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Impairment of long lived assets (Notes)
3 Months Ended
Apr. 30, 2016
Property, Plant and Equipment [Line Items]  
Impairment of long-lived assets
Impairment of long-lived assets and assets held for sale. 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. There was no impairment of long-lived assets as of April 30, 2016 and January 31, 2016.

The Company's former headquarters in Niles, Illinois is presented as held for sale at fair market value as of April 30, 2016. There are no indications of impairment related to these assets.

Goodwill. Goodwill represents the excess of purchase price over the fair value of the net assets acquired in conjunction with the Company’s acquisition of BPPC.