|
Goodwill and intangible assets (Detail) (USD $)
|
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Jul. 31, 2012
|
Jul. 31, 2012
|
Jul. 31, 2011
|
Jul. 31, 2010
|
|
| Percentage Of Stock Price Result Of Decline Market Capitalization | 44.00% | |||
| Asset Impairment Charges | $ 24,540,000 | |||
| Asset Impairment Charges Net Of Taxes | 22,400,000 | |||
| Amortization of Intangible Assets | 1,660,000 | 1,507,000 | 1,542,000 | |
|
Enzo Life Sciences [Member]
|
||||
| Asset Impairment Charges | 18,800,000 | |||
| Asset Impairment Charges Net Of Taxes | 18,000,000 | |||
|
Trademarks [Member]
|
||||
| Asset Impairment Charges | 5,700,000 | |||
| Asset Impairment Charges Net Of Taxes | 4,400,000 | |||
| Amortization of Intangible Assets | 600,000 | |||
| Finite-Lived Intangible Assets, Period Increase (Decrease) | $ 5,700,000 | |||
| Finite-Lived Intangible Asset, Useful Life | 5 years | |||
| X | ||||||||||
|
- Definition
The value of asset impairment of intangible asset. No definition available.
|
| X | ||||||||||
|
- Definition
Percentage of stock price result of decline market capitalization. No definition available.
|
| X | ||||||||||
|
- Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of increase (decrease) in carrying value of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. No definition available.
|
| X | ||||||||||
|
- Definition
Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
|