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FAIR VALUE MEASUREMENTS (Tables) | 3 Months Ended
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Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of March 31, 2014 (in thousands):
|  |  |  | Fair Value Measurements, Using
|  | Total carrying value as of March 31, 2014 |  | Quoted prices in active markets (Level 1) |  | Significant other observable inputs (Level 2) |  | Significant unobservable inputs (Level 3)
Cash equivalents |  | $ | 11,801 |  |  | $ | 11,801 |  |  | $ | — |  |  | $ | — |
Short-term investments |  | 230,990 |  |  | 230,990 |  |  | — |  |  | — |
Long-term investments |  | 3,051 |  |  | 2,751 |  |  | — |  |  | 300 |
The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2013 (in thousands):
|  |  |  | Fair Value Measurements, Using
|  | Total carrying value as of December 31, 2013 |  | Quoted prices in active markets (Level 1) |  | Significant other observable inputs (Level 2) |  | Significant unobservable inputs (Level 3)
Cash equivalents |  | $ | 7,600 |  |  | $ | 7,600 |  |  | $ | — |  |  | $ | — |
Short-term investments |  | 202,024 |  |  | 202,024 |  |  | — |  |  | — |
Long-term investments |  | 7,417 |  |  | 3,117 |  |  | — |  |  | 4,300 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | The following table is a reconciliation of the changes in fair value of the Company’s investments in convertible notes for the three months ended March 31, 2014, which had been classified in Level 3 in the fair value hierarchy (in thousands):
|  | Three Months Ended March 31, 2014
Fair value of notes, beginning of period |  | $ | 4,300 |
Repayment of notes |  | (4,000 | )
Fair value of notes, end of period |  | $ | 300 |

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19190-110258 + Details
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