Quarterly report pursuant to Section 13 or 15(d)

Settlement Agreement (Detail)

v3.10.0.1
Settlement Agreement (Detail)
$ in Thousands
1 Months Ended 12 Months Ended
Jan. 31, 2019
USD ($)
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Apr. 19, 2018
USD ($)
installment
Loss Contingencies [Line Items]        
Other current assets   $ 14,137 $ 16,414  
Other assets   10,270 9,972  
Settlement Agreement        
Loss Contingencies [Line Items]        
Aggregate net payments to be received       $ 15,700
Number of equal installments payable | installment       4
Settlement income   $ 14,800    
Other current assets     7,900  
Other assets     $ 7,400  
Subsequent Event | Settlement Agreement        
Loss Contingencies [Line Items]        
Installment payments received $ 3,900