Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended	1 Months Ended
	Jul. 10, 2014 Plaintiff	Apr. 30, 2014 sqft	Sep. 08, 2014 Plaintiff
Commitments and Contingencies Disclosure [Abstract]
Number of purported securities class action lawsuits	2
Number of lead plaintiffs filed			2
Term of lease agreement		6 years
Area of administrative office		18,467
Contractual liability		$ 2.1