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Impairment of long lived assets (Notes)
3 Months Ended
Apr. 30, 2015
Property, Plant and Equipment [Line Items]  
Impairment of long-lived assets
Impairment of long-lived assets. The Company evaluates long-lived assets (including intangible assets) for impairment whenever events or changes in circumstances indicate that the carrying amount of a long-lived asset may not be recoverable. An asset is considered impaired if its carrying amount exceeds the undiscounted future net cash flow the asset is expected to generate.

The Company has an idle facility in Cicero, Illinois is presented as held for sale as of April 30, 2015. In 2014, management performed the required impairment analysis on the idle facility to determine if its carrying value was recoverable. Management determined that the carrying value of the idle facility was fully recoverable.