Debt (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Debt [Abstract]
Interest expense	$ 401	$ 449	$ 919	$ 1,055
Letters of Credit Outstanding	6,918		6,918
Line of Credit Facility, Remaining Borrowing Capacity	$ 8,513		$ 8,513
Debt Instrument [Line Items]
Line of Credit Facility, Initiation Date			Aug. 09, 2012
Line Of Credit Facility, Expiration Date			Aug. 09, 2017
LineOfCreditFacilityCovenantTerms			requirement that we maintain a Fixed Charge Coverage Ratio (as defined in the 2012 Credit Facility) of not less than 1.0:1.0 at any time that our Liquidity (defined as the aggregate amount of unrestricted cash and cash equivalents on hand plus Excess Availability (as defined in the 2012 Credit Facility)) or Excess Availability fall below stipulated levels.  Those levels were reduced under the Amendment from $20 million of Liquidity to $15 million and from $5 million of Excess Availability to $4 million. After June 30, 2014, the thresholds return to $20 million of Liquidity and $5 million of Excess Availability.
Line of Credit Facility, Interest Rate Description			The Amendment also decreased interest rates on outstanding advances under the Revolving Loan and amounts outstanding under the Term Loan by one percentage point, effective February 1, 2014.  Pursuant to the Amendment, amounts outstanding under the Term Loan bear interest at a per annum rate equal to Daily Three Month LIBOR (as defined in the 2012 Credit Facility), plus 4.00% through June 30, 2014, and thereafter Daily Three Month LIBOR plus an interest rate margin, as determined quarterly