Stockholders' Equity (Detail Textuals) - shares	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Equity [Abstract]
Common stock, shares issued	117,774	144,390	137,050	179,302
Treasury stock, shares utilized of equity awards	58,790	228,378	106,043	261,208