Commitments And Contingencies - Additional Information (Detail)	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
T&M
Commitments and Contingencies [Line Items]
Sales revenue percentage	70.80%	68.50%
Reseller Agreement [Member]
Commitments and Contingencies [Line Items]
Purchase Commitment, Number of Renewals	4