Significant Accounting Policies and Related Matters - Computation of Basic and Diluted Net Income per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Basic: | |||||||||||
| Net income available for common stockholders | $ 2,530 | $ 2,092 | $ 1,767 | $ 1,369 | $ 1,916 | $ 934 | $ 1,272 | $ (207) | $ 7,758 | $ 3,915 | $ 3,202 |
| Weighted average shares outstanding | 17,764 | 16,614 | 15,317 | ||||||||
| Basic earnings per share | $ 0.14 | $ 0.12 | $ 0.10 | $ 0.08 | $ 0.11 | $ 0.05 | $ 0.08 | $ (0.01) | $ 0.44 | $ 0.24 | $ 0.21 |
| Diluted: | |||||||||||
| Net income available for common stockholders | $ 2,530 | $ 2,092 | $ 1,767 | $ 1,369 | $ 1,916 | $ 934 | $ 1,272 | $ (207) | $ 7,758 | $ 3,915 | $ 3,202 |
| Weighted-average shares outstanding | 17,764 | 16,614 | 15,317 | ||||||||
| Common stock equivalents, if dilutive | 552 | 394 | 447 | ||||||||
| Shares used in computing diluted earnings per common share | 18,316 | 17,008 | 15,764 | ||||||||
| Diluted earnings per share | $ 0.13 | $ 0.11 | $ 0.10 | $ 0.08 | $ 0.11 | $ 0.05 | $ 0.08 | $ (0.01) | $ 0.42 | $ 0.23 | $ 0.20 |
| Shares excluded in computing diluted earnings per share as those shares would be anti-dilutive | 55 | 277 | 373 | ||||||||