Earnings Per Common Share - Computation of Earnings per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
|
| Earnings Per Share [Abstract] | ||||
| Basic EPS, Income Numerator | $ 622 | $ 659 | $ (348) | $ 2,211 |
| Dilutive effect of potential common stock options, Income Numerator | 0 | 0 | 0 | 0 |
| Diluted EPS, Income Numerator | $ 622 | $ 659 | $ (348) | $ 2,211 |
| Basic EPS, Common Shares Denominator | 2,710,803 | 2,706,123 | 2,709,887 | 2,704,609 |
| Dilutive effect of potential common stock options, Common Shares Denominator | 8,525 | 11,100 | 8,855 | 7,615 |
| Diluted EPS, Common Shares Denominator | 2,719,328 | 2,717,223 | 2,718,742 | 2,712,224 |
| Basic EPS | $ 0.23 | $ 0.25 | $ (0.13) | $ 0.82 |
| Dilutive effect of potential common stock options, EPS | 0 | 0 | 0 | 0 |
| Diluted EPS | $ 0.23 | $ 0.25 | $ (0.13) | $ 0.82 |