Note 3 - Related Party Transactions (Details) (USD $)	12 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2012
Note 3 - Related Party Transactions (Details) [Line Items]
Deferred Finance Costs, Noncurrent, Net	$ 33,116,000	$ 39,449,000
TPG Capital, L.P. [Member] | Parent Company [Member] | Immucor Inc [Member]
Note 3 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction			10,000,000
TPG Capital, L.P. [Member] | Immucor Inc [Member]
Note 3 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction			18,000,000
Deferred Finance Costs, Noncurrent, Net			8,000,000
TPG Capital, L.P. [Member]
Note 3 - Related Party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction	3,900,000	4,400,000	3,000,000
Due to Related Parties	900,000	600,000
Parent Company [Member]
Note 3 - Related Party Transactions (Details) [Line Items]
Deferred Finance Costs, Noncurrent, Net	$ 33,116,000	$ 39,449,000