Intangible Assets

3 Months Ended

Mar. 31, 2016

Intangible Assets

Intangible Assets

9. Intangible Assets

The following table presents intangible assets as of December 31, 2015 and March 31, 2016 (in thousands):

		December 31,		March 31,
	2015		2016		Estimated useful life
Intangible asset - OPKO milestone	$	15,000	$	15,000	8	Years
Less accumulated amortization		(268)		(732)
Total intangible asset, net	$	14,732	$	14,268

The Company recorded $0.5 million in amortization expense related to this intangible asset during the three months ended March 31, 2016.   Estimated future amortization expense for intangible assets as of March 31, 2016 is $1.4 million for the remainder of 2016, $1.9 million per year for 2017,  2018,  2019, and 2020, and $5.5 million thereafter.