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Notes Payable:
12 Months Ended
Sep. 30, 2011
Notes Payable:  
Notes Payable:

11. Notes Payable:

        The Company entered into a $4,335,000 loan agreement dated August 1, 2000 with the Chester County, Pennsylvania Industrial Development Authority. The purpose of the loan was to fund the construction of the Company's new office and manufacturing facility. The loan was scheduled to mature in 2015 and carried an interest rate set by the remarketing agent that was consistent with 30-day tax-exempt commercial paper. The Company exercised its option to pay-down the outstanding balance in August, 2009.

        The interest cost related to this debt for fiscal years 2011, 2010 and 2009 was $0, $0 and $45,000, respectively. The Company was required to maintain a letter of credit in the amount of $5,000,000 covering the debt prior to the August, 2009 retirement.