Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Additional Information (Detail)

v2.4.0.8
Stock-based Compensation - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended 0 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
May 30, 2014
Non- employee Directors [Member]
2012 Equity Incentive Plan [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]          
Stock options granted 100,000 25,000 100,000 35,000  
Weighted-average grant date fair value $ 2.81 $ 3.32 $ 2.81 $ 3.41  
Stock options vested     67,391    
Stock options forfeited     37,142    
Number of fully vested shares granted as award         10,000
Shares issued under incentive plan         50,000
Grant date fair value of shares issued         $ 102,500