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Cash and Cash Equivalents (Details Narrative) (10-K) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Jun. 30, 2019
Mar. 10, 2019
Dec. 31, 2018
Cash and cash equivalents $ 2,588,207 $ 2,744,457 $ 2,857,587   $ 3,452,917
Cash on hand 135,436 238,937 353,214   990,323
Time deposits $ 2,452,771 $ 2,505,520 $ 2,504,373   $ 2,462,594
Minimum [Member]          
Percentage of Interest rate for time deposits   2.95%   2.95%  
Maximum [Member]          
Percentage of Interest rate for time deposits   3.25%   3.25%