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Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Apr. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Note 12. Employee Benefit Plans We sponsor a 401(k) savings plan under which eligible U.S. employees may choose to make voluntary contributions of such employees' compensation on a pretax basis, subject to certain Internal Revenue Service ("IRS") limits. We make matching contributions equal to 50 percent of the employee's qualifying contribution up to six percent of such employee's compensation plus other discretionary contributions as authorized by our Board of Directors. Employees are eligible to participate upon completion of one year of service if they have attained the age of 21 and have worked more than 1000 hours during such plan year. We contributed $2,323, $2,115 and $1,859 to the plan for fiscal years 2016, 2015, and 2014, respectively.