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13. STOCK-BASED COMPENSATION (Tables)
3 Months Ended
Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of stock option transactions
    Number of Option
and Warrants
Outstanding and exercisable
  Weighted- Average Exercise price of Option
and Warrants
  Range of
Exercise Price per Common Share
Balance, January 1, 2019     2,518,000     $ 0.97       $0.71 - $4.80  
Exercised  during the period ended March 31, 2019     (245,000 )   $ 0.71     $ 0.71  
Expired during the period ended March 31, 2019     (12,500 )   $ 1.78     $ 1.78  
Balance, March 31, 2019     2,260,500     $ 0.99       $0.71 - $4.80  

 

Schedule Stock and Warrants Options Outstanding
Stock and Warrants Options Exercisable and Outstanding
            Weighted Average
            Remaining
    Outstanding at March 31, 2019   Range of
Exercise Prices
  Contractual Life
 (Years)
Exercisable and outstanding     2,260,500       $0.71 - $4.80       3.14