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3. Property and Equipment (Details Narrative) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Abstract]        
Depreciation expense $ 32,925 $ 545 $ 27,993 $ 2,182