Summary of Significant Accounting Policies - Summary of Investments (Details) - USD ($) |
Jun. 30, 2019 |
Dec. 31, 2018 |
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| Accounting Policies [Abstract] | ||
| Short-term investments: Available- for-sale investments | $ 3,032,386 | $ 2,878,664 |
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- References No definition available.
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| X | ||||||||||
- Definition Amount of investment in marketable security, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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