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Significant Accounting Policies - Recently Issued Accounting Standards (Details) - USD ($) | Jan. 01, 2019 | Jun. 30, 2019
--- | --- | ---
New accounting pronouncement, modified retrospective method |  |
Operating Lease, Right-of-Use Asset | $ 3,600,000 | $ 3,323,294
Operating Lease, Liability | $ 4,300,000 | $ 3,904,324
ASU 2016-02 |  |
New accounting pronouncement, modified retrospective method |  |
Accounting principle adopted | true |
Transition option upon adoption | Modified Retrospective |
Prior periods not restated | true |
Operating Lease, Right-of-Use Asset | $ 3,600,000 |
Operating Lease, Liability | $ 4,300,000 |
ASU 2018-07 |  |
New accounting pronouncement, modified retrospective method |  |
Accounting principle adopted | true |

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