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12. STOCK OPTIONS AND WARRANTS (Tables)
6 Months Ended
Jun. 30, 2019
Share-based Payment Arrangement [Abstract]  
Schedule of warrants
   Number of Warrants 
     
Outstanding December 31, 2018   134,359 
Public Offering   2,300,000 
Underwriter Warrants   100,000 
Over-Allottment Warrants for Underwriters   10,000 
Expired   (3,467)
Outstanding June 30, 2019   2,540,892