SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Fair Value Hierarchy of Financial Liabilities Measured at Fair Value (Details) - Fair Value, Measurements, Recurring - USD ($)
|
Jun. 30, 2020 |
Dec. 31, 2019 |
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
|
|
| Derivative liability |
$ 247,000
|
$ 408,000
|
| Warrant liabilities |
0
|
2,637,500
|
| Total liabilities at fair value |
247,000
|
3,045,500
|
| Quoted Prices in Active Markets for Identical Assets (Level 1) |
|
|
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
|
|
| Derivative liability |
0
|
0
|
| Warrant liabilities |
0
|
0
|
| Total liabilities at fair value |
0
|
0
|
| Significant Other Observable Inputs (Level 2) |
|
|
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
|
|
| Derivative liability |
0
|
0
|
| Warrant liabilities |
0
|
0
|
| Total liabilities at fair value |
0
|
0
|
| Significant Unobservable Inputs (Level 3) |
|
|
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
|
|
| Derivative liability |
247,000
|
408,000
|
| Warrant liabilities |
0
|
2,637,500
|
| Total liabilities at fair value |
$ 247,000
|
$ 3,045,500
|