Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Numerator
Net income from continuing operations	$ 1,431	$ 3,588	$ 1,434	$ 5,748
Net loss from discontinued operations	0	(1,554)	0	(2,485)
Net income	$ 1,431	$ 2,034	$ 1,434	$ 3,263
Denominator
Denominator for basic earnings per share (weighted-average shares which reflect 356,441 shares in the treasury as a result of the stock repurchase program that ended in 2011)	7,254,999	7,145,418	7,254,585	7,104,471
Effect of dilutive securities from restricted stock plan and from dilutive effect of stock options	56,167	21,705	61,282	86,998
Denominator for diluted earnings per share (adjusted weighted average shares)	7,311,166	7,167,123	7,315,867	7,191,469
Basic earnings per share from continuing operations (in dollars per share)	$ 0.2	$ 0.5	$ 0.2	$ 0.81
Basic loss per share from discontinued operations (in dollars per share)	0	(0.22)	0	(0.35)
Basic earnings per share (in dollars per share)	0.2	0.28	0.2	0.46
Diluted earnings per share from continuing operations (in dollars per share)	0.2	0.5	0.2	0.80
Diluted loss per share from discontinued operations (in dollars per share)	0	(0.22)	0	(0.35)
Diluted earnings per share (in dollars per share)	$ 0.2	$ 0.28	$ 0.2	$ 0.45