COMMITMENTS AND CONTINGENCIES - Minimum Annual Lease Commitments (Details) $ in Thousands |
1 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Mar. 31, 2015
ft²
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|
| Lease | ||||
| Rent-free term | 2 months | |||
| Aggregate minimum annual lease commitments under non cancellable operating lease | ||||
| 2017 | $ 226 | |||
| 2018 | 234 | |||
| 2019 | 241 | |||
| 2020 | 164 | |||
| Total minimum lease payments | 865 | |||
| Rent expense under operating lease agreement | ||||
| Rent expense | 182 | $ 112 | $ 69 | |
| Guarantees | ||||
| Restricted cash | 97 | $ 97 | ||
| Amendment to office and research facility operating lease | ||||
| Lease | ||||
| Square of feet of space | ft² | 9,660 | |||
| Office and research facility operating lease | ||||
| Lease | ||||
| Square of feet of space | ft² | 19,335 | |||
| Term of lease extension option | 5 years | |||
| Stand-by letter of credit | ||||
| Guarantees | ||||
| Restricted cash | $ 97 | |||