Note 15 - Condensed Consolidating Financial Information Of Guarantor Subsidiary (Detail) - Condensed Consolidating Statements of Operations (USD $)	0 Months Ended	3 Months Ended
	Aug. 31, 2011	Aug. 31, 2012	Aug. 19, 2011
NET SALES	$ 11,390,000	$ 85,154,000	$ 74,910,000
COST OF SALES (exclusive of amortization shown separately below)	7,156,000	27,101,000	22,955,000
GROSS MARGIN	4,234,000	58,053,000	51,955,000
OPERATING EXPENSES:
Research and development	623,000	4,885,000	4,895,000
Selling and marketing	1,112,000	12,221,000	10,510,000
Distribution	649,000	4,508,000	3,952,000
General and administrative	754,000	10,116,000	38,175,000
Amortization of intangibles	1,648,000	12,381,000	931,000
Total operating expenses	4,786,000	44,111,000	58,463,000
INCOME (LOSS) FROM OPERATIONS	(552,000)	13,942,000	(6,508,000)
NON-OPERATING INCOME (EXPENSE):
Interest income		3,000	142,000
Interest expense	3,393,000	24,488,000
Loss on extinguishment of debt		(6,686,000)
Other, net	(11,000)	120,000	2,673,000
Total non-operating income (expense)	(3,404,000)	(31,051,000)	2,815,000
INCOME (LOSS) BEFORE INCOME TAXES	(3,956,000)	(17,109,000)	(3,693,000)
PROVISION (BENEFIT) FOR INCOME TAXES	(1,514,000)	(6,474,000)	2,681,000
NET INCOME (LOSS) BEFORE EARNINGS OF CONSOLIDATED SUBSIDIARIES	(2,442,000)	(10,635,000)	(6,374,000)
NET INCOME (LOSS)	(2,442,000)	(10,635,000)	(6,374,000)
Immucor Inc [Member] | Successor [Member]
NET SALES		64,505,000
COST OF SALES (exclusive of amortization shown separately below)		20,027,000
GROSS MARGIN		44,478,000
OPERATING EXPENSES:
Research and development		3,208,000
Selling and marketing		6,958,000
Distribution		2,875,000
General and administrative		7,550,000
Amortization of intangibles		11,771,000
Total operating expenses		32,362,000
INCOME (LOSS) FROM OPERATIONS	(313,000)	12,116,000
NON-OPERATING INCOME (EXPENSE):
Interest expense		(24,488,000)
Loss on extinguishment of debt		(6,686,000)
Other, net		(23,000)
Total non-operating income (expense)		(31,197,000)
INCOME (LOSS) BEFORE INCOME TAXES		(19,081,000)
PROVISION (BENEFIT) FOR INCOME TAXES		(7,085,000)
NET INCOME (LOSS) BEFORE EARNINGS OF CONSOLIDATED SUBSIDIARIES		(11,996,000)
Net Income (Loss) of consolidated subsidiaries		1,361,000
NET INCOME (LOSS)		(10,635,000)
Immucor Inc [Member] | Predecessor [Member]
NET SALES	7,720,000		55,063,000
COST OF SALES (exclusive of amortization shown separately below)	4,835,000		17,070,000
GROSS MARGIN	2,885,000		37,993,000
OPERATING EXPENSES:
Research and development	287,000		2,390,000
Selling and marketing	577,000		5,321,000
Distribution	399,000		2,331,000
General and administrative	455,000		33,903,000
Amortization of intangibles	1,480,000		117,000
Total operating expenses	3,198,000		44,062,000
INCOME (LOSS) FROM OPERATIONS			(6,069,000)
NON-OPERATING INCOME (EXPENSE):
Interest income			46,000
Interest expense	(3,401,000)
Other, net			(246,000)
Total non-operating income (expense)	(3,401,000)		(200,000)
INCOME (LOSS) BEFORE INCOME TAXES	(3,714,000)		(6,269,000)
PROVISION (BENEFIT) FOR INCOME TAXES	(1,313,000)		1,497,000
NET INCOME (LOSS) BEFORE EARNINGS OF CONSOLIDATED SUBSIDIARIES	(2,401,000)		(7,766,000)
Net Income (Loss) of consolidated subsidiaries	(41,000)		1,392,000
NET INCOME (LOSS)	(2,442,000)		(6,374,000)
Guarantor [Member] | Successor [Member]
NET SALES		1,441,000
COST OF SALES (exclusive of amortization shown separately below)		917,000
GROSS MARGIN		524,000
OPERATING EXPENSES:
Research and development		1,643,000
Selling and marketing		460,000
Distribution		43,000
General and administrative		474,000
Amortization of intangibles		54,000
Total operating expenses		2,674,000
INCOME (LOSS) FROM OPERATIONS	(505,000)	(2,150,000)
NON-OPERATING INCOME (EXPENSE):
INCOME (LOSS) BEFORE INCOME TAXES		(2,150,000)
PROVISION (BENEFIT) FOR INCOME TAXES		(712,000)
NET INCOME (LOSS) BEFORE EARNINGS OF CONSOLIDATED SUBSIDIARIES		(1,438,000)
NET INCOME (LOSS)		(1,438,000)
Guarantor [Member] | Predecessor [Member]
NET SALES	185,000		980,000
COST OF SALES (exclusive of amortization shown separately below)	226,000		722,000
GROSS MARGIN	(41,000)		258,000
OPERATING EXPENSES:
Research and development	331,000		2,471,000
Selling and marketing	67,000		568,000
Distribution	3,000		34,000
General and administrative	57,000		657,000
Amortization of intangibles	6,000		757,000
Total operating expenses	464,000		4,487,000
INCOME (LOSS) FROM OPERATIONS			(4,229,000)
NON-OPERATING INCOME (EXPENSE):
Other, net			14,000
Total non-operating income (expense)			14,000
INCOME (LOSS) BEFORE INCOME TAXES	(505,000)		(4,215,000)
PROVISION (BENEFIT) FOR INCOME TAXES	(177,000)		(1,598,000)
NET INCOME (LOSS) BEFORE EARNINGS OF CONSOLIDATED SUBSIDIARIES	(328,000)		(2,617,000)
NET INCOME (LOSS)	(328,000)		(2,617,000)
Non-Guarantors [Member] | Successor [Member]
NET SALES		29,605,000
COST OF SALES (exclusive of amortization shown separately below)		16,554,000
GROSS MARGIN		13,051,000
OPERATING EXPENSES:
Research and development		34,000
Selling and marketing		4,803,000
Distribution		1,590,000
General and administrative		2,092,000
Amortization of intangibles		556,000
Total operating expenses		9,075,000
INCOME (LOSS) FROM OPERATIONS	266,000	3,976,000
NON-OPERATING INCOME (EXPENSE):
Interest income		11,000
Interest expense		(8,000)
Other, net		143,000
Total non-operating income (expense)		146,000
INCOME (LOSS) BEFORE INCOME TAXES		4,122,000
PROVISION (BENEFIT) FOR INCOME TAXES		1,323,000
NET INCOME (LOSS) BEFORE EARNINGS OF CONSOLIDATED SUBSIDIARIES		2,799,000
NET INCOME (LOSS)		2,799,000
Non-Guarantors [Member] | Predecessor [Member]
NET SALES	4,370,000		26,648,000
COST OF SALES (exclusive of amortization shown separately below)	2,980,000		12,944,000
GROSS MARGIN	1,390,000		13,704,000
OPERATING EXPENSES:
Research and development	5,000		34,000
Selling and marketing	468,000		4,621,000
Distribution	247,000		1,587,000
General and administrative	242,000		3,615,000
Amortization of intangibles	162,000		57,000
Total operating expenses	1,124,000		9,914,000
INCOME (LOSS) FROM OPERATIONS			3,790,000
NON-OPERATING INCOME (EXPENSE):
Interest income	11,000		117,000
Interest expense	(3,000)		(21,000)
Other, net	(11,000)		2,905,000
Total non-operating income (expense)	(3,000)		3,001,000
INCOME (LOSS) BEFORE INCOME TAXES	263,000		6,791,000
PROVISION (BENEFIT) FOR INCOME TAXES	(24,000)		2,782,000
NET INCOME (LOSS) BEFORE EARNINGS OF CONSOLIDATED SUBSIDIARIES	287,000		4,009,000
NET INCOME (LOSS)	287,000		4,009,000
Intersegment Elimination [Member] | Successor [Member]
NET SALES		(10,397,000)
COST OF SALES (exclusive of amortization shown separately below)		(10,397,000)
NON-OPERATING INCOME (EXPENSE):
Interest income		(8,000)
Interest expense		8,000
Net Income (Loss) of consolidated subsidiaries		(1,361,000)
NET INCOME (LOSS)		(1,361,000)
Intersegment Elimination [Member] | Predecessor [Member]
NET SALES	(885,000)		(7,781,000)
COST OF SALES (exclusive of amortization shown separately below)	(885,000)		(7,781,000)
NON-OPERATING INCOME (EXPENSE):
Interest income	(11,000)		(21,000)
Interest expense	11,000		21,000
Net Income (Loss) of consolidated subsidiaries	41,000		(1,392,000)
NET INCOME (LOSS)	41,000		(1,392,000)
Total [Member] | Successor [Member]
NET SALES		85,154,000
COST OF SALES (exclusive of amortization shown separately below)		27,101,000
GROSS MARGIN		58,053,000
OPERATING EXPENSES:
Research and development		4,885,000
Selling and marketing		12,221,000
Distribution		4,508,000
General and administrative		10,116,000
Amortization of intangibles		12,381,000
Total operating expenses		44,111,000
INCOME (LOSS) FROM OPERATIONS	(552,000)	13,942,000
NON-OPERATING INCOME (EXPENSE):
Interest income		3,000
Interest expense		(24,488,000)
Loss on extinguishment of debt		(6,686,000)
Other, net		120,000
Total non-operating income (expense)		(31,051,000)
INCOME (LOSS) BEFORE INCOME TAXES		(17,109,000)
PROVISION (BENEFIT) FOR INCOME TAXES		(6,474,000)
NET INCOME (LOSS) BEFORE EARNINGS OF CONSOLIDATED SUBSIDIARIES		(10,635,000)
NET INCOME (LOSS)		(10,635,000)
Total [Member] | Predecessor [Member]
NET SALES	11,390,000		74,910,000
COST OF SALES (exclusive of amortization shown separately below)	7,156,000		22,955,000
GROSS MARGIN	4,234,000		51,955,000
OPERATING EXPENSES:
Research and development	623,000		4,895,000
Selling and marketing	1,112,000		10,510,000
Distribution	649,000		3,952,000
General and administrative	754,000		38,175,000
Amortization of intangibles	1,648,000		931,000
Total operating expenses	4,786,000		58,463,000
INCOME (LOSS) FROM OPERATIONS			(6,508,000)
NON-OPERATING INCOME (EXPENSE):
Interest income			142,000
Interest expense	(3,393,000)
Other, net	(11,000)		2,673,000
Total non-operating income (expense)	(3,404,000)		2,815,000
INCOME (LOSS) BEFORE INCOME TAXES	(3,956,000)		(3,693,000)
PROVISION (BENEFIT) FOR INCOME TAXES	(1,514,000)		2,681,000
NET INCOME (LOSS) BEFORE EARNINGS OF CONSOLIDATED SUBSIDIARIES	(2,442,000)		(6,374,000)
NET INCOME (LOSS)	$ (2,442,000)		$ (6,374,000)