Note 3 - Related Party Transactions (Details) (Immucor Inc [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	May 31, 2013
Immucor Inc [Member]
Note 3 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction	$ 3.0
Investment Advisory, Management and Administrative Fees	1.0	1.1
Due to Related Parties	$ 0.8		$ 0.6