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DEBT - Additional Information (Details) |  |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 31, 2015 USD ($) | Jan. 16, 2015 USD ($) Tranche | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Amortization of debt discount recorded as interest expense |  |  |  |  | $ 170,822 | $ 270,944 |  |
Loan and Security Agreement | Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 15,000,000 |  |  |  |  |  | $ 5,000,000
Number of tranches | Tranche |  | 2 |  |  |  |  |  |
Additional loan amount not borrowed |  |  |  |  |  |  | $ 5,000,000 |
Facility fee payment |  | $ 75,000 |  |  |  |  |  |
Final payment of term loan |  | 5.10% |  |  |  |  |  |
Amortization of debt discount recorded as interest expense |  |  | $ 100,000 | $ 100,000 | $ 200,000 | 300,000 |  |
Term loans maturity date |  |  |  |  | Aug. 01, 2018 |  |  |
Advance notice period to the lenders |  |  |  |  | 30 days |  |  |
Term loan prepayment fee terms |  |  |  |  | (i) 3% of the outstanding balance, if the loan is prepaid within 24 months of the funding date, (ii) 2% of the outstanding balance, if the loan is prepaid between 24 and 36 months of the funding date and (iii) 1% of the outstanding balance, if the loan is prepaid thereafter (each, a “Prepayment Fee”). |  |  |
Loan and Security Agreement | Term Loan | Mind-NRG, Sarl |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Percentage of equity interests |  |  | 65.00% |  | 65.00% |  |  |
Loan and Security Agreement | Term Loan | 24 months |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proportion of prepayment fees on outstanding balance |  |  |  |  | 3.00% |  |  |
Loan and Security Agreement | Term Loan | Between 24 and 36 months |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proportion of prepayment fees on outstanding balance |  |  |  |  | 2.00% |  |  |
Loan and Security Agreement | Term Loan | Prepaid Thereafter |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proportion of prepayment fees on outstanding balance |  |  |  |  | 1.00% |  |  |
Loan and Security Agreement | Term Loan | Term A Loans |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Amount drew dawn during period |  | $ 10,000,000 |  |  |  |  |  |
Interest rate (as a percent) |  | 7.05% |  |  |  |  |  |
Minimum capital requirement | $ 30,000,000 |  |  |  |  |  |  |
Sale of equity securities | $ 20,000,000 |  |  |  |  |  |  |
Extended interest period for debt instrument |  |  |  |  | 6 months |  |  |
Reduced repayment period for debt instrument |  |  |  |  | 6 months |  |  |
Number of installments period |  |  |  |  | 24 months |  |  |
Interest expense |  |  | $ 100,000 | $ 300,000 | $ 500,000 | $ 800,000 |  |

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