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Share-based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 9 Months Ended
Jun. 30, 2016
Mar. 31, 2013
Mar. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation expense related to unvested stock options     $ 1.4  
Expected weighted average period for recognition of compensation expense     1 year 6 months  
Directors        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     12 months  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years  
2008 Omnibus Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock authorized       10,186,000
Shares available for future grant     5,065,940  
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected weighted average period for recognition of compensation expense     1 year 3 months 18 days  
Fair value of RSUs on the date of grant   $ 3.5    
RSUs grant date fair value per unit   $ 8.63    
Unrecognized compensation expense related to non-vested RSUs     $ 0.4  
Restricted Stock Units (RSUs) | Employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
RSUs granted 364,726      
Number of common stock to be received for each RSUs 1      
RSUs grant date fair value per unit $ 1.61      
RSUs outstanding     363,014  
Restricted Stock Units (RSUs) | Chief Executive Officer        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
RSUs granted   400,000    
Number of common stock to be received for each RSUs   1    
Restricted Stock Units (RSUs) | Chief Executive Officer | Vested on August 30, 2014        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
RSUs vested percentage   33.33%    
Restricted Stock Units (RSUs) | Chief Executive Officer | Vested on August 30, 2015        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
RSUs vested percentage   33.33%    
Restricted Stock Units (RSUs) | Chief Executive Officer | Vested on August 30, 2016        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
RSUs vested percentage   33.33%    
Restricted Stock Units (RSUs) | 2008 Omnibus Plan | Employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of common stock considered per unit in determining shares for future grant 1.25      
Employee Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     36 months  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years  
Employee Stock Option | Vesting one year from the date of grant        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
RSUs vested percentage     25.00%