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9. Share-based Compensation (Tables)
12 Months Ended
Dec. 31, 2014
Notes to Financial Statements  
Summary of stock option activity
    Year Ended     Year Ended  
    December 31, 2014     December 31, 2013  
          Wtd. Avg.           Wtd. Avg.  
          Exercise           Exercise  
    Shares     Price     Shares     Price  
Outstanding at beginning of year     1,417,309     $ 1.36       1,452,082     $ 1.24  
Granted     95,000       3.36       21,427       9.67  
Exercised     (68,520 )     1.22       (25,419 )     1.00  
Forfeited     (49,895 )     1.51       (29,001 )     1.56  
Expired - vested     (3,124 )     2.23       (1,780 )     1.12  
Outstanding at end of year     1,390,770     $ 1.50       1,417,309     $ 1.36  
                                 
 Stock options exercisable at year end     1,225,358     $ 1.33       1,177,588     $ 1.19  
Stock options outstanding by price range
      Number                                              Weighted Average                
Range of     Outstanding at     Remaining     Weighted Average  
Exercise Prices     December 31, 2014     Contractual Life     Exercise Price  
$ 0.49-$1.00       167,853       2.95     $ 0.92  
$ 1.01-$1.30       758,507       4.43     $ 1.14  
$ 1.31-$2.00       333,699       5.51     $ 1.43  
$ 2.01-$10.75       130,711       9.15     $ 4.49  
          1,390,770       4.95     $ 1.50