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Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2019
Accounting Policies [Abstract] |
Summarized Financial Information for the Equity Method Investments | Summarized financial data as of March 31, 2019 and December 31, 2018 and for the three months ended March 31, 2019 and 2018, for the Company's equity method investments are shown in the following tables.
| March 31, 2019 |  | December 31, 2018
Current assets | $ | 10,753 |  |  | $ | 17,485 |
Noncurrent assets | 32,935 |  |  | 31,274 |
Total assets | 43,688 |  |  | 48,759 |
Current liabilities | 3,766 |  |  | 4,226 |
Net assets | $ | 39,922 |  |  | $ | 44,533 |
| Three Months Ended March 31,
| 2019 |  | 2018
Revenues | $ | 98 |  |  | $ | 67 |
Operating expenses | 5,377 |  |  | 8,610 |
Operating loss | (5,279 | ) |  | (8,543 | )
Other, net | 4 |  |  | 14 |
Net loss | $ | (5,275 | ) |  | $ | (8,529 | )

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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