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9. Commitments and Contingencies (March 2019 Note) (Details Narrative) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]        
Rent expense $ 26,025 $ 40,379 $ 13,433 $ 51,117