STOCK-BASED COMPENSATION STOCK-BASED COMPENSATION - STOCK BONUS PROGRAM - (Details) - Stock Bonus Program - shares |
3 Months Ended | 12 Months Ended |
|---|---|---|
Apr. 30, 2018 |
Jan. 31, 2019 |
|
| Stock-Based Compensation Plans | ||
| Vesting period for executive officers (in years) | 1 year | |
| Trailing period of average price of common stock to determine the number of shares to be issued (in days) | 5 days | |
| Subsequent Event | 2019 Plan | ||
| Stock-Based Compensation Plans | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 125,000 | |
| Discount from market price (as a percent) | 15.00% |