Intangible assets (Tables)

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets are recorded at cost, or when acquired as a part of a business combination, at estimated fair value, less accumulated amortization. These assets are amortized on a straight-line basis over the useful lives of the assets, which the Company believes is materially consistent with the pattern of economic benefit provided by the assets.


		December 31,
(U.S. Dollars, in thousands)	Weighted Average Amortization Period	2023			2022
Cost
Developed technology	7.9 years	$	92,416		$	43,699
Patents	10.0 years		43,262			40,108
IPR&D	Indefinite		4,674			300
Customer relationships	12.1 years		49,197			15,572
License and other	9.6 years		24,584			23,295
Trademarks—finite lived	10.0 years		1,797			1,875
	9.5 years		215,930			124,849
Accumulated amortization
Developed technology		$	(28,898	)	$	(17,830	)
Patents			(40,494	)		(37,506	)
Customer relationships			(11,988	)		(6,938	)
License and other			(16,240	)		(14,386	)
Trademarks—finite lived			(820	)		(801	)
			(98,440	)		(77,461	)
Intangible assets, net		$	117,490		$	47,388

Schedule of Future Amortization Expense

Future amortization expense for intangible assets is estimated as follows:


(U.S. Dollars, in thousands)	Amortization
2024	$	20,948
2025		19,849
2026		18,810
2027		18,426
2028		14,890
Thereafter		19,893
Total finite-lived intangible assets, net	$	112,816
Indefinite-lived intangible assets, net		4,674
Intangible assets, net	$	117,490