CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Stock-based compensation			$ 452,481	$ 378,928
Cost of revenues
Stock-based compensation	$ 13,715	$ 10,426	40,903	31,710
Research and development
Stock-based compensation	63,180	45,003	198,033	126,722
Sales and marketing
Stock-based compensation	43,711	50,743	150,932	150,018
General and administrative
Stock-based compensation	$ 18,184	$ 26,680	$ 62,613	$ 70,478