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9. STOCKHOLDERS' EQUITY (Details 2) - Warrant [Member] - $ / shares
 3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding Warrants, Beginning Balance 26,550,611 35,501,411
Granted, Warrants 1,250,000 250,000
Exercised, Warrants 0 0
Expired, Warrants (1,000,000) (9,200,800)
Outstanding Warrants, Ending Balance 26,800,611 26,550,611
Outstanding Weighted Average Exercise Price, Beginning balance $ 0.34 $ 0.33
Granted, Weighted Average Exercise Price 0.10 0.08
Exercised, Weighted Average Exercise Price 0.00 0.00
Expired, Weighted Average Exercise Price (0.30) (0.30)
Outstanding Weighted Average Exercise Price, Ending balance $ 0.33 $ 0.34