Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
NET LOSS ATTRIBUTABLE TO IMMUCOR, INC.	$ (8,423)	$ (39,440)	$ (27,436)	$ (53,997)
OTHER COMPREHENSIVE INCOME (LOSS), net of tax:
Foreign currency translation adjustment	1,795	(13,915)	(3,680)	(27,677)
Changes in fair value of cash flow hedges:
Portion of cash flow hedges recognized in other comprehensive income	108	186	417	553
Less: reclassification adjustment for (losses) gains included in net income	3	(72)	(168)	(242)
Net changes in fair value of cash flow hedges	111	114	249	311
OTHER COMPREHENSIVE INCOME (LOSS)	1,906	(13,801)	(3,431)	(27,366)
COMPREHENSIVE LOSS	(6,517)	$ (53,241)	(30,867)	$ (81,363)
Comprehensive loss attributable to the noncontrolling interest	(237)		(237)
COMPREHENSIVE LOSS ATTIBUTABLE TO SHAREHOLDERS OF IMMUCOR, INC.	(6,280)	$ (53,241)	(30,630)	$ (81,363)
NET LOSS ATTRIBUTABLE TO IMMUCOR, INC.	(8,423)	(39,440)	(27,436)	(53,997)
Less: reclassification adjustment for losses included in net income	$ 3	$ (72)	$ (168)	$ (242)