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Defined Contribution Benefit Plan
 12 Months Ended
May. 31, 2015
Defined Contribution Benefit Plan
8. Defined Contribution Benefit Plan

The Company maintains a defined contribution 401(k) benefit plan covering substantially all employees. Employees are permitted to defer compensation up to IRS limits, with the Company matching 100% of the first 3% of deferred compensation and 50% of the next 2% deferred. The Company’s expense under this plan was $1,051,000, $954,000 and $863,000 in fiscal years 2015, 2014 and 2013, respectively.