Income Taxes - Provision for Income Taxes from Continuing Operations (Parenthetical) (Details)	12 Months Ended
Jan. 31, 2015 USD ($)
Income Tax Disclosure [Abstract]
Provision (benefit) recognized on the income (loss) from discontinued operations	$ 0

- Definition

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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