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Commitments and Contingencies - Additional Information (Details) ¥ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2017 CNY (¥) | Jun. 30, 2017 USD ($) | Jun. 30, 2017 CNY (¥)
Loss Contingencies [Line Items] |  |  |  |  |  |
Total operating leases expenses | $ 916,612 | $ 285,742 | $ 148,274 |  |  |
JING |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Capital commitment to underlying investment | 3,900,000 |  |  | ¥ 26.3 | $ 3,900,000 | ¥ 26.3
Unfunded capital contribution commitment | 2,000,000 |  |  | ¥ 13.2 |  |
Property and Equipment |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Purchase obligation | $ 4,926,073 |  |  |  |  |

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