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SIGNIFICANT CUSTOMERS AND GEOGRAPHIC NET REVENUES Geograpic Net Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue by Geography
Total net revenues	$ 109,664	$ 89,188
United States of America
Revenue by Geography
Total net revenues	2,713	2,672
Hong Kong/China
Revenue by Geography
Total net revenues	60,413	47,229
Taiwan
Revenue by Geography
Total net revenues	6,479	6,672
Korea
Revenue by Geography
Total net revenues	10,357	8,542
Western Europe (excluding Germany)
Revenue by Geography
Total net revenues	10,035	10,901
Japan
Revenue by Geography
Total net revenues	3,905	3,650
Germany
Revenue by Geography
Total net revenues	5,567	4,927
Other
Revenue by Geography
Total net revenues	$ 10,195	$ 4,595

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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