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CASH, CASH EQUIVALENTS AND INVESTMENTS (Details 2) (USD $) In Millions, except Per Share data, unless otherwise specified |  | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended |
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Dec. 31, 2013 | Dec. 31, 2013 Xalted Networks Maximum | Dec. 31, 2012 Xalted Networks Maximum | Dec. 31, 2013 Cortina Cost method investment Series A preferred stock | Mar. 31, 2007 Cortina Cost method investment Series D preferred convertible stock | Dec. 31, 2013 Cortina Cost method investment Series D preferred convertible stock | Dec. 31, 2012 Cortina Cost method investment Series D preferred convertible stock | Dec. 31, 2008 Cortina Cost method investment Series D preferred convertible stock | Oct. 31, 2004 GCT SemiConductor, Inc. Cost method investment Series D preferred convertible stock | Dec. 31, 2012 GCT SemiConductor, Inc. Cost method investment Series D preferred convertible stock | Dec. 31, 2013 GCT SemiConductor, Inc. Cost method investment Series D preferred convertible stock | Mar. 31, 2006 Xalted Networks Cost method investment | Aug. 31, 2005 Xalted Networks Cost method investment | May 31, 2005 Xalted Networks Cost method investment | Sep. 30, 2012 Xalted Networks Cost method investment | Dec. 31, 2011 Xalted Networks Cost method investment | Sep. 30, 2009 Xalted Networks Cost method investment | Dec. 31, 2013 Xalted Networks Cost method investment | Dec. 31, 2012 SBI Cost method investment | Mar. 31, 2011 SBI Cost method investment | Mar. 31, 2010 SBI Cost method investment | Dec. 31, 2013 SBI Cost method investment | Dec. 31, 2008 SBI Cost method investment | Mar. 31, 2007 ImmenStar, Inc. Cost method investment Series A preferred stock | Sep. 30, 2004 ImmenStar, Inc. Cost method investment Series A preferred stock | Dec. 31, 2008 ImmenStar, Inc. Cost method investment Series A preferred stock | Jun. 30, 2011 Kranem Corporation Xalted Networks
CASH, CASH EQUIVALENTS AND INVESTMENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire investments |  |  |  |  |  |  |  |  | $ 3.0 |  |  | $ 0.3 | $ 1.0 | $ 2.0 |  |  |  |  | $ 0.6 | $ 0.7 | $ 0.7 |  | $ 0.5 |  | $ 2.0 |  |
Shares of preferred stock of Cortina received in exchange for investment in ImmenStar Inc. |  |  |  |  | 3.6 |  |  | 0.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Per share price of investment | $ 2.77 |  |  |  | $ 0.837 |  |  | $ 0.837 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash received in exchange for investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.8 |  | 0.2 |
Investment, ownership interest (as a percent) |  | 10.00% | 10.00% |  |  | 1.00% | 1.00% |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% | 2.00% |  |  |  |
Other-than-temporary impairment charge |  |  |  | $ 0 |  |  |  |  |  | $ 2.2 | $ 0 |  |  |  | $ 0.8 | $ 0.5 | $ 1.7 | $ 0.3 |  |  |  | $ 0 |  |  |  |  |
Issued and outstanding stock ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 35.00%

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