RELATED PARTY TRANSACTIONS (Details) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2017
USD ($)
supplier
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| Related Party Transaction [Line Items] | |||
| Number of related party suppliers | supplier | 2 | ||
| Affiliated Entity | FMI | |||
| Related Party Transaction [Line Items] | |||
| Payments to related party | $ 837 | $ 546 | $ 320 |
| Affiliated Entity | Structure Medical | |||
| Related Party Transaction [Line Items] | |||
| Payments to related party | $ 3,244 | $ 1,223 | $ 880 |