BUSINESS SEGMENT - Schedule of Revenue by Category (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Segment Reporting Information [Line Items] | ||||
| Revenues | $ 15,820 | $ 12,375 | $ 42,991 | $ 33,939 |
| Scoliosis | ||||
| Segment Reporting Information [Line Items] | ||||
| Revenues | 5,027 | 3,299 | 12,609 | 8,652 |
| Sports medicine/other | ||||
| Segment Reporting Information [Line Items] | ||||
| Revenues | 231 | 346 | 837 | 948 |
| Trauma and deformity | ||||
| Segment Reporting Information [Line Items] | ||||
| Revenues | $ 10,562 | $ 8,730 | $ 29,545 | $ 24,339 |