding on the Wells Fargo Term Loan bear interest at a per annum rate equal to a Daily Three Month LIBOR (as defined in the Credit Agreement), plus an interest rate margin, which is determined quarterly, based on the following thresholds: |  |  |
Weighted Average Interest Rate For Letters Of Credit |  |  |  |  |  |  |  | 3.75% |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  |  |  |  |  |  |  |  |  | 14,868 | 14,868 |  |  |
Outstanding letters of credit collateralized with restricted cash |  |  |  |  |  |  |  |  |  |  | 7,052 | 7,052 |  |  |
Unused commitment fee |  |  |  |  |  |  |  | 0.50% |  |  | 0.50% |  |  |  |
Line of Credit Facility, Collateral Fees, Amount |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 | 2
Restricted Cash and Cash Equivalents | 7,052 |  | 7,052 |  |  | 7,155 |  |  |  |  |  |  |  |  |
Capital Leases, Income Statement, Amortization Expense | 46 | 46 | 137 | 137 |  |  |  |  |  |  |  |  |  |  |
Wells Fargo Term Loan |  |  |  |  | $ 5,000 |  |  |  |  |  |  |  |  |  |

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