Net Income (Loss) per Common Share (Detail Textuals) - shares shares in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Earnings per share
Common stock excluded from the diluted net income per share calculation	341,700
Common stock issued in connection with exercise or vesting of equity awards	6,000	14,275
Shares release from treasury stock in connection with the exercise or vesting of equity awards	34,515	6,800