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CONCENTRATION OF RISK, Revenues by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014 | Mar. 31, 2013
Concentration Risk [Line Items] |  |
Revenues | $ 37,839 | $ 14,976
UNITED STATES |  |
Concentration Risk [Line Items] |  |
Revenues | 167 | 755
South Korea [Member] |  |
Concentration Risk [Line Items] |  |
Revenues | 22,956 | 9,344
Japan [Member] |  |
Concentration Risk [Line Items] |  |
Revenues | 14,058 | 4,612
Taiwan [Member] |  |
Concentration Risk [Line Items] |  |
Revenues | 321 | 166
Other [Member] |  |
Concentration Risk [Line Items] |  |
Revenues | 337 | 99
All Countries [Domain] |  |
Concentration Risk [Line Items] |  |
Revenues | $ 37,672 | $ 14,221

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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). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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