STOCK-BASED COMPENSATION (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Line Items] | ||||
| Total stock-based compensation | $ 175,579 | $ 231,086 | $ 349,017 | $ 396,760 |
| Employee and director stock option grants [Member] | Research and development [Member] | ||||
| Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Line Items] | ||||
| Total stock-based compensation | 36,625 | 40,072 | 70,752 | 56,720 |
| Employee and director stock option grants [Member] | General and administrative [Member] | ||||
| Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Line Items] | ||||
| Total stock-based compensation | $ 138,954 | $ 191,014 | $ 278,265 | $ 340,040 |