Long-Term Debt	12 Months Ended
Sep. 30, 2017
Debt Disclosure [Abstract]
Long-Term Debt	10. Long-Term Debt The Company had no long-term debt outstanding at September 30, 2017, 2016 and 2015. On March 2, 2011, the Company entered into a credit agreement with Frost Bank with borrowing availability of $50.0 million (the “Credit Agreement”). On May 4, 2015, the Company amended the Credit Agreement which reduced its borrowing availability to $30.0 million with amounts available for borrowing determined by a borrowing base. The borrowing base is determined based upon certain of the Company’s and its U.S. subsidiaries’ assets which include (i) 80% of certain accounts receivable plus (ii) 50% of certain notes receivable (such result not to exceed $10 million) plus (iii) 25% of certain inventories (excluding work-in-process inventories). As of September 30, 2017, the Company’s borrowing base was $24.1 million. As of September 30, 2017, the amount available for borrowing was $23.8 after consideration of $0.3 million of outstanding letters of credit. The Company’s domestic subsidiaries have guaranteed the obligations of the Company under the Credit Agreement and such subsidiaries have secured their obligations under such guarantees by the pledge of substantially all of the assets of such subsidiaries, except real property assets. The Company is required to make monthly interest payments on borrowed funds. The Credit Agreement as amended limits the incurrence of additional indebtedness, requires the maintenance of a single financial ratio that compares certain of the Company’s assets to certain of its liabilities, restricts the Company and its subsidiaries’ ability to pay cash dividends and contains other covenants customary in agreements of this type. The interest rate for borrowings under the Credit Agreement as amended is based on the Wall Street Journal prime rate, which was 4.25% at September 30, 2017. At September 30, 2017, the Company was in compliance with all covenants under the Credit Agreement. On October 25, 2017, the Company entered into another amendment to the Credit Agreement which extended its maturity from May 4, 2018 to April 30, 2019. The amendment also modified the borrowing base to be determined based upon certain of the Company’s assets which include (i) 80% of certain accounts receivable plus (ii) 50% of certain notes receivable (such result not to exceed $10 million) plus (iii) 25% of certain inventories (such result not to exceed $20 million) and requires the Company to maintain unencumbered liquid assets of $10 million. The amendment also removed a requirement that the Company maintain a financial ratio that compares certain of the Company’s assets to certain of its liabilities and imposed a new financial covenant that the Company maintain a minimum amount of certain liquid assets.

10. Long-Term Debt

The Company had no long-term debt outstanding at September 30, 2017, 2016 and 2015.

On March 2, 2011, the Company entered into a credit agreement with Frost Bank with borrowing availability of $50.0 million (the “Credit Agreement”). On May 4, 2015, the Company amended the Credit Agreement which reduced its borrowing availability to $30.0 million with amounts available for borrowing determined by a borrowing base. The borrowing base is determined based upon certain of the Company’s and its U.S. subsidiaries’ assets which include (i) 80% of certain accounts receivable plus (ii) 50% of certain notes receivable (such result not to exceed $10 million) plus (iii) 25% of certain inventories (excluding work-in-process inventories). As of September 30, 2017, the Company’s borrowing base was $24.1 million. As of September 30, 2017, the amount available for borrowing was $23.8 after consideration of $0.3 million of outstanding letters of credit. The Company’s domestic subsidiaries have guaranteed the obligations of the Company under the Credit Agreement and such subsidiaries have secured their obligations under such guarantees by the pledge of substantially all of the assets of such subsidiaries, except real property assets. The Company is required to make monthly interest payments on borrowed funds. The Credit Agreement as amended limits the incurrence of additional indebtedness, requires the maintenance of a single financial ratio that compares certain of the Company’s assets to certain of its liabilities, restricts the Company and its subsidiaries’ ability to pay cash dividends and contains other covenants customary in agreements of this type. The interest rate for borrowings under the Credit Agreement as amended is based on the Wall Street Journal prime rate, which was 4.25% at September 30, 2017. At September 30, 2017, the Company was in compliance with all covenants under the Credit Agreement.

On October 25, 2017, the Company entered into another amendment to the Credit Agreement which extended its maturity from May 4, 2018 to April 30, 2019. The amendment also modified the borrowing base to be determined based upon certain of the Company’s assets which include (i) 80% of certain accounts receivable plus (ii) 50% of certain notes receivable (such result not to exceed $10 million) plus (iii) 25% of certain inventories (such result not to exceed $20 million) and requires the Company to maintain unencumbered liquid assets of $10 million. The amendment also removed a requirement that the Company maintain a financial ratio that compares certain of the Company’s assets to certain of its liabilities and imposed a new financial covenant that the Company maintain a minimum amount of certain liquid assets.