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
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]        
Stock options granted 25,000 0 35,000 100,000
Weighted-average grant date fair value $ 3.32 $ 0.00 $ 3.41 $ 1.03
Stock options vested     8,333  
Stock options forfeited     26,050