COMMITMENTS AND CONTINGENCIES - Additional Information (Detail) - USD ($) $ in Thousands |
1 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Apr. 12, 2018 |
Jun. 30, 2015 |
Dec. 31, 2017 |
Dec. 31, 2014 |
Dec. 31, 2016 |
|
| Commitments and Contingencies Disclosure [Line Items] | |||||
| Accrued Cost Sharing Expenses Clinical Studies | $ 328 | $ 150 | |||
| Purdue Pharma [Member] | |||||
| Commitments and Contingencies Disclosure [Line Items] | |||||
| Litigation Settlement, Expense | $ 250 | $ 500 | |||
| Palatine Illinois | |||||
| Commitments and Contingencies Disclosure [Line Items] | |||||
| Leases administrative office space | $ 2 | ||||
| Scenario, Forecast [Member] | |||||
| Commitments and Contingencies Disclosure [Line Items] | |||||
| Gain Contingency, Unrecorded Amount | $ 10,000 | ||||
| Loss Contingency, Damages Sought, Value | $ 10,000 | ||||