Earnings Per Share (Details Textual) - shares	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Earnings Per Share [Abstract]
Weighted basic average shares outstanding	23,085,000	23,092,000	23,080,000	23,083,000
Increase in number of shares outstanding for diluted earnings per share	133,000	100,000	173,000	154,000
Dilutive common stock equivalents were excluded from the computation of diluted earnings per share	810,000	1,005,000	807,000	837,000