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Other Assets | 12 Months Ended
--- | ---
Sep. 30, 2017
Other Assets |
Other Assets | 8. Other Assets Other assets consist of the following:
|  | September 30, |  | September 30, |
|  | 2017 |  | 2016 |
Intangible assets, net of accumulated amortization of $531,637 and $529,037 at September 30, 2017 and September 30, 2016 |  | $ | 68,600 |  | $ | 71,200 |
Other non-current assets |  | 118,715 |  | 85,748 |
|  | $ | 187,315 |  | $ | 156,948 |
Intangible assets consist of licensing and certification rights which are amortized over a defined number of units. No impairment charges were recorded in fiscal 2017, 2016 or 2015. Total intangible amortization expense was approximately $2,600 in fiscal year 2017, $12,000 in fiscal year 2016 and $17,000 in fiscal year 2015. 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, 2017 and September 30, 2016 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. In addition, other non-current assets as of September 30, 2017 includes $43,000 of prepaid software licenses that will be earned upon the shipment of a certain product to a customer.

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