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Other assets: | 12 Months Ended
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Sep. 30, 2012
Other assets: |
Other assets: |
7. Other assets: Other assets consist of the following:
|  | September 30, 2012 |  | September 30, 2011 |
--- | --- | --- | --- | --- | ---
Intangible assets, net of accumulated amortization of $441,637 and $391,829 at September 30, 2012 and September 30, 2011 |  | $ | 158,600 |  | $ | 208,408 |
Intangible assets consist of licensing and certification rights which are amortized over a defined number of units. The Company had no non-cash purchases of other assets in 2012, 2011 and 2010. No impairment charges were recorded in fiscal 2012, 2011 or 2010. Total intangible amortization expense was approximately $0.1 million, $0.1 million and $0.1 million for fiscal 2012, 2011 and 2010, respectively. Since the intangible assets are being amortized over a defined number of units, the timing of future amortization expense is not determinable.

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