Geographic / Customer Concentration (Tables)

12 Months Ended

Dec. 31, 2019

GEOGRAPHIC CUSTOMER CONCENTRATION [Abstract]

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas

The table below lists the countries of the headquarters of our licensees and customers and the total revenue derived from each country or region for the periods indicated (in thousands):

	For the Year Ended December 31,
	2019		2018		2017
United States	$	139,162	$	119,159	$	194,184
South Korea	113,189		112,291		113,059
Japan	35,614		29,525		25,210
China	11,103		309		77,087
Sweden	6,934		6,933		6,935
France	5,895		277		—
Other Europe	5,810		5,116		6,305
Taiwan	938		23,326		36,051
Other Asia	279		468		—
Finland	—		10,000		—
Canada	—		—		74,107
Total	$	318,924	$	307,404	$	532,938

Schedule of Revenue by Major Customers by Reporting Segments

During 2019, 2018 and 2017, the following licensees or customers accounted for 10% or more of total revenues:

	2019		2018		2017
Apple	35	%	36	%	21	%
Samsung	25	%	25	%	13	%
LG	10	%	10	%	< 10%
Blackberry (a)	—	%	—	%	13	%
Huawei (b)	—	%	—	%	14	%

(a) 2017 revenue include $70.7 million of non-current patent royalties.

(b) 2017 revenue include $8.4 million of non-current patent royalties.