CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Stock-based compensation	$ 158,818	$ 123,063
Cost of revenues
Stock-based compensation	13,202	10,825
Research and development
Stock-based compensation	68,569	41,268
Sales and marketing
Stock-based compensation	56,474	50,268
General and administrative
Stock-based compensation	$ 20,573	$ 20,702