Quarterly report pursuant to Section 13 or 15(d)

Income (Loss) Per Share (Details Textual)

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Income (Loss) Per Share (Details Textual)
3 Months Ended 9 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2012
Oct. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 2,079,150 1,541,052 2,108,141 1,549,552