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Employee Savings Plan	12 Months Ended
Employee Savings Plan	Apr. 30, 2017
Employee Savings Plan
Employee Savings Plan	10. Employee Savings Plan The Company has an employee 401(k) savings plan covering all eligible employees. The Company expensed approximately $3,016,000, $3,028,000 and $2,818,000 in contributions to the plan for the years ended April 30, 2017, 2016 and 2015, respectively.