Net Income (Loss) per Common Share (Detail Textuals) - shares	6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Earnings Per Share [Abstract]
Common stock excluded from the diluted net income per share calculation	1,246,000
Common stock issued in connection with exercise or vesting of equity awards	34,912	195,156
Shares release from treasury stock in connection with the exercise or vesting of equity awards	32,830	16,914