Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Summary of Stock Options Activity (Detail)

v2.4.0.8
Common Stock - Summary of Stock Options Activity (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Number of Optioned Common Shares, Beginning Balance 1,006,991  
Number of Optioned Common Shares, Option grants 260,097  
Number of Optioned Common Shares, Option expired     
Number of Optioned Common Shares, Option exercises (10,000) (3,100)
Number of Optioned Common Shares, Options forfeited     
Number of Optioned Common Shares, Ending Balance 1,257,088  
Weighted Average Exercise Price, Beginning Balance $ 11.39  
Weighted Average Exercise Price, Option grants $ 11.79  
Weighted Average Exercise Price, Option expired     
Weighted Average Exercise Price, Option exercises $ 3.00  
Weighted Average Exercise Price, Options forfeited     
Weighted Average Exercise Price, Ending Balance $ 11.47