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Short-Term Investments | 12 Months Ended
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Dec. 31, 2014
Short-Term Investments | 4. SHORT-TERM INVESTMENTS The Company classified certain short-term investments as trading securities in 2012, 2013 and 2014. Realized gains on sales of these trading securities were US$2 thousand, US$4 thousand and US$4 thousand for the years ended December 31, 2012, 2013 and 2014, respectively. The amount of unrealized losses related to trading securities at year end were US$118 thousand, nil and nil for the years ended December 31, 2012, 2013 and 2014, respectively. Structured notes matured in May 2013 and the Company recognized the gain of US$118 thousand.

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