Quarterly report pursuant to Section 13 or 15(d)

Commitments, Contingencies and Litigation - Additional Information (Detail)

v3.8.0.1
Commitments, Contingencies and Litigation - Additional Information (Detail)
9 Months Ended
Sep. 30, 2017
Pending Litigation [Member] | The Complaint [Member]  
Loss Contingencies [Line Items]  
Lawsuit Filing Date Nov. 08, 2016