Quarterly report pursuant to Section 13 or 15(d)

Severance and Other Restructuring Costs - Additional Information (Detail)

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Severance and Other Restructuring Costs - Additional Information (Detail)
$ in Thousands
9 Months Ended 15 Months Ended 18 Months Ended
Oct. 31, 2017
USD ($)
Oct. 31, 2017
USD ($)
Oct. 31, 2017
USD ($)
Restructuring Cost and Reserve [Line Items]      
Restructing charges excluding plan related severance costs $ 3,288    
DCC Labs [Member]      
Restructuring Cost and Reserve [Line Items]      
Total restructuring charges incurred     $ 2,000
Facility and other restructuring costs 100    
Restructuring Plan [Member]      
Restructuring Cost and Reserve [Line Items]      
Total restructuring charges incurred   $ 6,300  
Estimated restructuring costs 7,500 $ 7,500 $ 7,500
Severance costs $ 3,200