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Bank Loans (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Cathay United Bank [Member]    
Total $ 243,000 $ 245,250
CTBC Bank [Member]    
Total 648,000 654,000
Cathay Bnak [Member]    
Total 1,000,000
Cathay United Loan Agreement [Member]    
Total $ 1,891,000 $ 1,891,000