Quarterly report pursuant to Section 13 or 15(d)

Severance and Restructuring Costs - Additional Information (Detail)

v3.19.1
Severance and Restructuring Costs - Additional Information (Detail)
$ in Millions
 3 Months Ended
Apr. 30, 2019
USD ($)
Restructuring Cost and Reserve [Line Items]  
Restructuring charges for terminated employees $ 0.1
2019 Restructuring Program [Member]  
Restructuring Cost and Reserve [Line Items]  
Severance and restructuring costs 2.0
2019 Restructuring Program [Member] | Minimum [Member]  
Restructuring Cost and Reserve [Line Items]  
Annualized cost savings $ 6.0