Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Numerator:
Net income (loss)	$ (465)	$ 1,867
Denominator:
Denominator for basic earnings per share (weighted-average shares which reflect 356,441 shares in the treasury)	8,013,840	8,116,199
Effect of dilutive securities from restricted stock plan and from dilutive effect of stock options	0	44,181
Denominator for diluted earnings per share (adjusted weighted average shares)	8,013,840	8,160,380
Basic earnings per share	$ (0.06)	$ 0.23
Diluted earnings per share	$ (0.06)	$ 0.23
Warrants and restricted stock awards excluded from the computation of diluted loss per share because the effect of inclusion would have been anti-dilutive	196,340	0