Deferred Revenue and Commissions - Deferred Commissions (Details) - USD ($)	3 Months Ended
	May 03, 2020	Apr. 30, 2019
Revenue from Contract with Customer [Abstract]
Useful life of deferred commissions related to subscription services revenue	6 years
Deferred Commissions [Roll Forward]
Beginning balance	$ 139,204,000	$ 114,973,000
Additions	29,762,000	18,236,000
Recognition of deferred commissions	(26,603,000)	(19,952,000)
Ending balance	$ 142,363,000	113,257,000
Commission expected to be recognized over the next 12 months (percent)	28.00%
Impairment of capitalized commissions	$ 0	$ 0