Earnings per share (Tables)

3 Months Ended

Apr. 30, 2014

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended April 30,
	2014	2013
Basic weighted average common shares outstanding	7,177	6,932
Dilutive effect of equity incentive plans	138	2
Weighted average common shares outstanding assuming full dilution	7,315	6,934
Stock options not included in the computation of diluted earnings per share of common stock because the option exercise prices exceeded the average market prices of the common shares	160	486
Stock options with an exercise price below the average market price	547	469