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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2017
Stock-Based Compensation [Abstract]  
Information regarding stock-based compensation plan
Information regarding our stock-based compensation plan is as follows as of and for the years ended December 31:

  
2017
  
2016
 
  
Number
of Shares
  
Weighted-
Average
Exercise
Price
  
Weighted-
Average
Remaining
Contractual
Term (in years)
  
Aggregate
Intrinsic
Value
(in thousands)
  
Number
of Shares
  
Weighted-
Average
Exercise
Price
  
Weighted-
Average
Remaining
Contractual
Term (in years)
  
Aggregate
Intrinsic
Value
(in thousands)
 
Outstanding at beginning of period
  
339,500
  
$
5.31
         
339,800
  
$
4.83
       
Granted
  
115,800
   
7.22
         
74,000
   
6.98
       
Exercised
  
(2,161
)
  
3.37
         
(18,800
)
  
3.96
       
Forfeited
  
(18,864
)
  
4.59
         
(55,500
)
  
5.08
       
Outstanding at end of period
  
434,275
  
$
5.87
   
6.7
  
$
619
   
339,500
  
$
5.31
   
4.9
  
$
878
 
Exercisable at end of period
  
191,395
  
$
4.85
   
6.3
  
$
477
   
138,066
  
$
4.48
   
1.9
  
$
473
 
Stock options valuation assumptions
The following weighted average assumptions were used to value options granted for the years ended December 31:

  
2017
  
2016
 
Expected life
 
5.5 years
  
5.5 years
 
Risk-free interest rate
  
2.15
%
  
1.77
%
Expected volatility
  
33.79
%
  
58.32
%
Expected dividend yield
  
-
   
-
 
Weighted average per share fair value of options granted
 
$
2.44
  
$
3.55