8. WARRANTS

3 Months Ended

Jul. 31, 2017

Warrants and Rights Note Disclosure [Abstract]

WARRANTS

No warrants were issued or exercised during the three months ended July 31, 2017. As of July 31, 2017, warrants to purchase 39,040 shares of our common stock at an exercise price of $17.29 were outstanding and are exercisable through August 30, 2018.