Quarterly report pursuant to Section 13 or 15(d)

Severance and Other Restructuring Costs - Activity in Accrued Restructuring Liability (Detail)

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Severance and Other Restructuring Costs - Activity in Accrued Restructuring Liability (Detail)
$ in Thousands
9 Months Ended
Oct. 31, 2018
USD ($)
Restructuring Cost and Reserve [Line Items]  
Accrual balance at the beginning of the period $ 225
Restructuring charges incurred 914
Cash payments (415)
Other charges 0
Accrual balance at the ending of the period 724
Employee-Related Benefits [Member]  
Restructuring Cost and Reserve [Line Items]  
Accrual balance at the beginning of the period 61
Restructuring charges incurred 950
Cash payments (287)
Other charges 0
Accrual balance at the ending of the period 724
Closure of Leased Facilities [Member]  
Restructuring Cost and Reserve [Line Items]  
Accrual balance at the beginning of the period 135
Restructuring charges incurred (7)
Cash payments (128)
Other charges 0
Other Restructuring [Member]  
Restructuring Cost and Reserve [Line Items]  
Accrual balance at the beginning of the period 29
Restructuring charges incurred (29)
Other charges $ 0