Other Assets

12 Months Ended

Sep. 30, 2021

Other Assets

Other Assets

7.  Other Assets

Other assets consist of the following:

	September 30,		September 30,
	2021		2020
Intangible assets, net of accumulated amortization of $634,032 at September 30, 2021 and $583,655 at September 30, 2020	$	62,474	$	112,851
Operating lease right-of-use assets		42,976		45,126
Other non-current assets		82,834		91,566
	$	188,284	$	249,543

Intangible assets consist of licensing and certification rights which are amortized over a defined number of units. No impairment charges were recorded in fiscal 2021, 2020 or 2019.

Total intangible amortization expense was $50,377, $32,618 and $19,400 in fiscal years 2021, 2020 and 2019, respectively. 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, 2021 and September 30, 2020 include the security deposit for an airplane hangar, and a deposit for medical claims required under the Company’s medical plan. In addition, other non-current assets include $7,535 and $16,266 of prepaid software licenses, that will be earned upon the shipment of a certain product to a customer, as of September 30, 2021, and September 30, 2020, respectively.