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Stock Options (Tables)
 12 Months Ended
Dec. 31, 2017
Stock Options [Abstract]  
Schedule of option activity
  Number of Options  Weighted average exercise price  Weighted average remaining contractual life (years)  Aggregate intrinsic value $ 
Outstanding, January 1, 2016  1,615,000  $1.09         
Granted - 2016  2,040,000  $1.09         
Exercised - 2016  (485,000) $0.89         
Expired – 2016  (50,000) $1.08         
Outstanding, December 31, 2016  3,120,000  $1.12   3.6     
Granted – 2017  1,441,250  $0.96         
Exercised – 2017  (130,000) $1.27         
Expired – 2017  (325,000) $1.34         
Outstanding, December 31, 2017  4,106,250  $1.04   3.2  $2,173,700 
Exercisable, December 31, 2017  1,891,250  $1.02   2.9  $1,035,900
Schedule of expiration date and exercise price of the options outstanding
Number of Options Exercise Price Expiration Date
600,000 $0.82 03/31/22
150,000 $1.00 10/30/18
1,135,000 $1.05 03/03/19
1,500,000 $1.07 02/22/21
500,000 $1.15 07/28/21
20,000 $1.17 11/01/22
100,000 $1.22 03/03/19
31,250 $1.57 12/31/22
10,000 $1.85 01/29/19