There was no change to goodwill during the six months ended June 30, 2026. Other intangible assets consisted of the following:


	June 30, 2026						December 31, 2025
	Gross				Net		Gross				Net
	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Value		Amortization		Value		Value		Amortization		Value
	(in thousands)
Product technology and intellectual property	$	29,549	$	22,432	$	7,117	$	29,549	$	21,290	$	8,259
Trademarks, tradenames and licenses		3,767		2,745		1,022		3,767		2,599		1,168
Customer relationships		39,513		17,787		21,726		39,366		16,356		23,010
Other intangible assets		2,393		1,714		679		2,255		1,603		652

Total identifiable intangible assets	$	75,222	$	44,678	$	30,544	$	74,937	$	41,848	$	33,089

Intangible assets consist primarily of customer relationships, purchased developed technology, trademarks, licenses, and non-compete provisions, and are amortized over their estimated useful lives. The weighted-average amortization period for these intangibles as of June 30, 2026, is 7.8 years. The Company includes amortization expense in general and administrative expense as follows:


	Three months ended June 30,				Six months ended June 30,
	2026		2025		2026		2025
	(in thousands)				(in thousands)
Amortization expense	$	1,415	$	1,437	$	2,830	$	2,857

Estimated amortization expense for the remainder of 2026, and for each of the next five fiscal years, based upon intangible assets at June 30, 2026, is as follows:


	Year ended December 31,
	2026		2027		2028		2029		2030		2031
	(in thousands)
Amortization expense	$	2,806	$	5,340	$	4,883	$	4,839	$	3,797	$	2,662