Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Numerator:
Net income from continuing operations	$ 1,842	$ 1,431	$ 3,552	$ 1,434
Denominator:
Denominator for basic earnings per share (weighted-average shares which reflect 356,441 shares in the treasury)	7,266,291	7,254,999	7,265,053	7,254,585
Effect of dilutive securities from restricted stock plan, from dilutive effect of stock options and warrants	13,759	56,167	51,823	61,282
Denominator for diluted earnings per share (adjusted weighted average shares)	7,280,050	7,311,166	7,316,876	7,315,867
Basic earnings per share (in dollars per share)	$ 0.25	$ 0.2	$ 0.49	$ 0.2
Diluted earnings per share (in dollars per share)	$ 0.25	$ 0.2	$ 0.49	$ 0.2