Income Taxes (Details Textual) (USD $)	3 Months Ended
Apr. 30, 2013	Apr. 30, 2012	Jan. 31, 2013
Income Taxes (Textual) [Abstract]
Income tax (benefit) provision	$ (6,612,000)	$ (914,000)
Federal statutory rate	35.00%
Unrecognized tax benefits	3,500,000		3,500,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued			800,000
Expected decrease in unrecognized tax benefits over next twelve months	$ 500,000

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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- Definition

This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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