Quarterly report pursuant to sections 13 or 15(d)

Recent Events - Additional Information (Detail)

v2.4.0.8
Recent Events - Additional Information (Detail)
Sep. 30, 2013
May 17, 2013
Mar. 31, 2013
Dec. 31, 2012
Regulatory Matters [Line Items]        
Common stock, shares authorized 150,000,000 150,000,000 120,000,000 150,000,000