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Commitments and Contingencies: (Details 2) (USD $) |  |  | 0 Months Ended |  | 0 Months Ended |  |  | 12 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011 Breach of contract and violation of the Pennsylvania Wage Payment and Collection Law Pending lawsuit | Sep. 30, 2013 Breach of contract and violation of the Pennsylvania Wage Payment and Collection Law Pending lawsuit | Dec. 17, 2013 American Airlines, Inc. ("AAI") | Sep. 30, 2013 American Airlines, Inc. ("AAI") | Nov. 29, 2011 American Airlines, Inc. ("AAI") | Sep. 30, 2013 Net sales Major Customers | Sep. 30, 2012 Net sales Major Customers | Sep. 30, 2011 Net sales Major Customers | Sep. 30, 2013 Net sales Major Customers American Airlines, Inc. ("AAI") | Sep. 30, 2012 Net sales Major Customers American Airlines, Inc. ("AAI") | Sep. 30, 2011 Net sales Major Customers American Airlines, Inc. ("AAI")
Legal Proceedings |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration of risk (as a percent) |  |  |  |  |  |  |  | 64.00% | 63.00% | 61.00% | 14.00% | 5.00% | 8.00%
Pre-bankruptcy outstanding accounts receivable | $ 4,489,434 | $ 3,978,512 |  |  |  | $ 760,000 | $ 760,000 |  |  |  |  |  |
Collection of accounts receivable |  |  |  |  | 760,000 |  |  |  |  |  |  |  |
Amount of damages claimed |  |  | 583,000 |  |  |  |  |  |  |  |  |  |
Estimated liability |  |  |  | $ 657,000 |  |  |  |  |  |  |  |  |

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