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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Activity under the Company’s option plans as of and for the nine months ended September 30, 2017 were as follows:

Weighted-
Average
Weighted- Remaining
Average Contractual
Exercise Term Aggregate
      Shares       Price       (In Years)       Intrinsic Value
Outstanding at December 31, 2016 358,367 $      6.26
Granted - -
Exercised 10,846 10.89
Forfeited/cancelled/expired - -
Outstanding at September 30, 2017 347,521 $ 6.11 1.90 $      6,425,663
Exercisable at September 30, 2017 343,991 $ 6.03 1.86 $ 6,387,912
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

The below table represents information regarding restricted shares currently outstanding at September 30, 2017:

Weighted-
Average
Nonvested Grant Date
      Shares       Fair Value
Nonvested at December 31, 2016        111,273 $      16.81
Granted 57,164 23.82
Vested (65,359 ) 16.49
Forfeited/cancelled/expired - -
Nonvested at September 30, 2017 103,078 $ 20.41
Schedule of Unearned Performance Unit Awards [Table Text Block]

A summary of the status of unearned performance unit awards and the change during the period is presented in the table below:

Weighted
Average Grant
Units Units Date Fair
      (expected)       (maximum)       Value
Unearned at December 31, 2016       151,572 189,455 $ 18.47
Awarded 24,891 37,336 22.75
Forfeited - - -
Adjustments (25,269 ) - 18.47
Unearned at September 30, 2017 151,194 226,791 $ 19.19