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8. Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2015
Stockholders Equity Tables  
Changes in consolidated stockholders' equity
    Common Stock Shares     Common Stock Amount     Additional Paid-In Capital     Accumulated Other Comprehensive Income     Retained Earnings     Total  
                                     
Balance at December 31, 2014     13,665,087     $ 8,199     $ 24,816     $     $ 218     $ 33,233  
Common stock option exercise and issued     53,309       32       44                     76  
Share-based compensation expense                 33                     33  
Net income                               829       829  
Unrealized gain on available- for-sales securities, net of tax                       700             700  
Balance at September 30, 2015     13,718,396     $ 8,231     $ 24,876     $ 700     $ 1,047     $ 34,871