Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015
Numerator
Net income from continuing operations	$ 1,513	$ 2,120	$ 2,946	$ 7,868
Net loss from discontinued operations	0	0	0	(2,485)
Net income	$ 1,513	$ 2,120	$ 2,946	$ 5,383
Denominator
Denominator for basic earnings per share (weighted-average shares which reflect 356,441 shares in the treasury)	7,258,697	7,234,914	7,255,966	7,148,430
Effect of dilutive securities from restricted stock plan and from dilutive effect of stock options	74,300	65,521	65,621	86,822
Denominator for diluted earnings per share (adjusted weighted average shares)	7,332,997	7,300,435	7,321,587	7,235,252
Basic earnings per share from continuing operations (in dollars per share)	$ 0.21	$ 0.29	$ 0.41	$ 1.1
Basic loss per share from discontinued operations (in dollars per share)	0	0	0	(0.35)
Basic earnings per share (in dollars per share)	0.21	0.29	0.41	0.75
Diluted earnings per share from continuing operations (in dollars per share)	0.21	0.29	0.4	1.09
Diluted loss per share from discontinued operations (in dollars per share)	0	0	0	(0.35)
Diluted earnings per share (in dollars per share)	$ 0.21	$ 0.29	$ 0.4	$ 0.74