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13. STOCK-BASED COMPENSATION (Details) - $ / shares
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation [Abstract]    
Number of Option and Warrants Outstanding, Beginning balance 185,000 2,399,000
Number of Option and Warrants Outstanding, Granted 661,000 80,000
Number of Option and Warrants exercised in period 0 (1,831,500)
Number of Option and Warrants expired (37,500) (462,500)
Number of Option and Warrants Outstanding, Ending Balance 808,500 185,000
Weighted- Average Exercise price of Option and Warrants, outstanding beginning of period $ 2.19 $ 1.39
Weighted- Average Exercise price of Option and Warrants, granted in period 1.47 1.87
Weighted- Average Exercise price of Option and Warrants, exercised in period 0.00 1.11
Weighted- Average Exercise price of Option and Warrants, expired in period 2.18 2.24
Weighted- Average Exercise price of Option and Warrants, outstanding end of period $ 1.61 $ 2.19
Range of Exercise Price per Common Share, Beginning Balance $1.54 - $4.80 0.95 - $12.60
Range of Exercise Price per Common Share, Granted and Vested $1.44 - $1.98 $1.45 - $2.17
Range of Exercise Price per Common Share, Exercised $ 0.00 $ 1.11
Range of Exercise Price per Common Share, Expired $1.83-$2.55 $0.95 - $12.60
Range of Exercise Price per Common Share, Ending Balance $1.44 - $4.80 $1.54 - $4.80