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Equity Incentive Plan - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 17, 2015
Sep. 30, 2015
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options granted     16,983    
Share based compensation expense   $ 18 $ 43    
Expected future compensation expense   $ 141 $ 141    
Expected future compensation expense, restricted shares vesting period     2 years 3 months    
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options granted 16,983        
Restricted shares vesting service period     3 years    
2014 Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum number of shares under stock option plan authorized for issuance         375,000
Number of shares available for grant under stock option plan   358,017 358,017    
2014 Incentive Plan [Member] | Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options granted     0 0