Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amounts of goodwill for the years ended December 31, 2018 and 2017 were as follows (in thousands):

	Year Ended December 31,
	2018			2017
Beginning balance	$	53,563		$	51,673
Currency translation adjustments		(1,596	)		1,890
Ending balance	$	51,967		$	53,563

Schedule of Identifiable Intangible Assets

Purchased intangible assets consisted of the following as of December 31, 2018 and 2017 (in thousands):

	December 31, 2018							December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Intangible Assets, Net		Gross Carrying Amount		Accumulated Amortization			Intangible Assets, Net
Finite-lived intangible assets:
Proprietary adjuvant technology	$	8,357	$	(2,263	)	$	6,094	$	9,086	$	(2,006	)	$	7,080
Collaboration agreements		3,773		(3,326	)		447		4,103		(3,310	)		793
Total identifiable intangible assets	$	12,130	$	(5,589	)	$	6,541	$	13,189	$	(5,316	)	$	7,873

Schedule of Estimated Amortization Expense

Estimated amortization expense for existing intangible assets for each of the five succeeding years ending December 31, is as follows (in thousands):

Year	Amount
2019	$	700
2020		583
2021		418
2022		418
2023		418