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CONCENTRATION OF RISK (Tables)

6 Months Ended

Jun. 30, 2017

Risks And Uncertainties [Abstract]

Revenues and Accounts Receivable From Our Largest Customers

Revenues and accounts receivable from the Company's largest customers were as follows (in thousands):

		% of Revenues for the three months ended June 30,								% of Revenues for the six months ended June 30,								Accounts Receivable as of
Customer		2017				2016				2017				2016				June 30, 2017
A			73%				76%				66%				64%			$	20,210
B			17%				18%				23%				29%			$	10,587
C			5%				3%				4%				4%			$	3,561

Revenues by Geographic Area

Revenues by geographic area are as follows (in thousands):

		Three Months Ended June 30,								Six Months Ended June 30,
Country		2017				2016				2017				2016
South Korea		$	92,206			$	61,196			$	140,134			$	87,142
China			5,414				1,812				7,896				3,569
Japan			2,044				800				3,128				2,104
Other non-U.S. locations			822				405				1,534				1,018
Total non-U.S. locations		$	100,486			$	64,213			$	152,692			$	93,833
United States			2,027				179				5,387				262
Total revenue		$	102,513			$	64,392			$	158,079			$	94,095

Long-Lived Assets (Net) by Geographic Area

Long-lived assets (net), by geographic area are as follows (in thousands):

		June 30, 2017				December 31, 2016
United States		$	38,587			$	26,917
Other			104				286
Total long-lived assets		$	38,691			$	27,203