Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Segment and Geographic Information - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2020 USD ($)	Jul. 31, 2019 USD ($)	Jul. 31, 2020 USD ($) Segment Location	Jul. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments \| Segment			2
Number of geographic locations \| Location			2
Net sales	$ 88,538	$ 157,816	$ 158,204	$ 304,365
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales	$ 29,100	$ 91,000	$ 71,900	$ 168,900
Geographic Concentration Risk \| Europe \| Total net sales
Segment Reporting Information [Line Items]
International Operations Contribution	39.60%	32.00%	38.80%	33.10%
Geographic Concentration Risk \| Middle East \| Total net sales
Segment Reporting Information [Line Items]
International Operations Contribution	11.30%	9.00%	8.00%	9.10%
Geographic Concentration Risk \| Asia \| Total net sales
Segment Reporting Information [Line Items]
International Operations Contribution	7.10%	6.60%	7.70%	7.10%
Geographic Concentration Risk \| Americas (excluding the United States) \| Total net sales
Segment Reporting Information [Line Items]
International Operations Contribution	2.70%	9.70%	5.50%	9.20%