Commitments and Contingencies - Operating Leases - Additional Information (Detail) - Operating Lease One [Member] - Multi Tenant Building [Member] - ft²	1 Months Ended	9 Months Ended
May 31, 2016	Sep. 30, 2016
Commitments And Contingencies [Line Items]
Office space rent under operating lease	19,805	22,067
Lease expire date	Feb. 28, 2022
Commencement date of lease	Sep. 01, 2016

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

No definition available.

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration