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Significant Accounting Policies (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2019
Jan. 01, 2019
Significant Accounting Policies (Textual)        
Foreign exchange risk, description If the THB had strengthened/weakened by 1.27% against the USD (the average monthly variance during the 2-year period ended 31 December 2018)      
Post-tax profit higher/lower $ 169,000 $ 63,000    
Borrowings interest rates basis points 100      
Post-tax interest rate risk $ 43,000 $ 105,000    
Weighted average incremental borrowing rate       3.80%
Lease liabilities increased       $ 7,271,152
Right-of-use assets increased       $ 7,271,152
Operating leases lease liabilities recognized     $ 6,121,542