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Net Loss Per Share - Additional Information (Detail) - $ / shares
shares in Thousands
3 Months Ended 9 Months Ended
Mar. 15, 2016
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Equity option          
Earnings Per Share [Line Items]          
Exercisable options outstanding that enable to purchase shares     825 825 825
Shares with dilutive effect and included in computation of diluted income (loss) per share     335 176 324
Options excluded from computation of diluted income (loss) per share due to anti-dilutive effect   1,045 260 220 260
Restricted stock          
Earnings Per Share [Line Items]          
Exercisable options outstanding that enable to purchase shares   270 141 270 141
Shares with dilutive effect and included in computation of diluted income (loss) per share   5 30 23 19
Restricted stock | Executive Officer          
Earnings Per Share [Line Items]          
Compensation awarded restricted stock units 146        
Closing market price of the common stock $ 2.30