INCOME TAX - Loss Before Income Tax Attributable to Domestic and Foreign Operations (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Income Tax Disclosure [Abstract] | ||
| Domestic | $ (14,266) | $ (6,945) |
| Foreign | (8,738) | (11,760) |
| Loss from continuing operations before income tax | $ (23,004) | $ (18,705) |