9. BENEFIT PLAN	12 Months Ended
Apr. 30, 2016
Compensation and Retirement Disclosure [Abstract]
BENEFIT PLAN	During fiscal year 1997, we adopted a 401(k) benefit plan (the “Plan”) for all full-time employees who are at least the age of 21 and have three or more months of continuous service. The Plan provides for employee contributions of up to 100% of their compensation on a tax deferred basis up to the maximum amount permitted by the Internal Revenue Code. We are not required to make matching contributions under the Plan and we made no matching contributions to the Plan since its inception through December 2009. Effective January 2010, we voluntarily agreed to match 50% of employee contributions of up to the first 6% of a participant’s annual eligible compensation for all Plan contributions, subject to certain IRS limitations. In addition, we have the ability to make additional discretionary matching contributions as defined in the Plan amendment. Under the Plan, each participating employee is fully vested in his or her contributions to the Plan and our contributions to the Plan will fully vest after six years of service. The expense related to our matching contributions to the Plan was $543,000, $454,000, and $300,000 for the fiscal years ended April 30, 2016, 2015, and 2014, respectively.

9. BENEFIT PLAN

12 Months Ended

Apr. 30, 2016

Compensation and Retirement Disclosure [Abstract]

During fiscal year 1997, we adopted a 401(k) benefit plan (the “Plan”) for all full-time employees who are at least the age of 21 and have three or more months of continuous service. The Plan provides for employee contributions of up to 100% of their compensation on a tax deferred basis up to the maximum amount permitted by the Internal Revenue Code. We are not required to make matching contributions under the Plan and we made no matching contributions to the Plan since its inception through December 2009. Effective January 2010, we voluntarily agreed to match 50% of employee contributions of up to the first 6% of a participant’s annual eligible compensation for all Plan contributions, subject to certain IRS limitations. In addition, we have the ability to make additional discretionary matching contributions as defined in the Plan amendment.

Under the Plan, each participating employee is fully vested in his or her contributions to the Plan and our contributions to the Plan will fully vest after six years of service. The expense related to our matching contributions to the Plan was $543,000, $454,000, and $300,000 for the fiscal years ended April 30, 2016, 2015, and 2014, respectively.