Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Numerator:
Net income	$ 1,146	$ 501	$ 2,076	$ 3,386
Denominator:
Denominator for basic earnings per share (weighted-average shares which reflect shares in the treasury, 471,289 and 356,441 for October 31, 2019 and 2018, respectively)	8,004,640	8,119,448	8,013,383	8,117,307
Effect of dilutive securities from restricted stock plan and from dilutive effect of stock options	31,289	66,682	30,776	57,253
Denominator for diluted earnings per share (adjusted weighted average shares)	8,035,929	8,186,130	8,044,159	8,174,560
Basic earnings per share	$ 0.14	$ 0.06	$ 0.26	$ 0.42
Diluted earnings per share	$ 0.14	$ 0.06	$ 0.26	$ 0.41
Warrants and restricted stock awards excluded from the computation of diluted loss per share because the effect of inclusion would have been anti-dilutive