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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity

The following summarizes stock option activity for the years ended December 31, 2017 and 2016:

  Number of Shares

Weighted Average Exercise

Price

Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value
Outstanding at January 1, 2016     35,000 $1.92 2.35 $ 24,876
Expired in 2016 (    7,000)  1.21    
Outstanding at December 31, 2016     28,000 $2.10 1.75 $ 19,851
Exercised in 2017 (  7,000) 2.92    
Expired in 2017 (  7,000)  1.02    
Outstanding at December 31, 2017     14,000 $2.23 1.00 $ 10,513

Schedule of Share-based Compensation, Stock Options Outstanding Exercise Prices

The following table summarizes information about stock options outstanding at December 31, 2017:

  Stock Option Outstanding
Range of Exercise Prices Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years)
$ 1.01- $ 2.00 7,000 $ 1.53 0.50
$ 2.01- $ 3.00 7,000    2.92 1.50
  14,000  $2.23 1.00