XML 72 R59.htm IDEA: XBRL DOCUMENT v3.8.0.1
Commitments and Contingencies - Additional Information (Detail)
$ in Millions
1 Months Ended
Apr. 30, 2018
USD ($)
Subsequent Event [Member]  
Commitments And Contingencies [Line Items]  
Loss Contingency, Damages Sought, Value $ 5