Intangible Assets

6 Months Ended

Jun. 30, 2016

(2)	Intangible Assets

Intangible assets consist of the following (in thousands):

	June 30, 2016				December 31, 2015
	Gross carrying value		Accumulated amortization		Gross carrying value		Accumulated Amortization
Amortizable intangible assets Licensed technology	$	7,156	$	838	$	7,156	$	547

Amortization expense related to intangible assets totaled $146,000 and $291,000 for the three and six months ended June 30, 2016, respectively, and totaled $116,000 and $232,000 for the three and six months ended June 30, 2015, respectively. The aggregate estimated amortization expense for intangible assets remaining as of June 30, 2016 is as follows (in thousands):

2016	$	290
2017		582
2018		582
2019		582
2020		582
over 5 years		3,700
Total	$	6,318