Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Other Intangible Assets

The changes in the carrying amounts of goodwill for the years ended December 31, 2019 and 2018 were as follows (in thousands):


	Year Ended
	December 31,
	2019		2018
Beginning balance	$	51,967	$	53,563
Currency translation adjustments		(813)		(1,596)
Ending balance	$	51,154	$	51,967

Schedule of Identifiable Intangible Assets

Purchased intangible assets consisted of the following as of December 31, 2019 and 2018 (in thousands):


	December 31, 2019						December 31, 2018
	Gross						Gross
	Carrying		Accumulated		Intangible		Carrying		Accumulated		Intangible
	Amount		Amortization		Assets, Net		Amount		Amortization		Assets, Net
Finite-lived intangible assets:
Proprietary adjuvant technology	$	7,985	$	(2,562)	$	5,423	$	8,357	$	(2,263)	$	6,094
Collaboration agreements		3,606		(3,448)		158		3,773		(3,326)		447
Total identifiable intangible assets	$	11,591	$	(6,010)	$	5,581	$	12,130	$	(5,589)	$	6,541

Schedule of Estimated Amortization Expense

Amortization expense for the years ended December 2019, 2018 and 2017 was $0.7 million, $0.7 million and $2.2 million, respectively. Estimated amortization expense for existing intangible assets for each of the five succeeding years ending December 31, is as follows (in thousands):


Year	Amount
2020	$	557
2021		399
2022		399
2023		399
2024		399