The Company accounts for goodwill at acquisition-date fair value and other finite intangibles at acquisition-date fair value less accumulated amortization. See Note 1 for a summary of the Company’s policies relating to goodwill and intangible assets.

The Company’s intangible assets, net consists of the following, in thousands:


		March 31,			September 30,
	Amortization Period	2024			2023
Backlog	1 year	$	2,100		$	2,100
Customer relationships	6-10 years		4,409			4,409
Developed technology	5 years		6,700			6,700
Noncompetition agreements	5 years		200			200
Trade names	3-15 years		2,679			2,679
			16,088			16,088
Accumulated amortization			(5,268	)		(4,785	)
Less asset impairments:
Backlog			(425	)		(425	)
Customer relationships			(339	)		(119	)
Developed technology			(5,494	)		(4,645	)
Noncompetition agreements			(160	)		—
Trade names			(50	)		—
Intangible assets, net		$	4,352		$	6,114

The estimated aggregate amortization expense for each of the five succeeding fiscal years as of March 31, 2024 is as follows, thousands:


Year ending September 30:	Amount
2024	$	348
2025		511
2026		511
2027		511
2028		511
Thereafter		1,960
Total	$	4,352

The aggregate amortization expense during the three months ended March 31, 2024 and 2023 was $0.2 million and $1.0 million, respectively. The aggregate amortization expense during the six months ended March 31, 2024 and 2023 were $0.5 million and $1.0 million, respectively.

During each fiscal year, we periodically assess whether any indicators of impairment existed related to our intangible assets. At the end of December 2023, we identified a triggering event. As a result of the decline in our stock price as of December 31, 2023, our book value materially exceeded our market value. This triggering event indicated we should test the related long-lived assets for impairment in our Material and Substrate segment. We tested each identified asset group within our Material and Substrate segment by first performing a recoverability test, comparing projected undiscounted cash flows from the use and eventual disposition of each asset group to its carrying value. This test indicated that the undiscounted cash flows were not sufficient to recover the carrying value of certain asset groups. We then compared the carrying value of the individual long-lived assets within those asset groups against their fair value in order to determine if impairment existed. Determining the fair value of those asset groups involves the use of significant estimates and assumptions, including projections of revenues and expenses and related cash flows based on assumed long-term growth rates and demand trends, and estimated discount rates based on the asset group's weighted average return on assets, as derived from various methods. The fair value of the intangible assets were estimated using various valuation methodologies, including the multi-period excess earnings method, the relief from royalty method and the distributor method. These fair value measurements fall under Level 3 of the fair value hierarchy. As a result, we recorded a total impairment charge for intangible assets in our Materials and Substrate

segment of $1.3 million during the quarter ended December 31, 2023. This impairment charge relates to developed technology, trade name, customer relationships and non-competition agreements at Entrepix.

The Company evaluates goodwill at the reporting unit level, which, for the Company, is at the level of the reportable segments, semiconductor and material and substrate. The changes in carrying amount of goodwill allocated to each of the reporting units for the six months ended March 31, 2024 is as follows, in thousands:


	Semiconductor		Material and Substrate			Total Goodwill
Goodwill	$	5,905	$	21,726		$	27,631
Accumulated impairment losses		—		—			—
Balance at September 30, 2023		5,905		21,726			27,631
Goodwill acquired		—		—			—
Impairment of goodwill		—		(6,370	)		(6,370	)
Balance at March 31, 2024	$	5,905	$	15,356		$	21,261
Goodwill	$	5,905	$	21,726		$	27,631
Accumulated impairment losses		—		(6,370	)		(6,370	)
Balance at March 31, 2024	$	5,905	$	15,356		$	21,261

During each fiscal year, we periodically assess whether any indicators of impairment exist which would require us to perform an interim impairment review. At the end of December 2023, we identified a triggering event. As a result of the decline in our stock price as of December 31, 2023, our book value materially exceeded our market value. This triggering event indicated we should test goodwill for impairment. The results of the goodwill impairment test indicated that the book value of our Material and Substrate reporting unit was in excess of the fair value, and, thus, was impaired. There was no impairment of goodwill identified for our Semiconductor reporting unit. As of the three months ended March 31, 2024, there was no new impairment of goodwill for either the Material and Substrate reporting unit or the Semiconductor reporting unit.

Determining the fair value of a reporting unit involves the use of significant estimates and assumptions. Our goodwill impairment test uses a weighting of the income approach and the market approach to estimate a reporting unit’s fair value. The income approach is based on a discounted future cash flow analysis that uses certain assumptions including: projections of revenues and expenses and related cash flows based on assumed long-term growth rates and demand trends; expected future investments and working capital requirements to sustain and grow the business; and estimated discount rates based on the reporting unit’s weighted average cost of capital as derived by the Capital Asset Pricing Model and other methods, which includes observable market inputs and other data from identified comparable companies. The same estimates are also used internally for our capital budgeting process, and for long-term and short-term business planning and forecasting. We test the reasonableness of the inputs and outcomes of our discounted cash flow analysis against available comparable market data, and we also perform a reconciliation of our total market capitalization to the estimated fair value of all of our reporting units. The market approach is based on the application of appropriate market-derived multiples selected from (i) comparable publicly-traded companies and/or (ii) the implied transaction multiples derived from identified merger and acquisition activity in the market. Multiples are then selected based on a comparison of the reviewed data to that of the reporting unit and applied to relevant historical and forecasted financial parameters such as levels of revenues, EBITDA, EBIT or other metrics. The calculation of fair value falls under Level 3 of the fair value hierarchy.

If the future performance of these reporting units fall short of our expectations, if there are significant changes in operations due to changes in market conditions or if our stock price continues to decline, we could be required to recognize additional material impairment charges in future periods.