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Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Total Assets | $ 157,731 | $ 74,280
Marketable Securities |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Total Assets | 143,505 | 59,844
Equity Investments |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Total Assets | 14,226 | 14,436
Level 1 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Total Assets | 12,257 | 14,328
Level 1 | Equity Investments |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Total Assets | 12,257 | 14,328
Level 2 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Total Assets | 143,505 | 59,844
Level 2 | Marketable Securities |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Total Assets | 143,505 | 59,844
Level 3 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Total Assets | 1,969 | 108
Level 3 | Equity Investments |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Total Assets | $ 1,969 | $ 108

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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