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Other Assets: | 12 Months Ended
--- | ---
Sep. 30, 2015
Other assets: |
Other assets: | 8. Other Assets: Other assets consist of the following:
|  | September 30, |  | September 30, |
|  | 2015 |  | 2014 |
Intangible assets, net of accumulated amortization of $517,037 and $499,837 at September 30, 2015 and September 30, 2014 |  | $ | 83,200 |  | $ | 100,400 |
Other non-current assets |  | 85,748 |  | 10,448 |
|  | $ | 168,948 |  | $ | 110,848 |
Intangible assets consist of licensing and certification rights which are amortized over a defined number of units. No impairment charges were recorded in fiscal 2015, 2014 or 2013. Total intangible amortization expense was approximately $17,000 in fiscal year 2015, $5,000 in fiscal year 2014 and $0.1 million in fiscal year 2013. The timing of future amortization expense is not determinable because the intangible assets are being amortized over a defined number of units. Other non-current assets as of September 30, 2015 include the security deposit and advance payment of the last month’s rent due under an operating lease for the property located at 180 Gordon Drive, Exton, PA, and a deposit for medical claims required under the Company’s medical plan. As of September 30, 2014, the other non-current assets consisted of the security deposit and advance payment of the last month’s rent due under an operating lease for the property located at 180 Gordon Drive, Exton, PA.

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