8. Other assets:

Other assets consist of the following:

	September 30,		September 30,
	2013		2012
Intangible assets, net of accumulated amortization of $495,037 and $441,637 at September 30, 2013 and September 30, 2012	$	105,200	$	158,600

Other non-current assets	116,333		—
	$	221,533	$	158,600

Intangible assets consist of licensing and certification rights which are amortized over a defined number of units. No impairment charges were recorded in fiscal 2013, 2012 or 2011.

Total intangible amortization expense was approximately $0.1 million in each of fiscal years 2013, 2012 and 2011. 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 are advanced payments made to vendors to secure end-of-life purchases of materials that are not expected to be applied during the next twelve months.