LEASES - Future lease payments under operating leases (Details) $ in Thousands |
Jun. 30, 2019
USD ($)
|
|---|---|
| LEASES | |
| Remainder of 2019 | $ 647 |
| 2020 | 1,277 |
| 2021 | 1,208 |
| Total future lease payments | 3,132 |
| Less imputed interest | (295) |
| Total lease liability balance | $ 2,837 |