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LONG-TERM DEBT - (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Nov. 30, 2016 | Aug. 31, 2015 | Jul. 31, 2015 | Dec. 31, 2018 | Dec. 31, 2017
Long-term debt |  |  |  |  |  |
Long term debt total |  |  |  |  | $ 3,046,008 | $ 3,492,358
Less: current portion |  |  |  |  | (406,361) | (410,949)
Long term debt, excluding current maturities |  |  |  |  | 2,639,647 | 3,081,409
Loans Payable |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Original principal amount |  |  |  |  | $ 4,209,608 | $ 4,209,608
Prime rate (as a percent) |  |  |  |  | 0.25% | 0.25%
Interest rate (as a percent) |  |  |  |  | 5.75% |
Long term debt total |  |  |  |  | $ 2,878,980 | $ 3,094,301
Note Payable To Deutsche Leasing USA Inc 3.69 Percent Due July 2018 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Renewal term |  |  |  | 36 months |  |
Original principal amount |  |  |  | $ 276,495 |  |
Interest rate (as a percent) |  |  |  |  | 3.69% | 3.69%
Principal and interest repayment |  |  | $ 8,100 |  |  |
Long term debt total |  |  |  |  |  | $ 56,180
Note payable to Deutsche Leasing USA, Inc. due November 2019 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Renewal term |  | 36 months |  |  |  |
Original principal amount |  | $ 525,017 |  |  |  |
Interest rate (as a percent) |  |  |  |  | 4.25% | 4.25%
Principal and interest repayment | $ 15,500 |  |  |  |  |
Long term debt total |  |  |  |  | $ 167,028 | $ 341,877

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