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Stock Compensation Plans - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
May. 13, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation $ 40 $ 43    
2014 Stock Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares available for grant       240,000
Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units, granted 9,130      
Restricted stock units, vested 7,224      
Restricted stock units, nonvested 10,259   8,353  
Vesting period 2 years      
Percentage of units vesting each year 50.00%      
Total unrecognized pre-tax compensation expense related to unvested restricted stock unit awards $ 82      
Stock-based compensation $ 40 $ 43    
Restricted Stock Units [Member] | Vesting Immediately [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units, vested 3,047      
Restricted Stock Units [Member] | Vesting Within Two Year [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units, nonvested 6,083