Reverse Recapitalization of the W Group, Private Placement, Reverse Split and Migratory Merger - Additional Information (Detail) (USD $)	1 Months Ended
	Apr. 29, 2011	Dec. 31, 2013	Dec. 31, 2012	Aug. 26, 2011
Business Acquisition [Line Items]
Common stock shares, outstanding	10,000,000	10,521,887	9,078,287
Series A Convertible Preferred Stock, shares issued		0	0
Assets prior to reverse acquisition transaction, net book value	$ 5,000
Aggregate sale of shares	18,000
Amount of common stock that Preferred stock issued could be converted to	48,000,007
Proceeds before transaction fees	18,000,000
Costs and expenses	5,100,000
Shares issuable upon exercise	3,360,000
Reverse stock split ratio				32
Conversion of preferred stock into common stock, value				$ 1,000
Reverse acquisition transaction [Member]
Business Acquisition [Line Items]
Series A Convertible Preferred Stock, shares issued	95,960.90289
Number of stockholders	3
Pre-split shares of Common Stock issuable upon exercise of the private placement warrant	24,000,007