Segments and Major Customers (Tables)

12 Months Ended

Dec. 31, 2017

Concentration Risk

Reported segment revenues, and reported segment operating income (loss)

The tables below present reported segment operating income (loss) for the years ended December 31, 2017, 2016 and 2015:

	For the Year Ended December 31, 2017
	MID		RSD		Other			Total
	(In thousands)
Revenues	$	280,704	$	96,663	$	15,729		$	393,096
Segment operating expenses	86,044		50,010		33,860			169,914
Segment operating income (loss)	$	194,660	$	46,653	$	(18,131	)	$	223,182
Reconciling items								(168,775		)
Operating income								$	54,407
Interest and other income (expense), net								(13,418		)
Income before income taxes								$	40,989

	For the Year Ended December 31, 2016
	MID		RSD		Other			Total
	(In thousands)
Revenues	$	239,843	$	76,175	$	20,579		$	336,597
Segment operating expense	68,460		51,855		30,397			150,712
Segment operating income (loss)	$	171,383	$	24,320	$	(9,818	)	$	185,885
Reconciling items								(152,243		)
Operating income								$	33,642
Interest and other income (expense), net								(11,005		)
Income before income taxes								$	22,637

	For the Year Ended December 31, 2015
	MID		RSD		Other			Total
	(In thousands)
Revenues	$	221,968	$	50,497	$	23,813		$	296,278
Segment operating expenses	47,780		29,056		32,147			108,983
Segment operating income (loss)	$	174,188	$	21,441	$	(8,334	)	$	187,295
Reconciling items								(115,875		)
Operating income								$	71,420
Interest and other income (expense), net								(11,189		)
Income before income taxes								$	60,231

Revenue from external customer by geographic regions

Revenue from customers in the geographic regions based on the location of contracting parties is as follows:

	Years Ended December 31,
	2017		2016		2015
	(In thousands)
USA	$	165,263	$	121,209	$	118,278
South Korea	115,811		129,542		115,486
Japan	23,378		30,215		29,687
Europe	22,597		16,031		9,616
Canada	4,373		3,478		214
Singapore	22,554		17,908		16,312
Asia-Other	39,120		18,214		6,685
Total	$	393,096	$	336,597	$	296,278

Accounts Receivable [Member]

Concentration Risk

Schedule of customer accounts representing 10% or more than 10% of total revenue

Accounts receivable from the Company's major customers representing 10% or more of total accounts receivable at December 31, 2017 and December 31, 2016, respectively, was as follows:

	As of December 31,
Customer	2017		2016
Customer 1 (MID reportable segment)	*		13	%
Customer 2 (Other segment)	12	%	12	%
Customer 3 (MID and RSD reportable segment)	13	%	*
Customer 4 (RSD reportable segment)	*		17	%
Customer 5 (RSD reportable segment)	11	%	*

_________________________________________

*    Customer accounted for less than 10% of total accounts receivable in the period

Sales, net

Concentration Risk

Schedule of customer accounts representing 10% or more than 10% of total revenue

Revenue from the Company’s major customers representing 10% or more of total revenue for the years ended December 31, 2017, 2016 and 2015 were as follows:

	Years Ended December 31,
	2017		2016		2015
Customer A (MID and RSD reportable segments)	17	%	19	%	20	%
Customer B (MID reportable segment)	13	%	20	%	19	%
Customer C (MID reportable segment)	13	%	13	%	13	%