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Debt (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Debt [Abstract] |  |  |
Interest expense | $ 1,574 | $ 1,771 | $ 2,324
Amount available under the 2012 Credit Facility | 17,334 |  |
Letters of Credit Outstanding | 6,918 |  |
Outstanding borrowings on Revolving Loan | 10,208 |  |
2012 Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Initiation Date | Aug. 09, 2012 |  |
Line Of Credit Facility, Expiration Date | Aug. 09, 2018 |  |
Line of Credit Facility, Description | On August 9, 2012, we entered into a Credit and Security Agreement (the “Credit Agreement”), for a credit facility (as amended, the “2012 Credit Facility”) with Wells Fargo Bank, National Association (“Wells Fargo”). We have subsequently entered into three amendments to the 2012 Credit Facility and entered into an Amended and Restated Credit and Security Agreement (the “Amended Credit Agreement”) as of September 24, 2014, which increased the maximum revolver under the 2012 Credit Facility amount from $30 million to $60 million, and extended the maturity date by one year to August 9, 2018. In addition, under the Amended Credit Agreement, the Company eliminated its term loan facility so that borrowings that would previously have been made under the term loan facility, including borrowings for acquisitions, will now be made under the revolving credit facility with terms more favorable than the term loan facility, including a lower interest rate (as described below). |  |
Line Of Credit Facility Covenant Terms | The 2012 Credit Facility contains customary affirmative, negative and financial covenants. At September 30, 2014, we were subject to the financial covenant under the 2012 Credit Facility requiring, at any time that our Liquidity (the aggregate amount of unrestricted cash and cash equivalents on hand plus Excess Availability, as defined in the Amended Credit Agreement) is less than $20 million or our Excess Availability is less than $5 million, that we maintain a Fixed Charge Coverage Ratio of not less than 1.0:1.0. At September 30, 2014, our Liquidity was $64,676 and our Excess Availability was $17,334, and as such, we were not required to maintain a Fixed Charge Coverage Ratio of 1.0:1.0 as of such date. Nonetheless, at September 30, 2014, our Fixed Charge Coverage Ratio was 1.7:1.0. Compliance with our Fixed Charge Coverage Ratio, while not required at September 30, 2014, provides us with the ability to use cash on hand or to draw on our 2012 Credit Facility such that we can fall below the Excess Availability and Liquidity minimum thresholds described above without violating our financial covenant. |  |
Line of Credit Facility, Interest Rate Description | 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 |  |
Revolving credit facility amount | 60,000 |  |
Total Liquidity | $ 64,676 |  |
Unused commitment fee | 0.50% |  |
Line Of Credit Facility Collateral Fees | a collateral monitoring fee ranging from $1 thousand to $2 thousand, based on the then-applicable interest rate margin |  |

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- Definition Amount of the cost of borrowed funds accounted for as interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.9) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 9 -Article 9 + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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