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Segment and Geographic Information - Additional Information (Details)
$ in Thousands
3 Months Ended
Apr. 30, 2020
USD ($)
Segment
Location
Apr. 30, 2019
USD ($)
Segment Reporting Information [Line Items]    
Number of operating segments | Segment 2  
Number of geographic locations | Location 2  
Net sales $ 69,666 $ 146,549
Intersegment Eliminations    
Segment Reporting Information [Line Items]    
Net sales $ 42,800 $ 77,900
Geographic Concentration Risk | Europe | Total net sales    
Segment Reporting Information [Line Items]    
International Operations Contribution 37.80% 34.20%
Geographic Concentration Risk | Americas (excluding the United States) | Total net sales    
Segment Reporting Information [Line Items]    
International Operations Contribution 9.10% 8.70%
Geographic Concentration Risk | Asia | Total net sales    
Segment Reporting Information [Line Items]    
International Operations Contribution 8.30% 7.70%
Geographic Concentration Risk | Middle East | Total net sales    
Segment Reporting Information [Line Items]    
International Operations Contribution 3.80% 9.10%