Annual report pursuant to Section 13 and 15(d)

Share-based Compensation - Summary of Restricted Share Activity, Excluding Company's Employee Stock Purchase Plan (Detail)

v3.3.1.900
Share-based Compensation - Summary of Restricted Share Activity, Excluding Company's Employee Stock Purchase Plan (Detail) - Restricted Stock [Member] - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unvested Number of Shares, Beginning Balance 256,000 454,000
Number of Shares, Granted 62,000 0
Number of Shares, Vested (83,000) (128,000)
Vested shares forgone to satisfy minimum statutory withholding (24,000) (66,000)
Number of Shares, Forfeitures (40,000) (4,000)
Unvested Number of Shares, Ending Balance 171,000 256,000
Unvested Weighted average grant date fair value, Beginning Balance $ 1.78 $ 1.82
Weighted average grant date fair value, Granted 2.60  
Weighted average grant date fair value, Vested 1.53 1.39
Weighted average grant date fair value, Vested shares forgone to satisfy minimum statutory withholding 2.96 2.68
Weighted average grant date fair value, Forfeitures 1.79 2.03
Unvested Weighted average grant date fair value, Ending Balance $ 2.09 $ 1.78
Aggregate fair value, Granted $ 244  
Aggregate fair value, Vested $ 71 $ 347
Aggregate fair value, Vested shares forgone to satisfy minimum statutory withholding   $ 174