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7. STOCKHOLDERS' EQUITY (Details 2) - Warrant [Member] - $ / shares
 6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding Warrants, Beginning Balance 35,501,411 37,076,413
Granted, Warrants 0 4,774,998
Exercised, Warrants 0 (975,000)
Expired, Warrants (425,000) (5,375,000)
Outstanding Warrants, Ending Balance 35,076,411 35,501,411
Outstanding Weighted Average Exercise Price, Beginning balance $ 0.33 $ 0.31
Granted, Weighted Average Exercise Price 0.00 0.24
Exercised, Weighted Average Exercise Price 0.00 0.05
Expired, Weighted Average Exercise Price (0.24) 0.13
Outstanding Weighted Average Exercise Price, Ending balance $ 0.33 $ 0.33