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STOCKHOLDERS' EQUITY - Schedule of Variables used in Black-Scholes Model (Details) | Mar. 31, 2020 | Dec. 31, 2019 | Jan. 20, 2019
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Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Expected life (years) | 4 years 9 months 21 days | 5 years 21 days | 5 years
Discount rate |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Warrants measurement input | 0.37% | 1.69% |
Expected volatility |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Warrants measurement input | 113.17% | 103.07% |
Expected dividend |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Warrants measurement input | 0.00% | 0.00% |

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- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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