Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Intangible Assets Tables

Intangible assets

(In thousands)	2018			2017			Weighted Average Total Amortization Period
Healthspan Research LLC Acquisition (See Note 9)	$	1,346		$	1,346		10 years
License agreements and other		1,625			1,494		9 years
Less accumulated depreciation		(1,424	)		(1,189	)
	$	1,547		$	1,651

Estimated aggregate amortization expense

(In thousands) Years ending December:
2019	$	246
2020		241
2021		222
2022		185
2023		156
Thereafter		497
	$	1,547