Goodwill and Intangible Assets, Net - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	6 years 6 months
Estimated Fair Value	$ 114,610	$ 114,610
Accumulated Amortization	(58,744)	(41,027)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	55,866	73,583
Cumulative translation adjustment	634	620
Acquisition-related Intangibles, Net	$ 56,500	74,203
Existing technology
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	1 year 8 months 12 days
Estimated Fair Value	$ 31,594	31,594
Accumulated Amortization	(25,164)	(20,747)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 6,430	10,847
Tradenames / trademarks
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	3 months 18 days
Estimated Fair Value	$ 2,419	2,419
Accumulated Amortization	(2,369)	(1,858)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 50	561
Customer contracts & related relationships
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	7 years 6 months
Estimated Fair Value	$ 65,782	65,782
Accumulated Amortization	(19,071)	(11,168)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 46,711	54,614
Certifications
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	7 months 6 days
Estimated Fair Value	$ 6,917	6,917
Accumulated Amortization	(6,229)	(4,846)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 688	2,071
Maintenance contracts & related relationships
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	4 months 24 days
Estimated Fair Value	$ 1,498	1,498
Accumulated Amortization	(1,403)	(1,104)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 95	394
Backlog—Subscription
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	8 months 12 days
Estimated Fair Value	$ 6,400	6,400
Accumulated Amortization	(4,508)	(1,304)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 1,892	$ 5,096