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Intangible assets

3 Months Ended

Mar. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets

The Company's intangible assets consist of products acquired via business combinations or asset acquisitions. The following table summarizes the Company's intangible assets for the periods ended March 31, 2022 and December 31, 2021:


		March 31, 2022						December 31, 2021
Asset Type	Estimated Life	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
Products	9-22 years	$	798.0	$	207.4	$	590.6	$	798.0	$	193.5	$	604.5
Customer relationships	8 years	28.6		28.6		—		28.6		28.6		—
CDMO	8 years	5.5		5.5		—		5.5		5.4		0.1
Total intangible assets		$	832.1	$	241.5	$	590.6	$	832.1	$	227.5	$	604.6

Amortization expense associated with the Company's intangible assets was recorded as follows:


	Three Months Ended March 31,
	2022		2021
Amortization Expense	$	14.0	$	14.9

As of March 31, 2022, the weighted average amortization period remaining for intangible assets was 11.7 years.

The following table provides a roll forward of changes in our goodwill balance:



Goodwill, December 31, 2021	$	224.9
Foreign currency translation	—
Goodwill, March 31, 2022	$	224.9

The carrying amount of goodwill included accumulated impairments of $41.7 million as of March 31, 2022 and December 31, 2021, respectively.