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Net (Loss) Income Per Common Share - Computation of Basic and Diluted Net (Loss) Per Share (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Numerator for basic and diluted net income (loss) per share:      
Net (loss) $ (3,380) $ (3,816) $ 338
Preferred deemed dividend (9,455)    
Less: Net income (loss) allocated to participating securities (96) (21)  
Net (loss) attributable to common shareholders, net of loss attributable to participating securities $ (12,739) $ (3,795)  
Denominator for basic and diluted net income (loss) per share:      
Weighted average shares outstanding 201,978,462 201,156,078  
Weighted average unvested restricted shares outstanding (1,504,392) (1,100,414)  
Denominator for basic and diluted net income (loss) per share: 200,474,070 200,055,664  
Basic and diluted net (loss) per share attributable to common shareholders $ (0.06) $ (0.02)