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CONCENTRATION OF RISK (Tables)

12 Months Ended

Dec. 31, 2016

Risks And Uncertainties [Abstract]

Revenues and Accounts Receivable From Our Largest Customers

Revenues and accounts receivable from the Company's largest customers for the years ended December 31 were as follows (in thousands):

		2016								2015								2014
Customer		% of Total Revenue				Accounts Receivable				% of Total Revenue				Accounts Receivable				% of Total Revenue				Accounts Receivable
A			63%			$	12,050				62%			$	13,355				54%			$	8,550
B			28%				9,128				25%				8,477				19%				7,598
C			4%				1,427				1%				1,564				1%				540

Revenues by Geographic Area

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

		Year Ended December 31,
Country		2016				2015				2014
South Korea		$	181,771			$	168,267			$	141,922
China			7,180				2,685				1,260
Japan			4,310				16,542				44,903
Other non-U.S. locations			1,849				2,334				2,240
Total non-U.S. locations		$	195,110			$	189,828			$	190,325
United States			3,776				1,218				706
Total revenue		$	198,886			$	191,046			$	191,031

Long-Lived Assets (Net) by Geographic Area

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

		2016				2015
United States		$	26,917			$	22,187
Other			286				220
Total long-lived assets		$	27,203			$	22,407