Enzo Biochem, Inc. Annual report pursuant to Section 13 and 15(d)

Goodwill and intangible assets (Detail) - Intangible assets (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012	Jul. 31, 2011
Finite-lived intangible assets, Gross	$ 27,904	$ 34,838
Finite-lived intangible assets, Accumulated Amortization	(16,124)	(14,853)
Finite-lived intangible assets, Net	11,780	19,985
Patents [Member]
Finite-lived intangible assets, Gross	11,027	11,027
Finite-lived intangible assets, Accumulated Amortization	(10,439)	(10,278)
Finite-lived intangible assets, Net	588	749
Customer Relationships [Member]
Finite-lived intangible assets, Gross	12,304	12,789
Finite-lived intangible assets, Accumulated Amortization	(4,356)	(3,472)
Finite-lived intangible assets, Net	7,948	9,317
Website And Acquired Content [Member]
Finite-lived intangible assets, Gross	1,019	1,063
Finite-lived intangible assets, Accumulated Amortization	(874)	(748)
Finite-lived intangible assets, Net	145	315
Licensed Technology And Other [Member]
Finite-lived intangible assets, Gross	485	649
Finite-lived intangible assets, Accumulated Amortization	(300)	(355)
Finite-lived intangible assets, Net	185	294
Trademarks [Member]
Finite-lived intangible assets, Gross	3,069	9,310
Finite-lived intangible assets, Accumulated Amortization	(155)
Finite-lived intangible assets, Net	$ 2,914	$ 9,310