COMMITMENTS AND CONTINGENCIES (Operating lease commitments) (Details) |
Dec. 31, 2017
USD ($)
|
|---|---|
| Long-term Purchase Commitment [Line Items] | |
| 2018 | $ 999,622 |
| 2019 | 1,093,799 |
| 2020 | 1,772,834 |
| 2021 | 1,073,805 |
| 2022 | 1,615,079 |
| 2023 and later | 32,016,233 |
| Total lease payments | $ 38,571,372 |