INCOME TAX - Narrative (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Operating Loss Carryforwards [Line Items] | ||
| Unrecognized tax benefits | $ 0 | $ 0 |
| U.S. Federal | ||
| Operating Loss Carryforwards [Line Items] | ||
| Operating loss carryforwards | 160,600,000 | |
| U.S. State | ||
| Operating Loss Carryforwards [Line Items] | ||
| Operating loss carryforwards | 31,900,000 | |
| Hong Kong | ||
| Operating Loss Carryforwards [Line Items] | ||
| Operating loss carryforwards | $ 1,700,000 | |
| Federal income tax rate | 16.50% | |
| China | ||
| Operating Loss Carryforwards [Line Items] | ||
| Operating loss carryforwards | $ 6,800,000 | |
| Federal income tax rate | 25.00% | |
| Carryover period | 5 years |