The Company includes its intangible assets of customer relationship in the asset group associated with the CRJ-900 fleet operating under the American CPA and monitors for any indicators of impairment of the asset group. When certain conditions or changes in the economic situation exist, the asset group may be impaired if the carrying amount of the assets is not recoverable and that carrying amount exceeds the asset group’s fair value. Due to the impacts of the pilot shortage and the pilot wage increase, we evaluated all asset groups during the year ended September 30, 2023 and determined that the asset group for the CRJ-900 fleet operating under the American CPA was impaired. As a result, the Company recognized an impairment loss of $3.7 million and $1.9 million on the customer relationship related to the CRJ-900 fleet operating under the American CPA during the year ended September 30, 2023 and 2022, respectively, which was recorded in asset impairment on our consolidated statements of operations and comprehensive (loss) income. The Company did not record any impairment losses related to its intangible assets during the year ended September 30, 2021.

Information about the intangible assets of the Company at September 30, 2023 and 2022, is as follows (in thousands):


	September 30,		September 30,
	2023		2022
Customer relationship		—	$	43,800
Accumulated amortization		—		(38,029	)
Impairment		—		(1,929	)
Net carrying value	$	—	$	3,842

Total amortization expense recognized was approximately $0.1 million, $1.0 million, and $1.2 million, for the fiscal years ended September 30, 2023, 2022, and 2021, respectively. The Company recognized an impairment loss of $3.7 million on the customer relationship related to the American CPA during the year ended September 30, 2023, which was recorded in asset impairment on our condensed consolidated statements of operations and comprehensive loss. Accordingly, we expect to record amortization expense of zero for fiscal year 2024 and thereafter.