8. EQUITY COMPENSATION PLANS (Details Narrative) $ in Thousands |
3 Months Ended |
|---|---|
|
Jul. 31, 2018
USD ($)
shares
| |
| Stock Incentive Plans [Member] | |
| Shares available for grant | 5,005,142 |
| Options and restricted stock rights [Member] | |
| Shares available for grant | 3,088,084 |
| Future grants of share-based awards [Member] | |
| Shares available for grant | 1,917,058 |
| ESPP [Member] | |
| Shares authorized under plan | 2,142,857 |
| Shares available for grant | 1,271,409 |
| Common stock purchased under plan | 0 |
| Non-Vested Employee Stock Options [Member] | |
| Unrecognized compensation cost | $ | $ 2,370 |
| Unrecognized cost amortization period | 2 years 9 months 22 days |
| Non-Vested Restricted Stock Rights [Member] | |
| Unrecognized compensation cost | $ | $ 449 |
| Unrecognized cost amortization period | 3 years 10 months 14 days |
| Restricted Stock Rights [Member] | |
| RSR's granted | 128,050 |
| Aggregate grant date fair value | $ | $ 464 |