Annual report pursuant to Section 13 and 15(d)

Settlement Agreement (Detail)

v3.10.0.1
Settlement Agreement (Detail)
$ in Thousands
12 Months Ended
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Apr. 19, 2018
USD ($)
installment
Loss Contingencies [Line Items]      
Settlement income $ 14,803 $ 0  
Other current assets 14,137 4,520  
Other assets 10,270 $ 2,483  
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 $ 7,200