Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Amortization to acquired intangible assets

The gross carrying amounts related to acquired intangible assets as of March 31, 2016 are as follows ($ in thousands):

	Net Carrying Amount			Weighted average  amortization period (years)
Patent Portfolios at December 31, 2015, net	$	9,799			4.63
Amortization expenses		(531	)
Patent Portfolios at March 31, 2016, net	$	9,268			4.38

The accumulated amortization related to acquired intangible assets for the three months ended March 31, 2016 and 2015 are as follows ($ in thousands):

	Amortization Expense for the Three Months Ended March 31,
Date Acquired and Description	2016		2015
7/24/13 - Rockstar patent portfolio	$	26	$	116
9/10/13 - North South patent portfolio		8		32
12/31/13 - Rockstar patent portfolio		497		2,274
	$	531	$	2,422

Future amortization of all patents

The future amortization of these intangible assets was based on the adjusted carrying amount. Future amortization of all patents is as follows ($ in thousands):

	Rockstar		North South		Rockstar
	Portfolio		Portfolio		Portfolio
	Acquired		Acquired		Acquired		Total
	24-Jul-13		10-Sep-13		31-Dec-13		Amortization
Nine Months Ended December 31, 2016	$	78	$	23	$	1,502	$	1,603
Year Ended December 31, 2017		104		30		1,995		2,129
Year Ended December 31, 2018		104		31		1,995		2,130
Year Ended December 31, 2019		104		31		1,995		2,130
Year Ended December 31, 2020		104		31		995		1,130
Thereafter		110		36		-		146
Total	$	604	$	182	$	8,482	$	9,268