Annual report pursuant to section 13 and 15(d)

Share-based Compensation - Summary of Restricted Share Activity (Detail)

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Share-based Compensation - Summary of Restricted Share Activity (Detail) (Restricted Stock [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2010
Restricted Stock [Member]
      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unvested Number of shares, Beginning Balance 568 2,636  
Number of shares, Granted 212 343 3,400
Number of shares, Vested (168) (169)  
Vested shares forgone to satisfy minimum statutory withholding (55) (70)  
Number of shares, Forfeitures (103) (2,172)  
Unvested Number of shares, Ending Balance 454 568  
Unvested Weighted average grant date fair value, Beginning Balance $ 1.87 $ 1.88  
Weighted average grant date fair value, Granted $ 1.73 $ 1.82  
Weighted average grant date fair value, Vested $ 2.00 $ 1.82  
Weighted average grant date fair value, Vested shares forgone to satisfy minimum statutory withholding $ 1.82 $ 1.81  
Weighted average grant date fair value, Forfeitures $ 1.65 $ 1.40  
Unvested Weighted average grant date fair value, Ending Balance $ 1.82 $ 1.87