Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended		9 Months Ended		0 Months Ended
	Mar. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Mar. 30, 2014	Sep. 30, 2014 Maximum [Member]	Sep. 30, 2014 Minimum [Member]	Sep. 03, 2013 Merger Agreement [Member]
Accounting Policies [Line Items]
Exchange ratio							1.1533
Reverse stock split, ratio	0.2
Common stock, shares issued	48,855,255	63,096,816	48,841,417	244,276,923
Common stock, shares outstanding	48,855,255	63,096,816	48,841,417	244,276,923			12,350,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001				$ 0.001
Amortization period					10 years	5 years	5 years
Impairment charges		$ 0	$ 0