Debt (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended			0 Months Ended	12 Months Ended	15 Months Ended			0 Months Ended	36 Months Ended	0 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Dec. 12, 2007 Loan Agreement [Member]	Sep. 30, 2012 Revolving Credit Facility 2006 [Member]	Dec. 15, 2011 Revolving Credit Facility 2006 [Member]	Dec. 15, 2011 Revolving Credit Facility 2006 [Member] Loan Agreement [Member]	Dec. 15, 2011 Revolving Credit Facility 2006 [Member] Amendment Agreement [Member]	Aug. 09, 2012 Revolving Credit Facility 2012 [Member]	Aug. 09, 2015 Revolving Credit Facility 2012 [Member]	Aug. 09, 2012 Revolving Credit Facility 2012 [Member] Minimum [Member]	Aug. 09, 2012 Revolving Credit Facility 2012 [Member] Maximum [Member]	Dec. 12, 2007 Subordinated Debt [Member]
Debt [Abstract]
Interest expense	$ 2,324	$ 2,278	$ 3,513
Debt Instrument [Line Items]
Amortization Peroid Of Debt Amendment Fee							60
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, 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 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:
Line of Credit Facility, Remaining Borrowing Capacity									21,607
Outstanding letters of credit collateralized with restricted cash					6,148				700
Line of Credit Facility, Frequency of Payments					monthly
Unused commitment fee					0.50%				0.50%
Debt Inception Date				2007-12-12
Debt Instrument, Unused Borrowing Capacity, Amount				25,000
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate				11.00%
Maturity date													May 15, 2013
Line of Credit Facility, Collateral Fees, Amount											1	2
Rate Of Payment For Fees	3.49%
Restricted Cash and Cash Equivalents					6,455
Capital Leases, Income Statement, Amortization Expense	$ 182	$ 172	$ 157