Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Additional Information (Detail)

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Common Stock - Additional Information (Detail)
0 Months Ended
Jun. 30, 2014
May 30, 2014
Dec. 31, 2013
May 30, 2014
Non- employee Directors [Member]
2012 Equity Incentive Plan [Member]
Class of Stock [Line Items]        
Common stock, shares authorized 100,000,000 50,000,000 50,000,000  
Number of fully vested shares granted as award       10,000