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

Annual report pursuant to Section 13 and 15(d)

Summary of significant accounting policies (Details) - Segment's net revenues and revenue percentages

Summary of significant accounting policies (Details) - Segment's net revenues and revenue percentages (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Summary of significant accounting policies (Details) - Segment's net revenues and revenue percentages [Line Items]
Sales Revenue Services Net (in Dollars)	$ 55,889	$ 59,403	$ 52,762
Clinical Labs [Member] \| Medicare
Summary of significant accounting policies (Details) - Segment's net revenues and revenue percentages [Line Items]
Sales Revenue Services Net (in Dollars)	12,497	12,658	11,856
Sales Revenue Services Net Percentage	22.00%	21.00%	22.00%
Clinical Labs [Member] \| Third-Party Payor [Member]
Summary of significant accounting policies (Details) - Segment's net revenues and revenue percentages [Line Items]
Sales Revenue Services Net (in Dollars)	26,014	29,616	24,335
Sales Revenue Services Net Percentage	47.00%	50.00%	46.00%
Clinical Labs [Member] \| Self-Pay [Member]
Summary of significant accounting policies (Details) - Segment's net revenues and revenue percentages [Line Items]
Sales Revenue Services Net (in Dollars)	12,172	11,895	11,554
Sales Revenue Services Net Percentage	22.00%	20.00%	22.00%
Clinical Labs [Member] \| Health Maintenance Organizations
Summary of significant accounting policies (Details) - Segment's net revenues and revenue percentages [Line Items]
Sales Revenue Services Net (in Dollars)	5,206	5,234	5,017
Sales Revenue Services Net Percentage	9.00%	9.00%	10.00%
Clinical Labs [Member]
Summary of significant accounting policies (Details) - Segment's net revenues and revenue percentages [Line Items]
Sales Revenue Services Net (in Dollars)	$ 55,889	$ 59,403	$ 52,762
Sales Revenue Services Net Percentage	100.00%	100.00%	100.00%