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Investment in Melt Pharmaceuticals, Inc. and Agreements - Related Party Transactions - Schedule of Condensed Balance Sheet (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Current assets | $ 38,505 | $ 32,843 |  |
Total assets | 66,510 | 49,451 |  |
Total liabilities | 29,476 | 24,700 |  |
Total stockholders' equity | 37,059 | 24,751 | $ 83 | $ 2,615
Total liabilities and stockholders' equity | 66,510 | $ 49,451 |  |
Melt Pharmaceuticals, Inc. [Member] |  |  |  |
Current assets | 10,269 |  |  |
Non current assets | 2 |  |  |
Total assets | 10,271 |  |  |
Total liabilities | 950 |  |  |
Total stockholders' equity | 9,321 |  |  |
Total liabilities and stockholders' equity | $ 10,271 |  |  |

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