Goodwil, Long-lived Assets, and Other Charges - Gross Carrying Amount and Related Accumulated Amortization of Definite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 64,263	$ 63,235
Accumulated Amortization	(19,678)	(17,018)
Intangible assets, net	44,585	46,217
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	31,575	31,300
Accumulated Amortization	0	0
Existing Technology
Finite-Lived Intangible Assets [Line Items]
Amount	9,263	9,190
Accumulated Amortization	(8,304)	(7,706)
Net	959	1,484
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Amount	16,128	16,067
Accumulated Amortization	(8,248)	(6,868)
Net	7,880	9,199
Patented Technology
Finite-Lived Intangible Assets [Line Items]
Amount	7,297	6,678
Accumulated Amortization	(3,126)	(2,444)
Net	$ 4,171	$ 4,234

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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