Goodwill, Long-lived Assets and Other Intangibles Long-lived Assets and Other Intangibles (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jan. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Long-lived asset impairment loss	$ 0	$ 0
Finite-Lived Intangible Assets, Accumulated Amortization	(18,377)		$ (17,018)
Intangible Assets, Gross (Excluding Goodwill)	62,552		63,235
Intangible assets, net	44,175		46,217
Indefinite-live In-process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	0		0
Indefinite-lived Intangible Assets (Excluding Goodwill)	30,380		31,300
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	9,237		9,190
Finite-Lived Intangible Assets, Accumulated Amortization	(8,028)		(7,706)
Finite-Lived Intangible Assets, Net	1,209		1,484
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	16,111		16,067
Finite-Lived Intangible Assets, Accumulated Amortization	(7,568)		(6,868)
Finite-Lived Intangible Assets, Net	8,543		9,199
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	6,824		6,678
Finite-Lived Intangible Assets, Accumulated Amortization	(2,781)		(2,444)
Finite-Lived Intangible Assets, Net	$ 4,043		$ 4,234