Subsequent Events - Additional Information (Detail) (Subsequent Event, USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	9 Months Ended
	Nov. 05, 2013	Sep. 30, 2013 Private Placement
Subsequent Event [Line Items]
Stock issued during period shares other		8,052,416
Stock issued during period shares new issues		805,242
Sale of securities consideration received on transaction	$ 100