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Investment in Eton Pharmaceuticals, Inc. and Agreements - Related Party Transactions - Schedule of Condensed Balance Sheet (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Current assets | $ 11,684 | $ 8,806
Total assets | 28,289 | 23,917
Total liabilities | 23,836 | 21,302
Total liabilities and stockholders' equity | 28,289 | $ 23,917
Eton Pharmaceuticals, Inc. [Member] |  |
Current assets | 6,803 |
Non current assets | 722 |
Total assets | 7,525 |
Total liabilities | 1,193 |
Total preferred stock and stockholders' equity | 6,332 |
Total liabilities and stockholders' equity | $ 7,525 |

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