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Share-Based Compensation - Summary of Restricted Shares (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Number of Shares Awarded, Non-vested, Beginning Balance 44,566  
Number of Shares Awarded, Granted 329,649 152,169
Number of Shares Awarded, Vested (92,380) (72,821)
Number of Shares Awarded, Forfeited    (34,782)
Number of Shares Awarded, Non-vested, Ending Balance 281,835 44,566
Weighted Average Grant Date Fair Value, Non-vested, Beginning Balance $ 1.73  
Weighted Average Grant Date Fair Value, Granted $ 1.24 $ 1.69
Weighted Average Grant Date Fair Value, Vested $ 1.41 $ 1.65
Weighted Average Grant Date Fair Value, Forfeited    $ 1.73
Weighted Average Grant Date Fair Value, Non-vested, Ending Balance $ 1.26 $ 1.73