Property and Equipment - Additional Information (Detail) |
12 Months Ended |
---|---|
Dec. 31, 2015 | |
Minimum [Member] | |
Property, Plant and Equipment [Line Items] | |
Estimated useful lives of the assets | 2 years |
Maximum [Member] | |
Property, Plant and Equipment [Line Items] | |
Estimated useful lives of the assets | 7 years |