FAIR VALUE MEASUREMENTS - Narrative (Details) $ in Millions |
6 Months Ended |
---|---|
Jun. 30, 2017
USD ($)
| |
Level 3 | Obligations | |
Financial instruments | |
Volatility of future revenue (as a percent) | 50.00% |
Level 3 | Obligations | Minimum | |
Financial instruments | |
Discount rate | 1.00% |
Probability of milestone achievement (as a percent) | 43.00% |
Level 3 | Obligations | Maximum | |
Financial instruments | |
Discount rate | 3.00% |
Probability of milestone achievement (as a percent) | 85.00% |
Fair value | Level 2 | |
Financial instruments | |
Fair value of notes payable | $ 607.2 |
Carrying value | Level 2 | |
Financial instruments | |
Fair value of notes payable | $ 598.4 |