Goodwill, Long-lived Assets and Other Intangibles Long-lived Assets and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019	Jan. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Long-lived asset impairment loss	$ 0	$ 0	$ 0	$ 0
Finite-Lived Intangible Assets, Accumulated Amortization	(18,983)		(18,983)		$ (17,018)
Intangible Assets, Gross (Excluding Goodwill)	63,066		63,066		63,235
Intangible assets, net	44,083		44,083		46,217
Indefinite-live In-process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	0		0		0
Indefinite-lived Intangible Assets (Excluding Goodwill)	30,945		30,945		31,300
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	8,821		8,821		9,190
Finite-Lived Intangible Assets, Accumulated Amortization	(8,137)		(8,137)		(7,706)
Finite-Lived Intangible Assets, Net	684		684		1,484
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	16,102		16,102		16,067
Finite-Lived Intangible Assets, Accumulated Amortization	(7,901)		(7,901)		(6,868)
Finite-Lived Intangible Assets, Net	8,201		8,201		9,199
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	7,198		7,198		6,678
Finite-Lived Intangible Assets, Accumulated Amortization	(2,945)		(2,945)		(2,444)
Finite-Lived Intangible Assets, Net	$ 4,253		$ 4,253		$ 4,234