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Organization and Summary of Significant Accounting Policies - Accounts Payable (Details) - USD ($) | Jun. 30, 2019 | Dec. 31, 2018
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Accounting Policies [Abstract] |  |
Research and development expenses | $ 753,629 | $ 240,064
Legal expenses | 82,018 | 0
Other | 127,617 | 68,996
Accounts payable | $ 963,264 | $ 309,060

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