Goodwill represents the excess of the purchase price over the fair values of the assets acquired and liabilities assumed in a business combination, at the date of acquisition. Goodwill is not amortized but is tested for potential impairment at the reporting unit level, at a minimum on an annual basis in the fourth fiscal quarter, or when indications of potential impairment exist. All of our goodwill is within our North America Solutions reportable segment.

During the three months ended December 31, 2024, there were no additions or impairments to goodwill. As of December 31, 2024 and September 30, 2024, the goodwill balance was $45.7 million.

Finite-lived intangible assets are amortized using the straight-line method over the period in which these assets contribute to our cash flows and are evaluated for impairment in accordance with our policies for valuation of long-lived assets. Our intangible assets are within our North America Solutions reportable segment and consist of the following:


		December 31, 2024						September 30, 2024
(in thousands)	Weighted Average Estimated Useful Lives	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Finite-lived intangible asset:
Developed technology	15 years	$	89,096	$	41,536	$	47,560	$	89,096	$	40,047	$	49,049
Intellectual property	13 years	2,000		702		1,298		2,000		662		1,338
Trade name	20 years	5,865		2,176		3,689		5,865		2,105		3,760
		$	96,961	$	44,414	$	52,547	$	96,961	$	42,814	$	54,147

Amortization expense in the Unaudited Condensed Consolidated Statements of Operations was $1.6 million for the three months ended December 31, 2024 and 2023, respectively.