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Share-Based Payments - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 14, 2016
Jan. 01, 2016
Jan. 01, 2015
Mar. 31, 2016
Mar. 31, 2015
Feb. 06, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total unrecognized compensation cost related to non-vested stock options and unvested restricted stock       $ 3,700,000    
Total unrecognized compensation cost related to non-vested stock options and unvested restricted stock, recognition period (in years)       2 years 29 days    
Share-Based Compensation Expense       $ 586,000 $ 664,000  
Performance Shares            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-Based Compensation Expense       0 $ 0  
Unrecognized compensation expense related to performance based awards       $ 42,000    
2014 Employee Stock Purchase Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares authorized upon initial issuance (in shares)           157,480
Employee stock purchase plan issued during period 20,760          
Purchase price of shares authorized (in dollars per share) $ 0.31          
Stock Incentive Plan 2014            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase in number of shares reserved for future issuance   786,431 722,331      
Stock Incentive Plan 2014            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares available for issuance       567,289