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Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Aug. 31, 2015
Aug. 31, 2014
NET LOSS $ (7,217) $ (5,479)
OTHER COMPREHENSIVE INCOME (LOSS), net of tax:    
Foreign currency translation adjustment 22 (4,365)
Changes in fair value of cash flow hedges:    
Portion of cash flow hedges recognized in other comprehensive income 180 249
Less: reclassification adjustment for losses included in net income (120) (132)
Net changes in fair value of cash flow hedges 60 117
OTHER COMPREHENSIVE INCOME (LOSS) 82 (4,248)
COMPREHENSIVE LOSS $ (7,135) $ (9,727)