Goodwill, Long-lived Assets and Other Intangibles Long-lived Assets and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Jan. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Long-lived asset impairment loss	$ 0	$ 0
Finite-Lived Intangible Assets, Accumulated Amortization	(17,631)		$ (17,018)
Intangible Assets, Gross (Excluding Goodwill)	61,457		63,235
Intangible assets, net	43,826		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)	29,521		31,300
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	9,174		9,190
Finite-Lived Intangible Assets, Accumulated Amortization	(7,817)		(7,706)
Finite-Lived Intangible Assets, Net	1,357		1,484
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	16,059		16,067
Finite-Lived Intangible Assets, Accumulated Amortization	(7,205)		(6,868)
Finite-Lived Intangible Assets, Net	8,854		9,199
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	6,703		6,678
Finite-Lived Intangible Assets, Accumulated Amortization	(2,609)		(2,444)
Finite-Lived Intangible Assets, Net	$ 4,094		$ 4,234