STOCKHOLDERS' EQUITY (Detail Textuals 2) - USD ($) |
9 Months Ended | 12 Months Ended | |
|---|---|---|---|
May 31, 2018 |
May 31, 2017 |
Aug. 31, 2017 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Weighted average remaining contractual term | 8 years 8 months 12 days | 8 years | |
| Number of shares issued | 4,098,500 | ||
| Weighted-average grant-date fair value of options granted | $ 4.42 | $ 0.96 | |
| Weighted-average grant-date fair value of options forfeited | $ 2.60 | ||
| 2016 Stock Incentive Plan | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Number of shares issued | 5,000,000 | ||
| Share-based payment award vesting period | 3 years | ||
| Weighted average remaining contractual term | 10 years | ||
| Number of shares issued | 4,096,000 | 2,940,000 | |
| Number of common stock issued | 796,425 | ||
| Value of shares issued | $ 245,791 | ||
| Unrecognized compensation cost related to non-vested share | $ 14,500,580 | ||
| Weighted-average period, cost expected to be recognized | 8 years 8 months 12 days | ||
| Fair value of shares vested | $ 939,420 | ||