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FAIR VALUE MEASUREMENTS (Tables) | 6 Months Ended
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Jun. 30, 2020
Fair Value Disclosures [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis | The following tables summarize assets that are measured at fair value on a recurring basis as of June 30, 2020 and December 31, 2019 (in thousands):
|  |  | Fair Value Measurement at Reporting Date Using |  |  |  |
| June 30, 2020 |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Assets: |  |  |  |  |  |  |
Cash equivalents | $ | 120,066 |  |  | $ | 120,066 |  |  | $ | — |  |  | $ | — |
Fair value option investments | — |  |  | — |  |  | — |  |  | — |
Liabilities: |  |  |  |  |  |  |
Contingent consideration | 278 |  |  | — |  |  | — |  |  | 278 |
|  |  | Fair Value Measurement at Reporting Date Using |  |  |  |
| December 31, 2019 |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Assets: |  |  |  |  |  |  |
Fair value option investments | $ | 1,405 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,405 |
Liabilities: |  |  |  |  |  |  |
Contingent consideration | 1,298 |  |  | — |  |  | — |  |  | 1,298 |
Schedule of Recurring Level 3 Fair Value Measurements | The following table provides a rollforward of the fair value of recurring Level 3 fair value measurements for the three and six months ended June 30, 2020 and 2019 (in thousands):
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Assets |  |  |  |  |  |  |
Fair value option investments: |  |  |  |  |  |  |
Beginning Balance | $ | — |  |  | $ | 32,494 |  |  | $ | 1,405 |  |  | $ | 73,902 |
Total gains (losses) included in earnings | — |  |  | (27,577) |  |  | (1,405) |  |  | (68,985) |
Ending Balance | $ | — |  |  | $ | 4,917 |  |  | $ | — |  |  | $ | 4,917 |
Unrealized gains (losses) still held (1) | $ | — |  |  | $ | (27,577) |  |  | $ | (1,405) |  |  | $ | (68,985) |
Available-for-sale securities - Redeemable preferred shares: |  |  |  |  |  |  |
Beginning Balance | $ | — |  |  | $ | 10,394 |  |  | $ | — |  |  | $ | 10,340 |
Total gains (losses) included in other comprehensive income (loss) | — |  |  | (193) |  |  | — |  |  | (139) |
Ending Balance | $ | — |  |  | $ | 10,201 |  |  | $ | — |  |  | $ | 10,201 |
Unrealized gains (losses) still held (1) | $ | — |  |  | $ | (193) |  |  | $ | — |  |  | $ | (139) |
Liabilities |  |  |  |  |  |  |
Contingent Consideration: |  |  |  |  |  |  |
Beginning Balance | $ | 1,219 |  |  | $ | 1,586 |  |  | $ | 1,298 |  |  | 1,529 |
Settlements of contingent consideration liabilities | (908) |  |  | (312) |  |  | (908) |  |  | (312) |
Total losses (gains) included in earnings | 2 |  |  | 5 |  |  | 6 |  |  | 27 |
Foreign currency translation | (35) |  |  | (40) |  |  | (118) |  |  | (5) |
Ending Balance | $ | 278 |  |  | $ | 1,239 |  |  | $ | 278 |  |  | 1,239 |
Unrealized gains (losses) still held (1) | $ | 2 |  |  | $ | 5 |  |  | $ | 6 |  |  | 27 |
(1)Represents the unrealized gains or losses recorded in earnings and/or other comprehensive income (loss) during the period for assets and liabilities classified as Level 3 that are still held (or outstanding) at the end of the period.

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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