CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Stock-based compensation			$ 313,691	$ 246,076
Cost of revenues
Stock-based compensation	$ 13,992	$ 10,459	27,194	21,284
Research and development
Stock-based compensation	66,284	40,451	134,853	81,719
Sales and marketing
Stock-based compensation	50,741	49,007	107,215	99,275
General and administrative
Stock-based compensation	$ 23,856	$ 23,096	$ 44,429	$ 43,798