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Income Taxes (Details Textual) (USD $)
|
3 Months Ended | ||
|---|---|---|---|
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Apr. 30, 2013
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Apr. 30, 2012
|
Jan. 31, 2013
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| Income Taxes (Textual) [Abstract] | |||
| Federal corporate income tax rate | 35.00% | 34.00% | |
| Accrued income taxes included in accrued expenses | $ 3,310,000 | $ 1,362,000 | |
| Net deferred tax assets | $ 1,499,000 | $ 1,639,000 | |
| Federal state and local income tax examination applicability description | no longer subject to federal ,state and local income tax examinations by tax authorities for its fiscal years ended on or before January 31, 2009 | ||